Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Koper, Koper, Slovenia Historical Air Quality Analysis

Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!

Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+

March Air Quality Analysis

Koper, Koper, Slovenia

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
10th Mar 2022
113AQI
Lowest AQI recorded on
30th Mar 2025
22AQI

Same Day Analysis (12th March):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 34 of Good air quality, showing improvement over 2025, 2024 and 2022 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 11th Mar - 12th Mar 2026

Koper, Koper, Slovenia

AQI
Day
Night
.

6 AM11th Mar 2026

5 PM

5 AM12th Mar 2026

Day time
Avg. Highest Time
5PM11th Mar

52AQI

Avg. Lowest Time
1PM11th Mar

33AQI

Night time
Avg. Highest Time
10PM11th Mar

76AQI

Avg. Lowest Time
5AM12th Mar

21AQI

In the last 24 hours,

Koper's AQI reached its highest point of 76 at 10 PM during the Night, while the lowest point, 21, was recorded at 5 AM during the Night between 11th Mar and 12th Mar 2026.

Day & Night AQI Trend : Feb - Mar 2026

Koper, Koper, Slovenia

FebMar
11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th
Day
Night
11th Feb 2026216 AMAQI
11th Feb 2026217 AMAQI
11th Feb 2026198 AMAQI
11th Feb 2026179 AMAQI
11th Feb 20261210 AMAQI
11th Feb 20262111 AMAQI
11th Feb 20261212 PMAQI
11th Feb 2026121 PMAQI
11th Feb 2026102 PMAQI
11th Feb 2026103 PMAQI
11th Feb 2026124 PMAQI
11th Feb 2026105 PMAQI
11th Feb 2026126 PMAQI
11th Feb 2026177 PMAQI
11th Feb 2026348 PMAQI
11th Feb 2026299 PMAQI
11th Feb 20262510 PMAQI
11th Feb 20261711 PMAQI
12th Feb 20262512 AMAQI
12th Feb 2026251 AMAQI
12th Feb 2026172 AMAQI
12th Feb 2026213 AMAQI
12th Feb 2026194 AMAQI
12th Feb 2026195 AMAQI

9°C7/10°C

12th Feb 2026216 AMAQI
12th Feb 2026217 AMAQI
12th Feb 2026238 AMAQI
12th Feb 2026219 AMAQI
12th Feb 20262310 AMAQI
12th Feb 20261711 AMAQI
12th Feb 20262312 PMAQI
12th Feb 2026191 PMAQI
12th Feb 2026212 PMAQI
12th Feb 2026143 PMAQI
12th Feb 2026174 PMAQI
12th Feb 2026125 PMAQI
12th Feb 2026176 PMAQI
12th Feb 2026257 PMAQI
12th Feb 2026278 PMAQI
12th Feb 2026469 PMAQI
12th Feb 20263810 PMAQI
12th Feb 20264411 PMAQI
13th Feb 20263212 AMAQI
13th Feb 2026541 AMAQI
13th Feb 2026402 AMAQI
13th Feb 2026233 AMAQI
13th Feb 2026364 AMAQI
13th Feb 2026455 AMAQI

9°C8/10°C

13th Feb 2026386 AMAQI
13th Feb 2026447 AMAQI
13th Feb 2026528 AMAQI
13th Feb 2026449 AMAQI
13th Feb 20262110 AMAQI
13th Feb 20263611 AMAQI
13th Feb 20262412 PMAQI
13th Feb 2026351 PMAQI
13th Feb 2026102 PMAQI
13th Feb 2026313 PMAQI
13th Feb 2026254 PMAQI
13th Feb 2026165 PMAQI
13th Feb 202686 PMAQI
13th Feb 2026127 PMAQI
13th Feb 2026408 PMAQI
13th Feb 2026529 PMAQI
13th Feb 20264610 PMAQI
13th Feb 20263811 PMAQI
14th Feb 20263612 AMAQI
14th Feb 2026381 AMAQI
14th Feb 2026362 AMAQI
14th Feb 2026313 AMAQI
14th Feb 2026254 AMAQI
14th Feb 2026295 AMAQI

9°C7/14°C

14th Feb 2026256 AMAQI
14th Feb 2026177 AMAQI
14th Feb 2026178 AMAQI
14th Feb 2026319 AMAQI
14th Feb 20262510 AMAQI
14th Feb 20263311 AMAQI
14th Feb 20264412 PMAQI
14th Feb 2026401 PMAQI
14th Feb 2026212 PMAQI
14th Feb 2026173 PMAQI
14th Feb 2026144 PMAQI
14th Feb 2026175 PMAQI
14th Feb 2026126 PMAQI
14th Feb 2026257 PMAQI
14th Feb 2026428 PMAQI
14th Feb 2026409 PMAQI
14th Feb 20264210 PMAQI
14th Feb 20264711 PMAQI
15th Feb 20263312 AMAQI
15th Feb 2026361 AMAQI
15th Feb 2026172 AMAQI
15th Feb 202683 AMAQI
15th Feb 2026194 AMAQI
15th Feb 202685 AMAQI

