Harstad, Troms, Norway Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Harstad, Troms, Norway
AQI Trends: Highest and Lowest
Same Day Analysis (29th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 17 of Good air quality, showing improvement over 2025 and 2022 on the same day.
Day & Night AQI Trend: 29th Sep - 30th Sep 2026
Harstad, Troms, Norway
6 AM29th Sep 2026
7 PM
5 AM30th Sep 2026
21AQI
12AQI
19AQI
12AQI
In the last 24 hours,
Harstad's AQI reached its highest point of 21 at 8 AM during the Day, while the lowest point, 12, was recorded at 4 AM during the Night between 29th Sep and 30th Sep 2026.
Day & Night AQI Trend : Sep 2026
Harstad, Troms, Norway
9°C9/10°C
9°C7/10°C
9°C8/10°C
9°C8/11°C
8°C6/9°C
6°C5/8°C
9°C7/12°C
10°C8/12°C
9°C8/11°C
9°C7/12°C
10°C7/13°C
11°C9/12°C
9°C7/11°C
8°C7/10°C
10°C7/13°C
9°C9/11°C
7°C6/9°C
6°C5/8°C
7°C5/10°C
8°C6/10°C
7°C6/8°C
8°C6/10°C
9°C8/10°C
8°C7/9°C
7°C6/9°C
8°C7/10°C
8°C6/10°C
9°C9/11°C
9°C8/10°C
9°C7/10°C
15AQI
13AQI
17AQI
14AQI
2026 Days Vs Air Quality
Harstad, Troms, Norway
99%
267
0.7%
2
Total number of days with different AQI categories in last 273 days in 2026 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2026, 99% of 273 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Harstad, Troms, Norway
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI (US)
31AQI (US)
28AQI (US)
32AQI (US)
12AQI (US)
32AQI (US)
40AQI (US)
21AQI (US)
22AQI (US)
26AQI (US)
31AQI (US)
12AQI (US)
14AQI (US)
23AQI (US)
18AQI (US)
19AQI (US)
30AQI (US)
19AQI (US)
24AQI (US)
33AQI (US)
34AQI (US)
34AQI (US)
34AQI (US)
47AQI (US)
16AQI (US)
18AQI (US)
23AQI (US)
25AQI (US)
41AQI (US)
41AQI (US)
7AQI (US)
17AQI (US)
39AQI (US)
36AQI (US)
30AQI (US)
28AQI (US)
49AQI (US)
43AQI (US)
33AQI (US)
11AQI (US)
22AQI (US)
25AQI (US)
31AQI (US)
19AQI (US)
13AQI (US)
17AQI (US)
25AQI (US)
13AQI (US)
18AQI (US)
18AQI (US)
16AQI (US)
16AQI (US)
27AQI (US)
28AQI (US)
30AQI (US)
19AQI (US)
18AQI (US)
28AQI (US)
28AQI (US)
35AQI (US)
39AQI (US)
36AQI (US)
28AQI (US)
30AQI (US)
23AQI (US)
17AQI (US)
13AQI (US)
26AQI (US)
26AQI (US)
31AQI (US)
25AQI (US)
10AQI (US)
13AQI (US)
18AQI (US)
35AQI (US)
15AQI (US)
10AQI (US)
21AQI (US)
32AQI (US)
32AQI (US)
27AQI (US)
35AQI (US)
20AQI (US)
23AQI (US)
31AQI (US)
18AQI (US)
12AQI (US)
16AQI (US)
33AQI (US)
14AQI (US)
15AQI (US)
13AQI (US)
18AQI (US)
26AQI (US)
15AQI (US)
26AQI (US)
44AQI (US)
50AQI (US)
48AQI (US)
58AQI (US)
43AQI (US)
35AQI (US)
49AQI (US)
48AQI (US)
59AQI (US)
41AQI (US)
26AQI (US)
22AQI (US)
38AQI (US)
31AQI (US)
21AQI (US)
12AQI (US)
16AQI (US)
19AQI (US)
21AQI (US)
13AQI (US)
15AQI (US)
11AQI (US)
16AQI (US)
16AQI (US)
16AQI (US)
19AQI (US)
18AQI (US)
16AQI (US)
