French Valley, California, United States 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
French Valley, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 3rd highest AQI at 33 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 29th Sep - 30th Sep 2025
French Valley, California, United States
6 AM29th Sep 2025
6 PM
5 AM30th Sep 2025
51AQI
15AQI
44AQI
28AQI
In the last 24 hours,
French Valley's AQI reached its highest point of 51 at 3 PM during the Day, while the lowest point, 15, was recorded at 6 AM during the Day between 29th Sep and 30th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
French Valley, California, United States
27°C19/39°C
28°C19/39°C
27°C20/39°C
27°C21/38°C
26°C19/37°C
24°C18/35°C
24°C17/36°C
25°C18/37°C
24°C16/34°C
20°C13/30°C
18°C14/23°C
19°C14/28°C
18°C12/27°C
20°C14/29°C
21°C14/32°C
24°C16/35°C
27°C19/39°C
23°C19/31°C
22°C18/28°C
22°C17/30°C
22°C16/33°C
23°C17/34°C
25°C19/34°C
26°C19/38°C
25°C19/34°C
22°C17/31°C
19°C17/25°C
20°C17/29°C
22°C18/30°C
21°C14/30°C
--°C/°C
36AQI
33AQI
35AQI
33AQI
2025 Days Vs Air Quality
French Valley, California, United States
81%
221
18%
50
0.3%
1
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 81%
Health Risk Level:
Low
In 2025, 81% of 273 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
French Valley, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
50AQI
40AQI
40AQI
53AQI
40AQI
33AQI
40AQI
52AQI
36AQI
35AQI
47AQI
30AQI
30AQI
28AQI
30AQI
28AQI
35AQI
45AQI
54AQI
51AQI
33AQI
33AQI
33AQI
33AQI
55AQI
37AQI
35AQI
38AQI
42AQI
48AQI
55AQI
51AQI
51AQI
40AQI
43AQI
29AQI
27AQI
23AQI
28AQI
35AQI
35AQI
32AQI
31AQI
25AQI
30AQI
31AQI
29AQI
35AQI
36AQI
35AQI
39AQI
29AQI
31AQI
38AQI
38AQI
42AQI
37AQI
31AQI
31AQI
36AQI
33AQI
33AQI
28AQI
35AQI
39AQI
29AQI
28AQI
33AQI
29AQI
29AQI
27AQI
22AQI
20AQI
23AQI
34AQI
33AQI
28AQI
22AQI
21AQI
25AQI
30AQI
38AQI
35AQI
40AQI
30AQI
29AQI
27AQI
35AQI
35AQI
27AQI
31AQI
43AQI
23AQI
26AQI
27AQI
28AQI
33AQI
43AQI
37AQI
40AQI
46AQI
46AQI
44AQI
46AQI
43AQI
38AQI
26AQI
35AQI
42AQI
35AQI
43AQI
42AQI
41AQI
36AQI
35AQI
28AQI
23AQI
25AQI
39AQI
37AQI
41AQI
40AQI
37AQI
32AQI
27AQI
31AQI
34AQI
47AQI
44AQI
45AQI
43AQI
50AQI
33AQI
36AQI
43AQI
47AQI
46AQI
38AQI
43AQI
46AQI
48AQI
51AQI
53AQI
51AQI
46AQI
46AQI
46AQI
47AQI
48AQI
46AQI
54AQI
46AQI
35AQI
35AQI
32AQI
32AQI
42AQI
43AQI
41AQI
38AQI
45AQI
49AQI
51AQI
52AQI
50AQI
49AQI
55AQI
58AQI
59AQI
56AQI
54AQI
53AQI
52AQI
52AQI
54AQI
52AQI
49AQI
51AQI
45AQI
46AQI
44AQI
86AQI
71AQI
64AQI
45AQI
49AQI
47AQI
47AQI
54AQI
45AQI
43AQI
53AQI
50AQI
48AQI
48AQI
40AQI
51AQI
32AQI
36AQI
40AQI
40AQI
47AQI
36AQI
32AQI
35AQI
27AQI
25AQI
28AQI
32AQI
35AQI
45AQI
60AQI
62AQI
45AQI
48AQI
60AQI
63AQI
61AQI
61AQI
54AQI
68AQI
65AQI
59AQI
59AQI
59AQI
122AQI
51AQI
36AQI
38AQI
33AQI
33AQI
45AQI
73AQI
80AQI
52AQI
54AQI
57AQI
43AQI
35AQI
40AQI
33AQI
38AQI
44AQI
52AQI
38AQI
42AQI
43AQI
42AQI
40AQI
35AQI
26AQI
41AQI
33AQI
30AQI
31AQI
38AQI
42AQI
38AQI
34AQI
44AQI
35AQI
31AQI
22AQI
29AQI
27AQI
36AQI
35AQI
32AQI
24AQI
25AQI
28AQI
33AQI
40AQI
34AQI
30AQI
36AQI
43AQI
47AQI
45AQI
54AQI
35AQI
No. of days
202541AQI
Highest AQI recorded in
August54AQI
Lowest AQI recorded in
March30AQI
202441AQI
Highest AQI recorded in
September47AQI
Lowest AQI recorded in
March17AQI
202328AQI
Highest AQI recorded in
December29AQI
Lowest AQI recorded in
November19AQI
202238AQI
Highest AQI recorded in
April44AQI
Lowest AQI recorded in
January33AQI
202142AQI
Highest AQI recorded in
August50AQI
Lowest AQI recorded in
January34AQI
202045AQI
Highest AQI recorded in
September60AQI
Lowest AQI recorded in
March31AQI
Most & Least Polluted Years Over the Last 6 Years
French Valley's annual 2025 AQI (41) shows an average percentage change of 7.7% (worsened AQI) compared to previous years: 2020 (45), 2021 (42), 2022 (38), 2023 (28), 2024 (41).