9°C7/12°C

15th Feb 202646 AMAQI
15th Feb 202687 AMAQI
15th Feb 202688 AMAQI
15th Feb 202649 AMAQI
15th Feb 2026410 AMAQI
15th Feb 2026411 AMAQI
15th Feb 2026412 PMAQI
15th Feb 202641 PMAQI
15th Feb 202642 PMAQI
15th Feb 2026123 PMAQI
15th Feb 2026144 PMAQI
15th Feb 2026125 PMAQI
15th Feb 202686 PMAQI
15th Feb 2026127 PMAQI
15th Feb 2026218 PMAQI
15th Feb 2026469 PMAQI
15th Feb 20262910 PMAQI
15th Feb 20265111 PMAQI
16th Feb 20265212 AMAQI
16th Feb 2026381 AMAQI
16th Feb 2026342 AMAQI
16th Feb 2026253 AMAQI
16th Feb 2026254 AMAQI
16th Feb 2026255 AMAQI

8°C4/11°C

16th Feb 2026216 AMAQI
16th Feb 2026257 AMAQI
16th Feb 2026238 AMAQI
16th Feb 2026319 AMAQI
16th Feb 20263610 AMAQI
16th Feb 20262311 AMAQI
16th Feb 20261212 PMAQI
16th Feb 2026121 PMAQI
16th Feb 2026172 PMAQI
16th Feb 2026193 PMAQI
16th Feb 2026174 PMAQI
16th Feb 2026235 PMAQI
16th Feb 2026166 PMAQI
16th Feb 2026127 PMAQI
16th Feb 2026278 PMAQI
16th Feb 2026219 PMAQI
16th Feb 20262510 PMAQI
16th Feb 20263111 PMAQI
17th Feb 20263812 AMAQI
17th Feb 2026401 AMAQI
17th Feb 2026252 AMAQI
17th Feb 2026333 AMAQI
17th Feb 2026214 AMAQI
17th Feb 2026255 AMAQI

6°C3/8°C

17th Feb 2026256 AMAQI
17th Feb 2026257 AMAQI
17th Feb 2026378 AMAQI
17th Feb 2026269 AMAQI
17th Feb 20265610 AMAQI
17th Feb 20263811 AMAQI
17th Feb 20263312 PMAQI
17th Feb 2026311 PMAQI
17th Feb 2026122 PMAQI
17th Feb 2026123 PMAQI
17th Feb 2026124 PMAQI
17th Feb 2026105 PMAQI
17th Feb 2026176 PMAQI
17th Feb 2026177 PMAQI
17th Feb 2026178 PMAQI
17th Feb 2026539 PMAQI
17th Feb 20265210 PMAQI
17th Feb 20265711 PMAQI
18th Feb 20265512 AMAQI
18th Feb 2026361 AMAQI
18th Feb 2026342 AMAQI
18th Feb 2026383 AMAQI
18th Feb 2026254 AMAQI
18th Feb 2026235 AMAQI

7°C4/11°C

18th Feb 2026196 AMAQI
18th Feb 2026217 AMAQI
18th Feb 2026218 AMAQI
18th Feb 2026279 AMAQI
18th Feb 20263610 AMAQI
18th Feb 20262711 AMAQI
18th Feb 20261012 PMAQI
18th Feb 202681 PMAQI
18th Feb 2026102 PMAQI
18th Feb 202683 PMAQI
18th Feb 202684 PMAQI
18th Feb 202685 PMAQI
18th Feb 2026126 PMAQI
18th Feb 2026217 PMAQI
18th Feb 2026408 PMAQI
18th Feb 2026509 PMAQI
18th Feb 20264410 PMAQI
18th Feb 20265211 PMAQI
19th Feb 20265212 AMAQI
19th Feb 2026481 AMAQI
19th Feb 2026532 AMAQI
19th Feb 2026383 AMAQI
19th Feb 2026274 AMAQI
19th Feb 2026215 AMAQI

6°C2/12°C

19th Feb 2026216 AMAQI
19th Feb 2026177 AMAQI
19th Feb 2026148 AMAQI
19th Feb 2026149 AMAQI
19th Feb 20261410 AMAQI
19th Feb 20262111 AMAQI
19th Feb 20262712 PMAQI
19th Feb 2026171 PMAQI
19th Feb 2026142 PMAQI
19th Feb 2026103 PMAQI
19th Feb 202684 PMAQI
19th Feb 202685 PMAQI
19th Feb 202686 PMAQI
19th Feb 202687 PMAQI
19th Feb 2026148 PMAQI
19th Feb 2026179 PMAQI
19th Feb 20261710 PMAQI
19th Feb 20263611 PMAQI
20th Feb 20263612 AMAQI
20th Feb 2026211 AMAQI
20th Feb 2026252 AMAQI
20th Feb 2026213 AMAQI
20th Feb 2026164 AMAQI
20th Feb 2026125 AMAQI

