San Rafael, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
San Rafael, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (13th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 23 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: 13th Aug - 14th Aug 2025
San Rafael, California, United States
6 AM13th Aug 2025
8 PM
5 AM14th Aug 2025
27AQI
17AQI
24AQI
14AQI
In the last 24 hours,
San Rafael's AQI reached its highest point of 27 at 6 PM during the Day, while the lowest point, 14, was recorded at 5 AM during the Night between 13th Aug and 14th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
San Rafael, California, United States
15°C12/18°C
15°C14/18°C
17°C14/22°C
17°C14/22°C
17°C13/22°C
16°C13/21°C
16°C13/18°C
16°C14/20°C
16°C14/20°C
17°C14/21°C
16°C14/20°C
16°C14/19°C
16°C14/20°C
17°C13/24°C
16°C12/22°C
16°C13/21°C
18°C13/24°C
17°C14/24°C
17°C13/25°C
17°C12/24°C
17°C12/24°C
16°C11/24°C
19°C11/30°C
18°C13/26°C
17°C12/25°C
17°C12/24°C
17°C13/24°C
16°C11/22°C
17°C14/22°C
17°C14/22°C
--°C/°C
21AQI
18AQI
24AQI
20AQI
2025 Days Vs Air Quality
San Rafael, California, United States
99%
223
0.8%
2
Total number of days with different AQI categories in last 226 days in 2025 (139 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2025, 99% of 226 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
San Rafael, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
45AQI
36AQI
40AQI
31AQI
34AQI
30AQI
37AQI
26AQI
37AQI
43AQI
33AQI
25AQI
30AQI
26AQI
45AQI
49AQI
39AQI
43AQI
45AQI
34AQI
40AQI
44AQI
44AQI
57AQI
44AQI
41AQI
35AQI
40AQI
35AQI
32AQI
34AQI
27AQI
24AQI
23AQI
25AQI
25AQI
24AQI
25AQI
24AQI
26AQI
26AQI
28AQI
26AQI
29AQI
29AQI
27AQI
27AQI
23AQI
25AQI
23AQI
24AQI
25AQI
29AQI
24AQI
22AQI
25AQI
30AQI
31AQI
41AQI
34AQI
31AQI
25AQI
24AQI
24AQI
28AQI
25AQI
28AQI
33AQI
27AQI
28AQI
30AQI
22AQI
24AQI
51AQI
34AQI
18AQI
18AQI
20AQI
19AQI
23AQI
22AQI
30AQI
20AQI
25AQI
20AQI
19AQI
23AQI
22AQI
20AQI
20AQI
25AQI
20AQI
19AQI
20AQI
20AQI
17AQI
14AQI
16AQI
19AQI
21AQI
20AQI
31AQI
33AQI
24AQI
24AQI
25AQI
19AQI
20AQI
27AQI
26AQI
32AQI
32AQI
43AQI
31AQI
19AQI
21AQI
21AQI
22AQI
24AQI
32AQI
31AQI
20AQI
18AQI
26AQI
23AQI
34AQI
30AQI
20AQI
25AQI
22AQI
24AQI
16AQI
17AQI
28AQI
27AQI
36AQI
22AQI
26AQI
25AQI
19AQI
35AQI
23AQI
20AQI
26AQI
19AQI
16AQI
24AQI
23AQI
19AQI
24AQI
41AQI
48AQI
43AQI
29AQI
42AQI
23AQI
17AQI
19AQI
17AQI
18AQI
22AQI
38AQI
43AQI
42AQI
44AQI
48AQI
34AQI
31AQI
29AQI
38AQI
37AQI
38AQI
36AQI
36AQI
23AQI
19AQI
26AQI
30AQI
29AQI
23AQI
19AQI
20AQI
19AQI
32AQI
30AQI
32AQI
30AQI
20AQI
19AQI
17AQI
18AQI
26AQI
25AQI
20AQI
17AQI
16AQI
18AQI
16AQI
16AQI
18AQI
18AQI
22AQI
14AQI
15AQI
16AQI
15AQI
15AQI
16AQI
18AQI
26AQI
24AQI
23AQI
22AQI
21AQI
32AQI
31AQI
28AQI
32AQI
23AQI
33AQI
29AQI
23AQI
24AQI
25AQI
23AQI
38AQI
26AQI
25AQI
24AQI
24AQI
31AQI
20AQI
27AQI
No. of days
202527AQI
Highest AQI recorded in
January38AQI
Lowest AQI recorded in
July20AQI
202429AQI
Highest AQI recorded in
December44AQI
Lowest AQI recorded in
September22AQI
202329AQI
Highest AQI recorded in
February34AQI
Lowest AQI recorded in
June25AQI
202232AQI
Highest AQI recorded in
December42AQI
Lowest AQI recorded in
July25AQI
202133AQI
Highest AQI recorded in
September41AQI
Lowest AQI recorded in
July26AQI
202036AQI
Highest AQI recorded in
September64AQI
Lowest AQI recorded in
July25AQI
Most & Least Polluted Years Over the Last 6 Years
San Rafael's annual 2025 AQI (27) shows an average percentage change of -14.3% (improved AQI) compared to previous years: 2020 (36), 2021 (33), 2022 (32), 2023 (29), 2024 (29).