Gridley, 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
Gridley, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (10th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 43 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 9th Oct - 10th Oct 2025
Gridley, California, United States
6 AM9th Oct 2025
6 PM
5 AM10th Oct 2025
50AQI
42AQI
70AQI
21AQI
In the last 24 hours,
Gridley's AQI reached its highest point of 70 at 7 PM during the Night, while the lowest point, 21, was recorded at 4 AM during the Night between 9th Oct and 10th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Gridley, California, United States
--°C/°C
22°C16/30°C
25°C16/34°C
25°C16/35°C
24°C14/34°C
26°C16/37°C
27°C17/39°C
28°C18/40°C
28°C20/37°C
22°C19/25°C
25°C16/34°C
26°C17/36°C
26°C17/37°C
26°C16/39°C
25°C16/34°C
25°C18/34°C
25°C15/38°C
25°C17/35°C
20°C16/25°C
21°C18/28°C
20°C17/26°C
19°C16/25°C
18°C14/24°C
17°C14/22°C
18°C12/28°C
19°C11/29°C
21°C13/33°C
21°C12/33°C
20°C11/31°C
19°C14/26°C
19°C14/26°C
36AQI
31AQI
40AQI
32AQI
2025 Days Vs Air Quality
Gridley, California, United States
95%
270
5%
13
Total number of days with different AQI categories in last 284 days in 2025 (81 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 284 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
Gridley, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
53AQI
32AQI
38AQI
22AQI
27AQI
27AQI
18AQI
20AQI
29AQI
45AQI
30AQI
21AQI
23AQI
26AQI
41AQI
52AQI
50AQI
62AQI
56AQI
39AQI
33AQI
46AQI
57AQI
55AQI
35AQI
33AQI
23AQI
46AQI
56AQI
71AQI
51AQI
30AQI
21AQI
20AQI
20AQI
23AQI
38AQI
21AQI
21AQI
23AQI
25AQI
30AQI
40AQI
26AQI
24AQI
24AQI
26AQI
24AQI
27AQI
23AQI
25AQI
21AQI
39AQI
28AQI
27AQI
20AQI
25AQI
34AQI
30AQI
32AQI
21AQI
19AQI
20AQI
24AQI
19AQI
23AQI
26AQI
31AQI
30AQI
26AQI
22AQI
18AQI
17AQI
29AQI
34AQI
15AQI
16AQI
18AQI
15AQI
18AQI
18AQI
17AQI
25AQI
37AQI
27AQI
17AQI
24AQI
20AQI
29AQI
20AQI
18AQI
17AQI
22AQI
22AQI
23AQI
30AQI
17AQI
18AQI
34AQI
26AQI
26AQI
29AQI
29AQI
26AQI
45AQI
35AQI
23AQI
27AQI
29AQI
33AQI
33AQI
36AQI
44AQI
43AQI
22AQI
25AQI
17AQI
23AQI
30AQI
31AQI
24AQI
32AQI
22AQI
27AQI
25AQI
21AQI
26AQI
24AQI
27AQI
25AQI
22AQI
21AQI
17AQI
18AQI
21AQI
26AQI
29AQI
22AQI
18AQI
17AQI
27AQI
28AQI
19AQI
31AQI
26AQI
18AQI
24AQI
34AQI
26AQI
33AQI
39AQI
44AQI
48AQI
41AQI
41AQI
41AQI
35AQI
30AQI
28AQI
25AQI
32AQI
43AQI
48AQI
47AQI
40AQI
39AQI
38AQI
36AQI
33AQI
32AQI
39AQI
20AQI
16AQI
19AQI
24AQI
23AQI
27AQI
31AQI
33AQI
32AQI
29AQI
31AQI
31AQI
37AQI
35AQI
56AQI
35AQI
28AQI
31AQI
25AQI
38AQI
59AQI
58AQI
47AQI
39AQI
33AQI
28AQI
26AQI
22AQI
27AQI
22AQI
30AQI
19AQI
20AQI
18AQI
22AQI
20AQI
20AQI
23AQI
28AQI
32AQI
38AQI
40AQI
36AQI
34AQI
33AQI
31AQI
39AQI
30AQI
28AQI
34AQI
32AQI
36AQI
40AQI
37AQI
29AQI
41AQI
25AQI
17AQI
25AQI
24AQI
27AQI
35AQI
42AQI
50AQI
37AQI
36AQI
41AQI
46AQI
40AQI
38AQI
35AQI
36AQI
32AQI
44AQI
37AQI
32AQI
27AQI
36AQI
30AQI
25AQI
16AQI
19AQI
23AQI
33AQI
39AQI
32AQI
29AQI
37AQI
41AQI
42AQI
43AQI
50AQI
35AQI
37AQI
40AQI
48AQI
36AQI
42AQI
47AQI
30AQI
27AQI
25AQI
15AQI
41AQI
25AQI
36AQI
38AQI
14AQI
41AQI
54AQI
45AQI
43AQI
39AQI
26AQI
23AQI
28AQI
25AQI
34AQI
32AQI
35AQI
34AQI
35AQI
No. of days
202531AQI
Highest AQI recorded in
January39AQI
Lowest AQI recorded in
March23AQI
202427AQI
Highest AQI recorded in
December38AQI
Lowest AQI recorded in
March14AQI
202330AQI
Highest AQI recorded in
December45AQI
Lowest AQI recorded in
March13AQI
202226AQI
Highest AQI recorded in
January50AQI
Lowest AQI recorded in
May11AQI
202137AQI
Highest AQI recorded in
August74AQI
Lowest AQI recorded in
May25AQI
202049AQI
Highest AQI recorded in
September98AQI
Lowest AQI recorded in
May18AQI
Most & Least Polluted Years Over the Last 6 Years
Gridley's annual 2025 AQI (31) shows an average percentage change of -3.3% (improved AQI) compared to previous years: 2020 (49), 2021 (37), 2022 (26), 2023 (30), 2024 (27).