10°C7/12°C

20th Feb 2026126 AMAQI
20th Feb 202687 AMAQI
20th Feb 202688 AMAQI
20th Feb 2026109 AMAQI
20th Feb 20261010 AMAQI
20th Feb 2026811 AMAQI
20th Feb 2026812 PMAQI
20th Feb 202681 PMAQI
20th Feb 2026102 PMAQI
20th Feb 2026123 PMAQI
20th Feb 2026124 PMAQI
20th Feb 2026125 PMAQI
20th Feb 202686 PMAQI
20th Feb 2026127 PMAQI
20th Feb 2026178 PMAQI
20th Feb 2026219 PMAQI
20th Feb 20261410 PMAQI
20th Feb 20262111 PMAQI
21st Feb 20261212 AMAQI
21st Feb 2026161 AMAQI
21st Feb 2026252 AMAQI
21st Feb 202663 AMAQI
21st Feb 2026264 AMAQI
21st Feb 202675 AMAQI

7°C4/9°C

21st Feb 202666 AMAQI
21st Feb 2026127 AMAQI
21st Feb 202668 AMAQI
21st Feb 2026149 AMAQI
21st Feb 20261910 AMAQI
21st Feb 20262011 AMAQI
21st Feb 20262012 PMAQI
21st Feb 2026191 PMAQI
21st Feb 2026182 PMAQI
21st Feb 2026213 PMAQI
21st Feb 2026214 PMAQI
21st Feb 2026365 PMAQI
21st Feb 2026286 PMAQI
21st Feb 2026527 PMAQI
21st Feb 2026678 PMAQI
21st Feb 2026689 PMAQI
21st Feb 20266910 PMAQI
21st Feb 20265811 PMAQI
22nd Feb 20266912 AMAQI
22nd Feb 2026711 AMAQI
22nd Feb 2026532 AMAQI
22nd Feb 2026463 AMAQI
22nd Feb 2026424 AMAQI
22nd Feb 2026385 AMAQI

5°C1/10°C

22nd Feb 2026316 AMAQI
22nd Feb 2026387 AMAQI
22nd Feb 2026408 AMAQI
22nd Feb 2026429 AMAQI
22nd Feb 20264910 AMAQI
22nd Feb 20264411 AMAQI
22nd Feb 20265012 PMAQI
22nd Feb 2026481 PMAQI
22nd Feb 2026232 PMAQI
22nd Feb 2026233 PMAQI
22nd Feb 2026254 PMAQI
22nd Feb 2026295 PMAQI
22nd Feb 2026546 PMAQI
22nd Feb 2026577 PMAQI
22nd Feb 2026698 PMAQI
22nd Feb 2026689 PMAQI
22nd Feb 20267610 PMAQI
22nd Feb 20266811 PMAQI
23rd Feb 20267212 AMAQI
23rd Feb 2026701 AMAQI
23rd Feb 2026762 AMAQI
23rd Feb 2026733 AMAQI
23rd Feb 2026704 AMAQI
23rd Feb 2026695 AMAQI

7°C3/12°C

23rd Feb 2026276 AMAQI
23rd Feb 2026217 AMAQI
23rd Feb 2026198 AMAQI
23rd Feb 2026609 AMAQI
23rd Feb 20267410 AMAQI
23rd Feb 20267011 AMAQI
23rd Feb 20266612 PMAQI
23rd Feb 2026571 PMAQI
23rd Feb 2026582 PMAQI
23rd Feb 2026573 PMAQI
23rd Feb 2026524 PMAQI
23rd Feb 2026605 PMAQI
23rd Feb 2026826 PMAQI
23rd Feb 2026897 PMAQI
23rd Feb 2026908 PMAQI
23rd Feb 2026989 PMAQI
23rd Feb 20268510 PMAQI
23rd Feb 20269411 PMAQI
24th Feb 202610012 AMAQI
24th Feb 2026981 AMAQI
24th Feb 2026832 AMAQI
24th Feb 2026823 AMAQI
24th Feb 2026764 AMAQI
24th Feb 2026715 AMAQI

9°C6/12°C

24th Feb 2026716 AMAQI
24th Feb 2026697 AMAQI
24th Feb 2026748 AMAQI
24th Feb 2026759 AMAQI
24th Feb 20268210 AMAQI
24th Feb 20268911 AMAQI
24th Feb 20268812 PMAQI
24th Feb 2026821 PMAQI
24th Feb 2026892 PMAQI
24th Feb 2026863 PMAQI
24th Feb 2026874 PMAQI
24th Feb 2026885 PMAQI
24th Feb 2026846 PMAQI
24th Feb 2026627 PMAQI
24th Feb 2026648 PMAQI
24th Feb 2026739 PMAQI
24th Feb 20267410 PMAQI
24th Feb 20265811 PMAQI
25th Feb 20266012 AMAQI
25th Feb 2026461 AMAQI
25th Feb 2026422 AMAQI
25th Feb 2026403 AMAQI
25th Feb 2026344 AMAQI
25th Feb 2026295 AMAQI

