Willows, California, United States 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
Willows, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (2nd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks the most lowest AQI at 23 of Good air quality, showing improvement over 2024, 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 1st Oct - 2nd Oct 2025
Willows, California, United States
6 AM1st Oct 2025
7 PM
5 AM2nd Oct 2025
30AQI
6AQI
33AQI
6AQI
In the last 24 hours,
Willows's AQI reached its highest point of 33 at 11 PM during the Night, while the lowest point, 6, was recorded at 9 PM during the Night between 1st Oct and 2nd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Willows, California, United States
--°C/°C
29°C21/39°C
28°C19/39°C
23°C12/34°C
22°C14/33°C
22°C13/32°C
21°C14/29°C
21°C15/29°C
19°C17/24°C
22°C16/30°C
25°C17/33°C
25°C16/34°C
23°C15/33°C
26°C17/35°C
27°C17/37°C
28°C19/38°C
28°C21/37°C
21°C19/22°C
25°C17/33°C
25°C17/34°C
26°C17/36°C
28°C18/39°C
24°C18/32°C
24°C17/33°C
26°C15/37°C
24°C16/33°C
20°C14/27°C
20°C17/26°C
19°C15/25°C
18°C14/23°C
18°C13/24°C
44AQI
37AQI
44AQI
41AQI
2025 Days Vs Air Quality
Willows, California, United States
95%
262
5%
13
Total number of days with different AQI categories in last 276 days in 2025 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 276 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
Willows, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
50AQI
31AQI
39AQI
24AQI
27AQI
27AQI
27AQI
26AQI
29AQI
42AQI
31AQI
24AQI
26AQI
26AQI
49AQI
43AQI
43AQI
43AQI
48AQI
34AQI
36AQI
34AQI
38AQI
49AQI
40AQI
31AQI
29AQI
52AQI
60AQI
67AQI
56AQI
43AQI
24AQI
23AQI
22AQI
29AQI
28AQI
25AQI
23AQI
28AQI
28AQI
30AQI
34AQI
29AQI
28AQI
28AQI
30AQI
28AQI
27AQI
28AQI
26AQI
25AQI
34AQI
31AQI
29AQI
24AQI
25AQI
27AQI
28AQI
31AQI
25AQI
23AQI
24AQI
24AQI
24AQI
28AQI
28AQI
33AQI
31AQI
29AQI
26AQI
20AQI
18AQI
32AQI
34AQI
17AQI
21AQI
22AQI
16AQI
19AQI
19AQI
19AQI
24AQI
30AQI
24AQI
18AQI
21AQI
17AQI
31AQI
25AQI
20AQI
18AQI
19AQI
24AQI
23AQI
28AQI
15AQI
18AQI
21AQI
21AQI
35AQI
22AQI
26AQI
23AQI
34AQI
40AQI
27AQI
29AQI
34AQI
38AQI
26AQI
30AQI
43AQI
50AQI
37AQI
32AQI
23AQI
19AQI
26AQI
28AQI
25AQI
39AQI
26AQI
26AQI
23AQI
27AQI
48AQI
49AQI
46AQI
37AQI
36AQI
19AQI
16AQI
19AQI
23AQI
24AQI
27AQI
25AQI
21AQI
19AQI
26AQI
25AQI
20AQI
32AQI
30AQI
21AQI
28AQI
35AQI
34AQI
38AQI
41AQI
39AQI
46AQI
44AQI
38AQI
40AQI
39AQI
37AQI
31AQI
33AQI
35AQI
45AQI
50AQI
50AQI
44AQI
41AQI
40AQI
37AQI
36AQI
34AQI
41AQI
26AQI
23AQI
24AQI
27AQI
32AQI
31AQI
38AQI
31AQI
37AQI
34AQI
36AQI
41AQI
41AQI
32AQI
49AQI
33AQI
27AQI
28AQI
23AQI
39AQI
62AQI
62AQI
52AQI
45AQI
41AQI
33AQI
30AQI
26AQI
31AQI
25AQI
32AQI
22AQI
21AQI
23AQI
29AQI
23AQI
22AQI
32AQI
35AQI
32AQI
36AQI
40AQI
37AQI
35AQI
41AQI
38AQI
37AQI
38AQI
38AQI
37AQI
36AQI
41AQI
42AQI
40AQI
25AQI
40AQI
24AQI
22AQI
23AQI
30AQI
28AQI
33AQI
44AQI
51AQI
45AQI
38AQI
43AQI
47AQI
39AQI
40AQI
36AQI
35AQI
25AQI
38AQI
39AQI
42AQI
30AQI
36AQI
36AQI
32AQI
18AQI
22AQI
29AQI
40AQI
44AQI
37AQI
35AQI
47AQI
48AQI
47AQI
49AQI
52AQI
50AQI
43AQI
38AQI
53AQI
68AQI
54AQI
60AQI
46AQI
38AQI
35AQI
16AQI
23AQI
38AQI
28AQI
24AQI
28AQI
29AQI
37AQI
34AQI
37AQI
41AQI
20AQI
No. of days
202533AQI
Highest AQI recorded in
September41AQI
Lowest AQI recorded in
October20AQI
202433AQI
Highest AQI recorded in
October41AQI
Lowest AQI recorded in
January25AQI
202353AQI
Highest AQI recorded in
October129AQI
Lowest AQI recorded in
March29AQI
202232AQI
Highest AQI recorded in
September41AQI
Lowest AQI recorded in
January27AQI
202141AQI
Highest AQI recorded in
August87AQI
Lowest AQI recorded in
November20AQI
202056AQI
Highest AQI recorded in
September116AQI
Lowest AQI recorded in
March29AQI
Most & Least Polluted Years Over the Last 6 Years
Willows's annual 2025 AQI (33) shows an average percentage change of -19.2% (improved AQI) compared to previous years: 2020 (56), 2021 (41), 2022 (32), 2023 (53), 2024 (33).