Kostroma, Kostromskaya Oblast, Russia Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Kostroma, Kostromskaya Oblast, Russia
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 1st highest AQI at 53 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
Kostroma, Kostromskaya Oblast, Russia
5 AM3rd Oct 2025
6 PM
4 AM4th Oct 2025
63AQI
46AQI
66AQI
46AQI
In the last 24 hours,
Kostroma's AQI reached its highest point of 66 at 11 PM during the Night, while the lowest point, 46, was recorded at 2 PM during the Day between 3rd Oct and 4th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Kostroma, Kostromskaya Oblast, Russia
15°C9/19°C
16°C12/21°C
16°C11/22°C
16°C11/22°C
17°C11/23°C
14°C10/19°C
14°C8/20°C
14°C10/20°C
12°C7/17°C
11°C6/17°C
12°C7/19°C
13°C7/20°C
14°C9/21°C
14°C8/20°C
14°C9/20°C
13°C11/18°C
12°C11/16°C
15°C12/19°C
19°C13/26°C
12°C8/15°C
7°C4/10°C
7°C4/10°C
8°C2/13°C
8°C5/11°C
6°C2/9°C
6°C2/10°C
5°C1/11°C
6°C1/12°C
7°C2/12°C
7°C3/12°C
--°C/°C
40AQI
33AQI
40AQI
37AQI
2025 Days Vs Air Quality
Kostroma, Kostromskaya Oblast, Russia
73%
201
27%
75
Total number of days with different AQI categories in last 277 days in 2025 (88 days remaining)
Under WHO’s Safe Air Quality Limits: 73%
Health Risk Level:
Low
In 2025, 73% of 277 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Kostroma, Kostromskaya Oblast, Russia
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
46AQI
41AQI
43AQI
50AQI
61AQI
66AQI
43AQI
48AQI
42AQI
55AQI
60AQI
63AQI
77AQI
68AQI
47AQI
66AQI
55AQI
35AQI
26AQI
23AQI
32AQI
35AQI
43AQI
45AQI
42AQI
56AQI
47AQI
40AQI
51AQI
46AQI
45AQI
54AQI
55AQI
40AQI
62AQI
54AQI
55AQI
55AQI
54AQI
60AQI
58AQI
51AQI
54AQI
54AQI
46AQI
39AQI
45AQI
38AQI
42AQI
36AQI
41AQI
34AQI
32AQI
53AQI
52AQI
58AQI
67AQI
64AQI
76AQI
59AQI
61AQI
54AQI
37AQI
32AQI
32AQI
39AQI
50AQI
41AQI
55AQI
58AQI
72AQI
71AQI
55AQI
56AQI
64AQI
56AQI
60AQI
56AQI
54AQI
54AQI
50AQI
40AQI
54AQI
50AQI
56AQI
62AQI
50AQI
62AQI
61AQI
70AQI
67AQI
57AQI
44AQI
46AQI
36AQI
30AQI
38AQI
41AQI
29AQI
25AQI
33AQI
24AQI
26AQI
39AQI
40AQI
38AQI
51AQI
49AQI
57AQI
51AQI
51AQI
51AQI
56AQI
34AQI
42AQI
49AQI
37AQI
35AQI
28AQI
26AQI
28AQI
14AQI
21AQI
15AQI
15AQI
13AQI
13AQI
18AQI
18AQI
16AQI
14AQI
16AQI
19AQI
16AQI
16AQI
15AQI
16AQI
20AQI
20AQI
12AQI
14AQI
12AQI
12AQI
13AQI
13AQI
14AQI
13AQI
14AQI
15AQI
14AQI
19AQI
16AQI
12AQI
14AQI
15AQI
14AQI
15AQI
20AQI
20AQI
27AQI
22AQI
17AQI
22AQI
21AQI
17AQI
18AQI
19AQI
17AQI
17AQI
17AQI
20AQI
15AQI
12AQI
13AQI
14AQI
16AQI
15AQI
15AQI
15AQI
17AQI
16AQI
14AQI
14AQI
15AQI
17AQI
15AQI
16AQI
16AQI
18AQI
22AQI
20AQI
21AQI
24AQI
22AQI
22AQI
23AQI
20AQI
20AQI
18AQI
17AQI
17AQI
20AQI
20AQI
19AQI
22AQI
21AQI
24AQI
26AQI
27AQI
32AQI
38AQI
53AQI
51AQI
57AQI
52AQI
52AQI
40AQI
38AQI
34AQI
27AQI
24AQI
26AQI
28AQI
34AQI
30AQI
29AQI
34AQI
37AQI
31AQI
26AQI
39AQI
39AQI
32AQI
31AQI
38AQI
33AQI
39AQI
39AQI
40AQI
44AQI
51AQI
54AQI
47AQI
49AQI
54AQI
56AQI
40AQI
51AQI
54AQI
56AQI
55AQI
55AQI
53AQI
50AQI
45AQI
45AQI
50AQI
45AQI
46AQI
41AQI
34AQI
33AQI
31AQI
25AQI
36AQI
21AQI
18AQI
18AQI
19AQI
13AQI
7AQI
17AQI
17AQI
27AQI
52AQI
53AQI
48AQI
51AQI
54AQI
41AQI
16AQI
17AQI
22AQI
38AQI
38AQI
44AQI
No. of days
202536AQI
Highest AQI recorded in
March54AQI
Lowest AQI recorded in
May16AQI
202419AQI
Highest AQI recorded in
December52AQI
Lowest AQI recorded in
April9AQI
202315AQI
Highest AQI recorded in
February26AQI
Lowest AQI recorded in
October10AQI
202226AQI
Highest AQI recorded in
October57AQI
Lowest AQI recorded in
November20AQI
Most & Least Polluted Years Over the Last 4 Years
Kostroma's annual 2025 AQI (36) shows an average percentage change of 88.7% (worsened AQI) compared to previous years: 2022 (26), 2023 (15), 2024 (19).