10°C7/13°C

25th Feb 2026276 AMAQI
25th Feb 2026277 AMAQI
25th Feb 2026258 AMAQI
25th Feb 2026279 AMAQI
25th Feb 20262710 AMAQI
25th Feb 20263811 AMAQI
25th Feb 20262712 PMAQI
25th Feb 2026251 PMAQI
25th Feb 2026252 PMAQI
25th Feb 2026213 PMAQI
25th Feb 2026214 PMAQI
25th Feb 2026255 PMAQI
25th Feb 2026276 PMAQI
25th Feb 2026297 PMAQI
25th Feb 2026448 PMAQI
25th Feb 2026449 PMAQI
25th Feb 20264410 PMAQI
25th Feb 20264611 PMAQI
26th Feb 20264012 AMAQI
26th Feb 2026421 AMAQI
26th Feb 2026402 AMAQI
26th Feb 2026463 AMAQI
26th Feb 2026424 AMAQI
26th Feb 2026345 AMAQI

10°C6/15°C

26th Feb 2026296 AMAQI
26th Feb 2026387 AMAQI
26th Feb 2026408 AMAQI
26th Feb 2026469 AMAQI
26th Feb 20264610 AMAQI
26th Feb 20264211 AMAQI
26th Feb 20264212 PMAQI
26th Feb 2026361 PMAQI
26th Feb 2026292 PMAQI
26th Feb 2026313 PMAQI
26th Feb 2026384 PMAQI
26th Feb 2026475 PMAQI
26th Feb 2026386 PMAQI
26th Feb 2026407 PMAQI
26th Feb 2026508 PMAQI
26th Feb 2026689 PMAQI
26th Feb 20267110 PMAQI
26th Feb 20267911 PMAQI
27th Feb 20267812 AMAQI
27th Feb 2026831 AMAQI
27th Feb 2026662 AMAQI
27th Feb 2026763 AMAQI
27th Feb 2026704 AMAQI
27th Feb 2026605 AMAQI

10°C6/15°C

27th Feb 2026676 AMAQI
27th Feb 2026667 AMAQI
27th Feb 2026748 AMAQI
27th Feb 2026789 AMAQI
27th Feb 20268710 AMAQI
27th Feb 20267211 AMAQI
27th Feb 20266512 PMAQI
27th Feb 2026561 PMAQI
27th Feb 2026422 PMAQI
27th Feb 2026423 PMAQI
27th Feb 2026534 PMAQI
27th Feb 2026715 PMAQI
27th Feb 2026676 PMAQI
27th Feb 2026767 PMAQI
27th Feb 2026868 PMAQI
27th Feb 2026819 PMAQI
27th Feb 20267210 PMAQI
27th Feb 20267411 PMAQI
28th Feb 20267212 AMAQI
28th Feb 2026761 AMAQI
28th Feb 2026662 AMAQI
28th Feb 2026693 AMAQI
28th Feb 2026584 AMAQI
28th Feb 2026465 AMAQI

10°C7/15°C

28th Feb 2026516 AMAQI
28th Feb 2026527 AMAQI
28th Feb 2026548 AMAQI
28th Feb 2026549 AMAQI
28th Feb 20266010 AMAQI
28th Feb 20265511 AMAQI
28th Feb 20266212 PMAQI
28th Feb 2026621 PMAQI
28th Feb 2026672 PMAQI
28th Feb 2026623 PMAQI
28th Feb 2026604 PMAQI
28th Feb 2026685 PMAQI
28th Feb 2026786 PMAQI
28th Feb 2026767 PMAQI
28th Feb 2026868 PMAQI
28th Feb 2026949 PMAQI
28th Feb 20269410 PMAQI
28th Feb 20269711 PMAQI
1st Mar 202610612 AMAQI
1st Mar 20261121 AMAQI
1st Mar 2026992 AMAQI
1st Mar 2026373 AMAQI
1st Mar 2026664 AMAQI
1st Mar 2026785 AMAQI

10°C7/15°C

1st Mar 2026726 AMAQI
1st Mar 2026767 AMAQI
1st Mar 2026768 AMAQI
1st Mar 2026689 AMAQI
1st Mar 20266810 AMAQI
1st Mar 20267111 AMAQI
1st Mar 20266612 PMAQI
1st Mar 2026641 PMAQI
1st Mar 2026702 PMAQI
1st Mar 2026763 PMAQI
1st Mar 2026744 PMAQI
1st Mar 2026735 PMAQI
1st Mar 2026806 PMAQI
1st Mar 2026807 PMAQI
1st Mar 2026868 PMAQI
1st Mar 20261089 PMAQI
1st Mar 202610610 PMAQI
1st Mar 202610611 PMAQI
2nd Mar 202612512 AMAQI
2nd Mar 20261281 AMAQI
2nd Mar 20261152 AMAQI
2nd Mar 20261093 AMAQI
2nd Mar 2026954 AMAQI
2nd Mar 2026945 AMAQI

