San Martin, 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
San Martin, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (29th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 41 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 29th Oct - 30th Oct 2025
San Martin, California, United States
7 AM29th Oct 2025
6 PM
6 AM30th Oct 2025
56AQI
28AQI
58AQI
30AQI
In the last 24 hours,
San Martin's AQI reached its highest point of 58 at 2 AM during the Night, while the lowest point, 28, was recorded at 9 AM during the Day between 29th Oct and 30th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
San Martin, California, United States
18°C15/24°C
19°C15/28°C
19°C15/24°C
17°C13/23°C
17°C10/27°C
19°C12/29°C
21°C15/32°C
22°C15/34°C
17°C13/22°C
17°C12/24°C
17°C11/25°C
16°C11/23°C
16°C10/26°C
13°C9/18°C
12°C10/16°C
13°C10/16°C
14°C9/21°C
18°C11/27°C
21°C15/30°C
19°C12/29°C
20°C13/30°C
19°C13/30°C
16°C13/21°C
16°C10/24°C
15°C10/24°C
14°C10/17°C
15°C10/21°C
14°C9/21°C
18°C11/27°C
21°C14/29°C
--°C/°C
38AQI
32AQI
42AQI
27AQI
2025 Days Vs Air Quality
San Martin, California, United States
89%
194
11%
24
Total number of days with different AQI categories in last 303 days in 2025 (62 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 303 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
San Martin, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI
24AQI
28AQI
22AQI
24AQI
20AQI
20AQI
18AQI
22AQI
26AQI
25AQI
32AQI
23AQI
18AQI
23AQI
29AQI
23AQI
28AQI
33AQI
38AQI
35AQI
35AQI
30AQI
32AQI
40AQI
37AQI
35AQI
35AQI
38AQI
42AQI
29AQI
22AQI
22AQI
30AQI
40AQI
45AQI
42AQI
43AQI
28AQI
36AQI
43AQI
45AQI
48AQI
47AQI
39AQI
41AQI
29AQI
29AQI
23AQI
26AQI
31AQI
36AQI
35AQI
32AQI
40AQI
31AQI
41AQI
38AQI
32AQI
34AQI
30AQI
24AQI
26AQI
37AQI
32AQI
51AQI
54AQI
48AQI
50AQI
48AQI
53AQI
51AQI
44AQI
46AQI
40AQI
37AQI
44AQI
45AQI
52AQI
48AQI
42AQI
40AQI
42AQI
40AQI
45AQI
50AQI
48AQI
40AQI
36AQI
37AQI
35AQI
36AQI
38AQI
45AQI
49AQI
45AQI
41AQI
42AQI
42AQI
50AQI
38AQI
52AQI
43AQI
43AQI
37AQI
38AQI
40AQI
54AQI
55AQI
52AQI
47AQI
46AQI
41AQI
35AQI
37AQI
38AQI
35AQI
32AQI
24AQI
25AQI
24AQI
25AQI
23AQI
23AQI
28AQI
36AQI
33AQI
33AQI
30AQI
30AQI
28AQI
37AQI
29AQI
34AQI
37AQI
41AQI
53AQI
49AQI
43AQI
47AQI
41AQI
34AQI
41AQI
28AQI
17AQI
27AQI
33AQI
40AQI
52AQI
56AQI
59AQI
51AQI
45AQI
51AQI
51AQI
50AQI
46AQI
44AQI
46AQI
42AQI
55AQI
50AQI
39AQI
41AQI
41AQI
31AQI
26AQI
25AQI
21AQI
28AQI
36AQI
41AQI
27AQI
31AQI
50AQI
57AQI
65AQI
54AQI
53AQI
46AQI
43AQI
52AQI
55AQI
44AQI
48AQI
47AQI
25AQI
30AQI
32AQI
21AQI
16AQI
30AQI
41AQI
35AQI
43AQI
49AQI
43AQI
31AQI
41AQI
34AQI
28AQI
43AQI
30AQI
19AQI
35AQI
35AQI
55AQI
44AQI
29AQI
50AQI
41AQI
46AQI
43AQI
25AQI
37AQI
23AQI
34AQI
41AQI
25AQI
30AQI
36AQI
44AQI
38AQI
41AQI
41AQI
36AQI
No. of days
202538AQI
Highest AQI recorded in
June44AQI
Lowest AQI recorded in
March25AQI
Most & Least Polluted Years Over the Last 1 Years
San Martin's annual 2025 AQI (38) shows an average percentage change of NaN% (improved AQI) compared to previous years: .