San Diego, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
February Air Quality Analysis
San Diego, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (17th February):
On this day, AQI across the 1 years varied significantly: 2026 ranks 1st highest AQI at 27 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 16th Feb - 17th Feb 2026
San Diego, California, United States
6 AM16th Feb 2026
5 PM
5 AM17th Feb 2026
81AQI
28AQI
30AQI
9AQI
In the last 24 hours,
San Diego's AQI reached its highest point of 81 at 11 AM during the Day, while the lowest point, 9, was recorded at 8 PM during the Night between 16th Feb and 17th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
San Diego, California, United States
17°C10/28°C
15°C10/21°C
15°C13/18°C
15°C11/21°C
16°C14/21°C
15°C12/18°C
15°C9/22°C
17°C11/27°C
16°C9/26°C
15°C9/25°C
18°C10/29°C
19°C13/30°C
20°C13/30°C
18°C12/30°C
15°C11/23°C
18°C11/28°C
20°C12/32°C
18°C15/24°C
17°C15/20°C
16°C12/20°C
19°C12/31°C
19°C12/30°C
16°C15/17°C
15°C13/17°C
15°C12/20°C
15°C12/20°C
14°C10/20°C
15°C11/20°C
13°C11/18°C
14°C10/17°C
60AQI
30AQI
34AQI
29AQI
2026 Days Vs Air Quality
San Diego, California, United States
96%
46
4%
2
Total number of days with different AQI categories in last 49 days in 2026 (316 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2026, 96% of 49 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 Diego, California, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI (US)
20AQI (US)
16AQI (US)
13AQI (US)
21AQI (US)
30AQI (US)
31AQI (US)
33AQI (US)
23AQI (US)
25AQI (US)
29AQI (US)
29AQI (US)
30AQI (US)
41AQI (US)
36AQI (US)
42AQI (US)
35AQI (US)
32AQI (US)
42AQI (US)
52AQI (US)
71AQI (US)
49AQI (US)
38AQI (US)
24AQI (US)
31AQI (US)
31AQI (US)
24AQI (US)
36AQI (US)
41AQI (US)
48AQI (US)
32AQI (US)
42AQI (US)
44AQI (US)
44AQI (US)
38AQI (US)
42AQI (US)
42AQI (US)
36AQI (US)
34AQI (US)
38AQI (US)
42AQI (US)
23AQI (US)
22AQI (US)
31AQI (US)
39AQI (US)
38AQI (US)
38AQI (US)
27AQI (US)
33AQI (US)
36AQI (US)
No. of days
202634AQI (US)
Highest AQI (US) recorded in
February36AQI (US)
Lowest AQI (US) recorded in
January33AQI (US)
202548AQI (US)
Highest AQI (US) recorded in
December58AQI (US)
Lowest AQI (US) recorded in
March33AQI (US)
Most & Least Polluted Years Over the Last 2 Years
San Diego's annual 2026 AQI (US) (34) shows an average percentage change of -28.5% (improved AQI (US)) compared to previous years: 2025 (48).