10°C7/14°C

2nd Mar 20261086 AMAQI
2nd Mar 20261087 AMAQI
2nd Mar 2026858 AMAQI
2nd Mar 2026729 AMAQI
2nd Mar 20266810 AMAQI
2nd Mar 20266911 AMAQI
2nd Mar 20266212 PMAQI
2nd Mar 2026541 PMAQI
2nd Mar 2026532 PMAQI
2nd Mar 2026513 PMAQI
2nd Mar 2026334 PMAQI
2nd Mar 2026425 PMAQI
2nd Mar 2026466 PMAQI
2nd Mar 2026427 PMAQI
2nd Mar 2026428 PMAQI
2nd Mar 2026629 PMAQI
2nd Mar 20265510 PMAQI
2nd Mar 20265411 PMAQI
3rd Mar 20264912 AMAQI
3rd Mar 2026461 AMAQI
3rd Mar 2026552 AMAQI
3rd Mar 2026403 AMAQI
3rd Mar 2026364 AMAQI
3rd Mar 2026425 AMAQI

11°C7/14°C

3rd Mar 2026336 AMAQI
3rd Mar 2026317 AMAQI
3rd Mar 2026368 AMAQI
3rd Mar 2026339 AMAQI
3rd Mar 20264610 AMAQI
3rd Mar 20265011 AMAQI
3rd Mar 20264912 PMAQI
3rd Mar 2026361 PMAQI
3rd Mar 2026422 PMAQI
3rd Mar 2026333 PMAQI
3rd Mar 2026334 PMAQI
3rd Mar 2026335 PMAQI
3rd Mar 2026316 PMAQI
3rd Mar 2026447 PMAQI
3rd Mar 2026518 PMAQI
3rd Mar 2026669 PMAQI
3rd Mar 20266410 PMAQI
3rd Mar 20266611 PMAQI
4th Mar 20266412 AMAQI
4th Mar 2026671 AMAQI
4th Mar 2026652 AMAQI
4th Mar 2026683 AMAQI
4th Mar 2026654 AMAQI
4th Mar 2026765 AMAQI

9°C6/14°C

4th Mar 2026446 AMAQI
4th Mar 2026407 AMAQI
4th Mar 2026338 AMAQI
4th Mar 2026369 AMAQI
4th Mar 20263810 AMAQI
4th Mar 20264411 AMAQI
4th Mar 20265212 PMAQI
4th Mar 2026601 PMAQI
4th Mar 2026552 PMAQI
4th Mar 2026563 PMAQI
4th Mar 2026564 PMAQI
4th Mar 2026605 PMAQI
4th Mar 2026706 PMAQI
4th Mar 2026757 PMAQI
4th Mar 2026808 PMAQI
4th Mar 2026789 PMAQI
4th Mar 20268610 PMAQI
4th Mar 20267611 PMAQI
5th Mar 20268412 AMAQI
5th Mar 2026811 AMAQI
5th Mar 2026792 AMAQI
5th Mar 2026743 AMAQI
5th Mar 2026624 AMAQI
5th Mar 2026785 AMAQI

9°C6/14°C

5th Mar 2026716 AMAQI
5th Mar 2026727 AMAQI
5th Mar 2026588 AMAQI
5th Mar 2026599 AMAQI
5th Mar 20269210 AMAQI
5th Mar 20266911 AMAQI
5th Mar 20267312 PMAQI
5th Mar 2026781 PMAQI
5th Mar 2026822 PMAQI
5th Mar 2026923 PMAQI
5th Mar 2026904 PMAQI
5th Mar 2026975 PMAQI
5th Mar 2026956 PMAQI
5th Mar 2026957 PMAQI
5th Mar 20261128 PMAQI
5th Mar 20261109 PMAQI
5th Mar 202610810 PMAQI
5th Mar 202611411 PMAQI
6th Mar 202611512 AMAQI
6th Mar 20261061 AMAQI
6th Mar 20261082 AMAQI
6th Mar 20261053 AMAQI
6th Mar 20261104 AMAQI
6th Mar 20261085 AMAQI

9°C6/15°C

6th Mar 2026956 AMAQI
6th Mar 20261027 AMAQI
6th Mar 2026988 AMAQI
6th Mar 20261049 AMAQI
6th Mar 202610610 AMAQI
6th Mar 202611011 AMAQI
6th Mar 202611612 PMAQI
6th Mar 20261301 PMAQI
6th Mar 20261202 PMAQI
6th Mar 20261123 PMAQI
6th Mar 20261004 PMAQI
6th Mar 2026735 PMAQI
6th Mar 2026696 PMAQI
6th Mar 2026627 PMAQI
6th Mar 2026708 PMAQI
6th Mar 2026839 PMAQI
6th Mar 20269210 PMAQI
6th Mar 20268811 PMAQI
7th Mar 20267012 AMAQI
7th Mar 2026581 AMAQI
7th Mar 2026602 AMAQI
7th Mar 2026693 AMAQI
7th Mar 2026724 AMAQI
7th Mar 2026715 AMAQI