15AQI (US)
17AQI (US)
14AQI (US)
17AQI (US)
12AQI (US)
13AQI (US)
14AQI (US)
21AQI (US)
36AQI (US)
40AQI (US)
34AQI (US)
33AQI (US)
32AQI (US)
36AQI (US)
33AQI (US)
39AQI (US)
50AQI (US)
43AQI (US)
28AQI (US)
11AQI (US)
18AQI (US)
17AQI (US)
12AQI (US)
19AQI (US)
23AQI (US)
27AQI (US)
34AQI (US)
25AQI (US)
19AQI (US)
10AQI (US)
11AQI (US)
15AQI (US)
19AQI (US)
19AQI (US)
8AQI (US)
12AQI (US)
19AQI (US)
14AQI (US)
15AQI (US)
20AQI (US)
17AQI (US)
16AQI (US)
19AQI (US)
20AQI (US)
19AQI (US)
17AQI (US)
16AQI (US)
16AQI (US)
19AQI (US)
23AQI (US)
24AQI (US)
21AQI (US)
22AQI (US)
11AQI (US)
12AQI (US)
21AQI (US)
23AQI (US)
16AQI (US)
14AQI (US)
19AQI (US)
12AQI (US)
13AQI (US)
18AQI (US)
21AQI (US)
21AQI (US)
20AQI (US)
22AQI (US)
20AQI (US)
19AQI (US)
22AQI (US)
39AQI (US)
21AQI (US)
12AQI (US)
16AQI (US)
21AQI (US)
21AQI (US)
15AQI (US)
22AQI (US)
24AQI (US)
22AQI (US)
23AQI (US)
26AQI (US)
10AQI (US)
15AQI (US)
17AQI (US)
10AQI (US)
9AQI (US)
9AQI (US)
6AQI (US)
18AQI (US)
10AQI (US)
10AQI (US)
6AQI (US)
9AQI (US)
15AQI (US)
6AQI (US)
5AQI (US)
12AQI (US)
19AQI (US)
21AQI (US)
10AQI (US)
8AQI (US)
7AQI (US)
9AQI (US)
12AQI (US)
19AQI (US)
16AQI (US)
12AQI (US)
13AQI (US)
19AQI (US)
14AQI (US)
13AQI (US)
22AQI (US)
22AQI (US)
15AQI (US)
12AQI (US)
9AQI (US)
8AQI (US)
8AQI (US)
9AQI (US)
7AQI (US)
8AQI (US)
10AQI (US)
19AQI (US)
12AQI (US)
16AQI (US)
18AQI (US)
26AQI (US)
20AQI (US)
11AQI (US)
13AQI (US)
14AQI (US)
8AQI (US)
15AQI (US)
18AQI (US)
18AQI (US)
14AQI (US)
10AQI (US)
21AQI (US)
23AQI (US)
18AQI (US)
18AQI (US)
17AQI (US)
20AQI (US)
17AQI (US)
26AQI (US)
25AQI (US)
24AQI (US)
30AQI (US)
24AQI (US)
18AQI (US)
19AQI (US)
13AQI (US)
15AQI (US)
No. of days
202621AQI (US)
Highest AQI (US) recorded in
April30AQI (US)
Lowest AQI (US) recorded in
August13AQI (US)
202525AQI (US)
Highest AQI (US) recorded in
October35AQI (US)
Lowest AQI (US) recorded in
September19AQI (US)
202422AQI (US)
Highest AQI (US) recorded in
April32AQI (US)
Lowest AQI (US) recorded in
October13AQI (US)
202322AQI (US)
Highest AQI (US) recorded in
April34AQI (US)
Lowest AQI (US) recorded in
September13AQI (US)
202222AQI (US)
Highest AQI (US) recorded in
November29AQI (US)
Lowest AQI (US) recorded in
September14AQI (US)
202120AQI (US)
Highest AQI (US) recorded in
December33AQI (US)
Lowest AQI (US) recorded in
September12AQI (US)
202017AQI (US)
Highest AQI (US) recorded in
October29AQI (US)
Lowest AQI (US) recorded in
March9AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Harstad's annual 2026 AQI (US) (21) shows an average percentage change of -0.1% (improved AQI (US)) compared to previous years: 2020 (17), 2021 (20), 2022 (22), 2023 (22), 2024 (22), 2025 (25).