Leon, Castille Leon, Spain 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
Leon, Castille Leon, Spain
AQI Trends: Highest and Lowest
Same Day Analysis (25th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 30 of Good air quality, showing improvement over 2024 and 2023 on the same day.
Day & Night AQI Trend: 24th Sep - 25th Sep 2026
Leon, Castille Leon, Spain
7 AM24th Sep 2026
8 PM
6 AM25th Sep 2026
35AQI
24AQI
39AQI
22AQI
In the last 24 hours,
Leon's AQI reached its highest point of 39 at 11 PM during the Night, while the lowest point, 22, was recorded at 7 AM during the Night between 24th Sep and 25th Sep 2026.
Day & Night AQI Trend : Aug - Sep 2026
Leon, Castille Leon, Spain
13°C11/17°C
13°C8/20°C
17°C10/26°C
19°C14/26°C
18°C12/25°C
19°C13/27°C
22°C15/30°C
24°C16/33°C
26°C18/35°C
26°C20/32°C
24°C18/33°C
23°C17/32°C
19°C15/27°C
16°C10/23°C
16°C11/24°C
19°C13/27°C
20°C13/28°C
21°C14/30°C
24°C16/32°C
23°C16/32°C
16°C11/22°C
14°C7/23°C
15°C9/22°C
18°C11/26°C
20°C14/28°C
21°C15/30°C
21°C14/31°C
22°C15/30°C
22°C15/32°C
21°C15/30°C
33AQI
29AQI
34AQI
30AQI
2026 Days Vs Air Quality
Leon, Castille Leon, Spain
94%
250
6%
15
Total number of days with different AQI categories in last 268 days in 2026 (97 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2026, 94% of 268 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
Leon, Castille Leon, Spain
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
41AQI (US)
40AQI (US)
46AQI (US)
23AQI (US)
27AQI (US)
27AQI (US)
34AQI (US)
37AQI (US)
14AQI (US)
19AQI (US)
36AQI (US)
28AQI (US)
25AQI (US)
21AQI (US)
26AQI (US)
30AQI (US)
27AQI (US)
18AQI (US)
27AQI (US)
36AQI (US)
24AQI (US)
24AQI (US)
38AQI (US)
35AQI (US)
36AQI (US)
40AQI (US)
27AQI (US)
31AQI (US)
38AQI (US)
39AQI (US)
35AQI (US)
35AQI (US)
30AQI (US)
35AQI (US)
35AQI (US)
29AQI (US)
33AQI (US)
30AQI (US)
32AQI (US)
45AQI (US)
25AQI (US)
30AQI (US)
33AQI (US)
20AQI (US)
36AQI (US)
32AQI (US)
20AQI (US)
23AQI (US)
27AQI (US)
24AQI (US)
26AQI (US)
37AQI (US)
42AQI (US)
53AQI (US)
56AQI (US)
61AQI (US)
72AQI (US)
50AQI (US)
18AQI (US)
30AQI (US)
50AQI (US)
54AQI (US)
62AQI (US)
56AQI (US)
11AQI (US)
16AQI (US)
22AQI (US)
23AQI (US)
19AQI (US)
32AQI (US)
34AQI (US)
29AQI (US)
10AQI (US)
17AQI (US)
23AQI (US)
33AQI (US)
44AQI (US)
45AQI (US)
49AQI (US)
54AQI (US)
65AQI (US)
61AQI (US)
52AQI (US)
45AQI (US)
15AQI (US)
20AQI (US)
20AQI (US)
26AQI (US)
26AQI (US)
16AQI (US)
19AQI (US)
18AQI (US)
22AQI (US)
33AQI (US)
43AQI (US)
30AQI (US)
43AQI (US)
39AQI (US)
42AQI (US)
49AQI (US)
27AQI (US)
13AQI (US)
16AQI (US)
20AQI (US)
20AQI (US)
18AQI (US)
18AQI (US)
22AQI (US)
38AQI (US)
57AQI (US)
22AQI (US)
37AQI (US)
21AQI (US)
27AQI (US)
29AQI (US)
24AQI (US)
38AQI (US)
28AQI (US)