10°C6/16°C

7th Mar 2026706 AMAQI
7th Mar 2026667 AMAQI
7th Mar 2026718 AMAQI
7th Mar 2026659 AMAQI
7th Mar 20266810 AMAQI
7th Mar 20268011 AMAQI
7th Mar 20267012 PMAQI
7th Mar 2026681 PMAQI
7th Mar 2026682 PMAQI
7th Mar 2026833 PMAQI
7th Mar 2026824 PMAQI
7th Mar 2026785 PMAQI
7th Mar 2026936 PMAQI
7th Mar 2026797 PMAQI
7th Mar 2026818 PMAQI
7th Mar 2026979 PMAQI
7th Mar 20269810 PMAQI
7th Mar 20269511 PMAQI
8th Mar 20269712 AMAQI
8th Mar 2026921 AMAQI
8th Mar 2026922 AMAQI
8th Mar 2026883 AMAQI
8th Mar 2026904 AMAQI
8th Mar 20261065 AMAQI

11°C7/16°C

8th Mar 20261006 AMAQI
8th Mar 2026857 AMAQI
8th Mar 2026888 AMAQI
8th Mar 20261059 AMAQI
8th Mar 20268810 AMAQI
8th Mar 20268411 AMAQI
8th Mar 20269812 PMAQI
8th Mar 2026901 PMAQI
8th Mar 2026662 PMAQI
8th Mar 2026593 PMAQI
8th Mar 2026654 PMAQI
8th Mar 2026655 PMAQI
8th Mar 2026706 PMAQI
8th Mar 2026637 PMAQI
8th Mar 2026718 PMAQI
8th Mar 2026819 PMAQI
8th Mar 20267910 PMAQI
8th Mar 20268511 PMAQI
9th Mar 20268412 AMAQI
9th Mar 2026861 AMAQI
9th Mar 2026802 AMAQI
9th Mar 2026863 AMAQI
9th Mar 2026784 AMAQI
9th Mar 2026785 AMAQI

11°C7/16°C

9th Mar 2026876 AMAQI
9th Mar 2026637 AMAQI
9th Mar 2026468 AMAQI
9th Mar 2026449 AMAQI
9th Mar 20264610 AMAQI
9th Mar 20265511 AMAQI
9th Mar 20265512 PMAQI
9th Mar 2026511 PMAQI
9th Mar 2026512 PMAQI
9th Mar 2026513 PMAQI
9th Mar 2026464 PMAQI
9th Mar 2026555 PMAQI
9th Mar 2026626 PMAQI
9th Mar 2026627 PMAQI
9th Mar 2026758 PMAQI
9th Mar 2026979 PMAQI
9th Mar 202610410 PMAQI
9th Mar 202611011 PMAQI
10th Mar 202610012 AMAQI
10th Mar 20261051 AMAQI
10th Mar 20261152 AMAQI
10th Mar 2026983 AMAQI
10th Mar 2026994 AMAQI
10th Mar 20261015 AMAQI

11°C8/16°C

10th Mar 20261066 AMAQI
10th Mar 20261057 AMAQI
10th Mar 2026908 AMAQI
10th Mar 2026869 AMAQI
10th Mar 20266010 AMAQI
10th Mar 20266411 AMAQI
10th Mar 20265012 PMAQI
10th Mar 2026551 PMAQI
10th Mar 2026512 PMAQI
10th Mar 2026333 PMAQI
10th Mar 2026384 PMAQI
10th Mar 2026385 PMAQI
10th Mar 2026386 PMAQI
10th Mar 2026407 PMAQI
10th Mar 2026498 PMAQI
10th Mar 2026659 PMAQI
10th Mar 20267310 PMAQI
10th Mar 20267011 PMAQI
11th Mar 20269012 AMAQI
11th Mar 2026661 AMAQI
11th Mar 2026692 AMAQI
11th Mar 2026503 AMAQI
11th Mar 2026404 AMAQI
11th Mar 2026335 AMAQI

