San Bernardino, 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 Bernardino, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (27th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 62 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 27th Oct - 28th Oct 2025
San Bernardino, California, United States
6 AM27th Oct 2025
6 PM
5 AM28th Oct 2025
80AQI
51AQI
70AQI
53AQI
In the last 24 hours,
San Bernardino's AQI reached its highest point of 80 at 11 AM during the Day, while the lowest point, 51, was recorded at 6 PM during the Day between 27th Oct and 28th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
San Bernardino, California, United States
22°C17/31°C
22°C15/32°C
22°C18/30°C
22°C14/32°C
22°C14/33°C
19°C14/29°C
20°C12/30°C
21°C13/33°C
20°C12/32°C
21°C12/33°C
20°C13/32°C
21°C13/32°C
26°C18/37°C
24°C17/33°C
21°C10/34°C
16°C12/20°C
15°C13/18°C
16°C12/22°C
18°C9/29°C
21°C13/32°C
22°C12/33°C
22°C14/33°C
22°C13/35°C
22°C14/35°C
18°C13/25°C
18°C12/28°C
21°C12/33°C
19°C12/29°C
18°C12/26°C
19°C11/30°C
--°C/°C
56AQI
48AQI
52AQI
47AQI
2025 Days Vs Air Quality
San Bernardino, California, United States
73%
157
27%
59
Total number of days with different AQI categories in last 301 days in 2025 (64 days remaining)
Under WHO’s Safe Air Quality Limits: 73%
Health Risk Level:
Low
In 2025, 73% of 301 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 Bernardino, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI
35AQI
31AQI
37AQI
39AQI
26AQI
25AQI
33AQI
29AQI
25AQI
27AQI
22AQI
31AQI
40AQI
47AQI
51AQI
50AQI
50AQI
52AQI
52AQI
49AQI
37AQI
29AQI
29AQI
32AQI
36AQI
45AQI
51AQI
43AQI
39AQI
39AQI
24AQI
22AQI
27AQI
36AQI
46AQI
49AQI
42AQI
43AQI
26AQI
30AQI
32AQI
34AQI
45AQI
43AQI
40AQI
38AQI
45AQI
30AQI
34AQI
41AQI
49AQI
39AQI
37AQI
40AQI
44AQI
47AQI
54AQI
54AQI
49AQI
46AQI
44AQI
45AQI
47AQI
45AQI
46AQI
49AQI
41AQI
33AQI
35AQI
35AQI
38AQI
39AQI
43AQI
42AQI
46AQI
47AQI
48AQI
51AQI
50AQI
52AQI
55AQI
56AQI
57AQI
55AQI
54AQI
50AQI
51AQI
51AQI
48AQI
48AQI
44AQI
52AQI
52AQI
47AQI
43AQI
41AQI
58AQI
54AQI
46AQI
43AQI
68AQI
51AQI
45AQI
49AQI
42AQI
43AQI
49AQI
52AQI
46AQI
42AQI
37AQI
41AQI
31AQI
32AQI
35AQI
40AQI
37AQI
33AQI
27AQI
34AQI
29AQI
25AQI
27AQI
29AQI
34AQI
38AQI
48AQI
45AQI
47AQI
51AQI
57AQI
60AQI
60AQI
56AQI
54AQI
54AQI
57AQI
54AQI
53AQI
55AQI
60AQI
51AQI
46AQI
39AQI
40AQI
41AQI
41AQI
50AQI
65AQI
51AQI
54AQI
56AQI
50AQI
44AQI
44AQI
39AQI
41AQI
46AQI
44AQI
41AQI
54AQI
70AQI
43AQI
44AQI
37AQI
29AQI
30AQI
34AQI
35AQI
38AQI
45AQI
54AQI
51AQI
51AQI
40AQI
36AQI
32AQI
31AQI
31AQI
32AQI
36AQI
42AQI
41AQI
36AQI
30AQI
32AQI
33AQI
37AQI
54AQI
47AQI
47AQI
50AQI
53AQI
56AQI
69AQI
67AQI
71AQI
58AQI
52AQI
47AQI
54AQI
40AQI
48AQI
40AQI
51AQI
46AQI
45AQI
53AQI
58AQI
49AQI
39AQI
50AQI
61AQI
62AQI
62AQI
33AQI
37AQI
42AQI
47AQI
41AQI
50AQI
40AQI
53AQI
No. of days
202544AQI
Highest AQI recorded in
October53AQI
Lowest AQI recorded in
March33AQI
Most & Least Polluted Years Over the Last 1 Years
San Bernardino's annual 2025 AQI (44) shows an average percentage change of NaN% (improved AQI) compared to previous years: .