29AQI (US)
37AQI (US)
18AQI (US)
16AQI (US)
20AQI (US)
25AQI (US)
30AQI (US)
26AQI (US)
25AQI (US)
22AQI (US)
21AQI (US)
17AQI (US)
17AQI (US)
22AQI (US)
36AQI (US)
36AQI (US)
38AQI (US)
38AQI (US)
38AQI (US)
39AQI (US)
45AQI (US)
43AQI (US)
43AQI (US)
38AQI (US)
34AQI (US)
35AQI (US)
30AQI (US)
36AQI (US)
22AQI (US)
13AQI (US)
13AQI (US)
17AQI (US)
20AQI (US)
15AQI (US)
11AQI (US)
18AQI (US)
12AQI (US)
18AQI (US)
10AQI (US)
13AQI (US)
19AQI (US)
15AQI (US)
16AQI (US)
20AQI (US)
20AQI (US)
39AQI (US)
37AQI (US)
37AQI (US)
50AQI (US)
35AQI (US)
34AQI (US)
39AQI (US)
38AQI (US)
37AQI (US)
43AQI (US)
21AQI (US)
44AQI (US)
17AQI (US)
11AQI (US)
15AQI (US)
13AQI (US)
14AQI (US)
16AQI (US)
14AQI (US)
16AQI (US)
23AQI (US)
39AQI (US)
47AQI (US)
25AQI (US)
24AQI (US)
23AQI (US)
33AQI (US)
27AQI (US)
23AQI (US)
21AQI (US)
19AQI (US)
24AQI (US)
28AQI (US)
26AQI (US)
31AQI (US)
28AQI (US)
27AQI (US)
31AQI (US)
45AQI (US)
28AQI (US)
31AQI (US)
35AQI (US)
42AQI (US)
69AQI (US)
65AQI (US)
41AQI (US)
35AQI (US)
27AQI (US)
30AQI (US)
30AQI (US)
29AQI (US)
29AQI (US)
29AQI (US)
31AQI (US)
37AQI (US)
29AQI (US)
37AQI (US)
46AQI (US)
46AQI (US)
59AQI (US)
32AQI (US)
24AQI (US)
32AQI (US)
41AQI (US)
49AQI (US)
38AQI (US)
28AQI (US)
33AQI (US)
27AQI (US)
35AQI (US)
32AQI (US)
33AQI (US)
29AQI (US)
29AQI (US)
34AQI (US)
26AQI (US)
28AQI (US)
29AQI (US)
30AQI (US)
32AQI (US)
41AQI (US)
41AQI (US)
39AQI (US)
32AQI (US)
30AQI (US)
27AQI (US)
35AQI (US)
33AQI (US)
35AQI (US)
31AQI (US)
30AQI (US)
35AQI (US)
28AQI (US)
31AQI (US)
26AQI (US)
28AQI (US)
31AQI (US)
37AQI (US)
32AQI (US)
30AQI (US)
29AQI (US)
30AQI (US)
31AQI (US)
35AQI (US)
34AQI (US)
29AQI (US)
30AQI (US)
24AQI (US)
30AQI (US)
34AQI (US)
32AQI (US)
No. of days
202631AQI (US)
Highest AQI (US) recorded in
February35AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202531AQI (US)
Highest AQI (US) recorded in
August44AQI (US)
Lowest AQI (US) recorded in
April19AQI (US)
202432AQI (US)
Highest AQI (US) recorded in
February43AQI (US)
Lowest AQI (US) recorded in
October25AQI (US)
202334AQI (US)
Highest AQI (US) recorded in
February46AQI (US)
Lowest AQI (US) recorded in
July28AQI (US)
202237AQI (US)
Highest AQI (US) recorded in
January52AQI (US)
Lowest AQI (US) recorded in
September29AQI (US)
202129AQI (US)
Highest AQI (US) recorded in
November40AQI (US)
Lowest AQI (US) recorded in
October22AQI (US)
202026AQI (US)
Highest AQI (US) recorded in
March38AQI (US)
Lowest AQI (US) recorded in
December23AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Leon's annual 2026 AQI (US) (31) shows an average percentage change of -0.3% (improved AQI (US)) compared to previous years: 2020 (26), 2021 (29), 2022 (37), 2023 (34), 2024 (32), 2025 (31).