10°C7/14°C

11th Mar 2026366 AMAQI
11th Mar 2026367 AMAQI
11th Mar 2026408 AMAQI
11th Mar 2026389 AMAQI
11th Mar 20264210 AMAQI
11th Mar 20264611 AMAQI
11th Mar 20263812 PMAQI
11th Mar 2026331 PMAQI
11th Mar 2026382 PMAQI
11th Mar 2026383 PMAQI
11th Mar 2026514 PMAQI
11th Mar 2026525 PMAQI
11th Mar 2026446 PMAQI
11th Mar 2026487 PMAQI
11th Mar 2026518 PMAQI
11th Mar 2026669 PMAQI
11th Mar 20267610 PMAQI
11th Mar 20266211 PMAQI
12th Mar 20266412 AMAQI
12th Mar 2026521 AMAQI
12th Mar 2026542 AMAQI
12th Mar 2026563 AMAQI
12th Mar 2026314 AMAQI
12th Mar 2026215 AMAQI

10°C7/14°C

12th Mar 2026336 AMAQI
6 AM
12th Mar 2026387 AMAQI
12th Mar 2026368 AMAQI
12th Mar 20263110 AMAQI
12th Mar 20263111 AMAQI
11 AM
12th Mar 20262512 PMAQI
12th Mar 2026231 PMAQI
12th Mar 2026232 PMAQI
12th Mar 2026213 PMAQI
12th Mar 2026214 PMAQI
12th Mar 2026255 PMAQI
5 PM
12th Mar 2026296 PMAQI
12th Mar 2026237 PMAQI
12th Mar 2026198 PMAQI
12th Mar 2026339 PMAQI
12th Mar 20266410 PMAQI
12th Mar 20262311 PMAQI
11 PM
5 AM

12°C9/15°C

Day time
Avg. Highest Time
10 AM - 11 AM

48AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
2 PM - 5 PM

40AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 AM to 11 AM (Avg. 48), while the lowest AQI was between 2 PM to 5 PM (Avg. 40).
Night time
Avg. Highest Time
12 AM

66AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
6 PM

43AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 12 AM (Avg. 66), while the lowest AQI was between 6 PM to 6 PM (Avg. 43).

2026 Days Vs Air Quality

Koper, Koper, Slovenia

2026

62%

44

35%

25

3%

2

Total number of days with different AQI categories in last 72 days in 2026 (293 days remaining)

Good
44 Days
Moderate
25 Days
Poor
2 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 62%

Health Risk Level:

Moderate

In 2026, 62% of 72 days were within WHO’s safe air quality limits, and 38% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.

Annual Air Quality Insights

Koper, Koper, Slovenia

AQI levels in 2026

AQI (US)
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
40AQI (US)
2nd January 2026
58AQI (US)
3rd January 2026
55AQI (US)
4th January 2026
18AQI (US)
5th January 2026
19AQI (US)
6th January 2026
19AQI (US)
7th January 2026
24AQI (US)
8th January 2026
66AQI (US)
9th January 2026
47AQI (US)
10th January 2026
31AQI (US)
11th January 2026
25AQI (US)
12th January 2026
40AQI (US)
13th January 2026
65AQI (US)
14th January 2026
100AQI (US)
15th January 2026
118AQI (US)
16th January 2026
132AQI (US)
17th January 2026
89AQI (US)
18th January 2026
44AQI (US)
19th January 2026
57AQI (US)
20th January 2026
67AQI (US)
21st January 2026
67AQI (US)
22nd January 2026
78AQI (US)
23rd January 2026
73AQI (US)
24th January 2026
38AQI (US)
25th January 2026
24AQI (US)
26th January 2026
27AQI (US)
27th January 2026
62AQI (US)
28th January 2026
24AQI (US)
29th January 2026
26AQI (US)
30th January 2026
46AQI (US)
31st January 2026
43AQI (US)
1st February 2026
34AQI (US)
2nd February 2026
42AQI (US)
3rd February 2026
32AQI (US)
4th February 2026
34AQI (US)
5th February 2026
22AQI (US)
6th February 2026
19AQI (US)
7th February 2026
37AQI (US)
8th February 2026
28AQI (US)
9th February 2026
34AQI (US)
10th February 2026
32AQI (US)
11th February 2026
22AQI (US)
12th February 2026
23AQI (US)
13th February 2026
33AQI (US)
14th February 2026
29AQI (US)
15th February 2026
15AQI (US)
16th February 2026
25AQI (US)
17th February 2026
30AQI (US)
18th February 2026
26AQI (US)
19th February 2026
22AQI (US)
20th February 2026
14AQI (US)
21st February 2026
27AQI (US)
22nd February 2026
48AQI (US)
23rd February 2026
66AQI (US)
24th February 2026
79AQI (US)
25th February 2026
33AQI (US)
26th February 2026
44AQI (US)
27th February 2026
69AQI (US)
28th February 2026
67AQI (US)
1st March 2026
80AQI (US)
2nd March 2026
74AQI (US)
3rd March 2026
44AQI (US)
4th March 2026
60AQI (US)
5th March 2026
84AQI (US)
6th March 2026
99AQI (US)
7th March 2026
76AQI (US)
8th March 2026
84AQI (US)
9th March 2026
69AQI (US)
10th March 2026
72AQI (US)
11th March 2026
49AQI (US)
12th March 2026
34AQI (US)
13th March 2026
14th March 2026
15th March 2026
16th March 2026
17th March 2026
18th March 2026
19th March 2026
20th March 2026
21st March 2026
22nd March 2026
23rd March 2026
24th March 2026
25th March 2026
26th March 2026
27th March 2026
28th March 2026
29th March 2026
30th March 2026
31st March 2026
1st April 2026
2nd April 2026
3rd April 2026
4th April 2026
5th April 2026
6th April 2026
7th April 2026
8th April 2026
9th April 2026
10th April 2026
11th April 2026
12th April 2026
13th April 2026
14th April 2026
15th April 2026
16th April 2026
17th April 2026
18th April 2026
19th April 2026
20th April 2026
21st April 2026
22nd April 2026
23rd April 2026
24th April 2026
25th April 2026
26th April 2026
27th April 2026
28th April 2026
29th April 2026
30th April 2026
1st May 2026
2nd May 2026
3rd May 2026
4th May 2026
5th May 2026
6th May 2026
7th May 2026
8th May 2026
9th May 2026
10th May 2026
11th May 2026
12th May 2026
13th May 2026
14th May 2026
15th May 2026
16th May 2026
17th May 2026
18th May 2026
19th May 2026
20th May 2026
21st May 2026
22nd May 2026
23rd May 2026
24th May 2026
25th May 2026
26th May 2026
27th May 2026
28th May 2026
29th May 2026
30th May 2026
31st May 2026
1st June 2026
2nd June 2026
3rd June 2026
4th June 2026
5th June 2026
6th June 2026
7th June 2026
8th June 2026
9th June 2026
10th June 2026
11th June 2026
12th June 2026
13th June 2026
14th June 2026
15th June 2026
16th June 2026
17th June 2026
18th June 2026
19th June 2026
20th June 2026
21st June 2026
22nd June 2026
23rd June 2026
24th June 2026
25th June 2026
26th June 2026
27th June 2026
28th June 2026
29th June 2026
30th June 2026
1st July 2026
2nd July 2026
3rd July 2026
4th July 2026
5th July 2026
6th July 2026
7th July 2026
8th July 2026
9th July 2026
10th July 2026
11th July 2026
12th July 2026
13th July 2026
14th July 2026
15th July 2026
16th July 2026
17th July 2026
18th July 2026
19th July 2026
20th July 2026
21st July 2026
22nd July 2026
23rd July 2026
24th July 2026
25th July 2026
26th July 2026
27th July 2026
28th July 2026
29th July 2026
30th July 2026
31st July 2026
1st August 2026
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026

