Alameda, 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
Alameda, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (14th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 53 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 13th Feb - 14th Feb 2026
Alameda, California, United States
7 AM13th Feb 2026
5 PM
6 AM14th Feb 2026
65AQI
49AQI
54AQI
27AQI
In the last 24 hours,
Alameda's AQI reached its highest point of 65 at 5 PM during the Day, while the lowest point, 27, was recorded at 4 AM during the Night between 13th Feb and 14th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Alameda, California, United States
13°C9/19°C
12°C9/16°C
13°C10/18°C
11°C6/20°C
11°C7/19°C
11°C8/19°C
12°C8/19°C
11°C9/14°C
11°C6/19°C
10°C5/16°C
11°C6/19°C
11°C6/18°C
14°C10/20°C
13°C6/22°C
13°C7/23°C
12°C6/22°C
12°C7/19°C
12°C6/22°C
14°C6/24°C
14°C6/25°C
15°C9/25°C
14°C11/23°C
13°C9/19°C
13°C9/18°C
14°C9/22°C
12°C8/17°C
12°C11/14°C
13°C9/19°C
11°C7/15°C
10°C8/13°C
62AQI
48AQI
47AQI
43AQI
2026 Days Vs Air Quality
Alameda, California, United States
69%
31
31%
14
Total number of days with different AQI categories in last 46 days in 2026 (319 days remaining)
Under WHO’s Safe Air Quality Limits: 69%
Health Risk Level:
Moderate
In 2026, 69% of 46 days were within WHO’s safe air quality limits, and 31% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Alameda, California, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI (US)
20AQI (US)
21AQI (US)
29AQI (US)
22AQI (US)
14AQI (US)
29AQI (US)
18AQI (US)
20AQI (US)
46AQI (US)
63AQI (US)
49AQI (US)
65AQI (US)
66AQI (US)
69AQI (US)
54AQI (US)
58AQI (US)
68AQI (US)
59AQI (US)
47AQI (US)
56AQI (US)
48AQI (US)
51AQI (US)
47AQI (US)
46AQI (US)
46AQI (US)
43AQI (US)
49AQI (US)
55AQI (US)
51AQI (US)
41AQI (US)
45AQI (US)
48AQI (US)
48AQI (US)
47AQI (US)
46AQI (US)
42AQI (US)
36AQI (US)
46AQI (US)
48AQI (US)
47AQI (US)
46AQI (US)
48AQI (US)
52AQI (US)
53AQI (US)
44AQI (US)
47AQI (US)
No. of days
202645AQI (US)
Highest AQI (US) recorded in
February47AQI (US)
Lowest AQI (US) recorded in
January44AQI (US)
202537AQI (US)
Highest AQI (US) recorded in
December51AQI (US)
Lowest AQI (US) recorded in
July25AQI (US)
202433AQI (US)
Highest AQI (US) recorded in
December51AQI (US)
Lowest AQI (US) recorded in
March25AQI (US)
202335AQI (US)
Highest AQI (US) recorded in
December45AQI (US)
Lowest AQI (US) recorded in
March25AQI (US)
202238AQI (US)
Highest AQI (US) recorded in
August49AQI (US)
Lowest AQI (US) recorded in
July27AQI (US)
202134AQI (US)
Highest AQI (US) recorded in
September43AQI (US)
Lowest AQI (US) recorded in
February25AQI (US)
202041AQI (US)
Highest AQI (US) recorded in
September70AQI (US)
Lowest AQI (US) recorded in
June27AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Alameda's annual 2026 AQI (US) (45) shows an average percentage change of 25.2% (worsened AQI (US)) compared to previous years: 2020 (41), 2021 (34), 2022 (38), 2023 (35), 2024 (33), 2025 (37).