52AQI (US)

35AQI (US)

69AQI (US)

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202648AQI (US)

17
12
2
24
4
3
9
44
25
2

Highest AQI (US) recorded in

March

69AQI (US)

Lowest AQI (US) recorded in

February

35AQI (US)

202545AQI (US)

14
15
2
6
18
3
1
22
9
26
4
29
2
14
16
31
24
7
29
1
16
15
25
2
2
1
17
12
2
253
101
9
2

Highest AQI (US) recorded in

February

72AQI (US)

Lowest AQI (US) recorded in

September

29AQI (US)

202448AQI (US)

10
13
8
13
9
6
1
21
10
24
6
29
2
25
4
1
23
8
19
12
23
7
24
7
15
14
1
20
11
246
103
16
1

Highest AQI (US) recorded in

January

69AQI (US)

Lowest AQI (US) recorded in

October

36AQI (US)

202349AQI (US)

20
7
3
1
7
9
11
1
24
7
28
2
26
5
22
8
24
7
17
14
23
7
20
11
23
5
1
14
12
3
2
248
94
18
4

Highest AQI (US) recorded in

February

91AQI (US)

Lowest AQI (US) recorded in

April

38AQI (US)

202252AQI (US)

11
16
4
13
7
1
3
26
2
14
3
23
8
18
12
16
7
1
1
1
28
15
12
4
24
5
1
16
8
6
1
182
105
18
2

Highest AQI (US) recorded in

March

69AQI (US)

Lowest AQI (US) recorded in

September

33AQI (US)

202137AQI (US)

30
26
2
31
30
31
29
1
20
11
25
6
22
8
26
4
1
22
7
1
20
9
2
312
48
4

Highest AQI (US) recorded in

December

49AQI (US)

Lowest AQI (US) recorded in

January

22AQI (US)

202031AQI (US)

10
1
2
21
18
30
28
1
31
30
31
30
31
260
2
2

Highest AQI (US) recorded in

March

52AQI (US)

Lowest AQI (US) recorded in

December

22AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2022(Avg.)
52AQI (US)
Least Polluted Year Recorded
2020(Avg.)
31AQI (US)

Koper's annual 2026 AQI (US) (48) shows an average percentage change of 13.8% (worsened AQI (US)) compared to previous years: 2020 (31), 2021 (37), 2022 (52), 2023 (49), 2024 (48), 2025 (45).