San Jose, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
San Jose, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (13th July):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 30 of Good air quality, showing improvement over 2025 and 2024 on the same day.
Day & Night AQI Trend: 12th Jul - 13th Jul 2026
San Jose, California, United States
5 AM12th Jul 2026
8 PM
4 AM13th Jul 2026
32AQI
10AQI
34AQI
23AQI
In the last 24 hours,
San Jose's AQI reached its highest point of 34 at 2 AM during the Night, while the lowest point, 10, was recorded at 6 AM during the Day between 12th Jul and 13th Jul 2026.
Day & Night AQI Trend : Jun - Jul 2026
San Jose, California, United States
22°C15/32°C
21°C15/31°C
20°C15/30°C
22°C14/32°C
21°C14/31°C
19°C13/27°C
20°C15/28°C
20°C14/29°C
19°C14/28°C
19°C14/29°C
20°C14/29°C
20°C14/28°C
17°C12/24°C
18°C15/24°C
19°C10/29°C
21°C12/32°C
21°C13/32°C
19°C12/30°C
20°C12/30°C
20°C12/31°C
21°C14/32°C
20°C13/32°C
20°C14/30°C
17°C13/24°C
18°C12/27°C
20°C12/31°C
19°C13/29°C
20°C12/31°C
24°C15/36°C
25°C18/39°C
29AQI
23AQI
25AQI
24AQI
2026 Days Vs Air Quality
San Jose, California, United States
89%
170
11%
21
Total number of days with different AQI categories in last 194 days in 2026 (171 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2026, 89% of 194 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 Jose, California, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
28AQI (US)
12AQI (US)
14AQI (US)
12AQI (US)
22AQI (US)
16AQI (US)
30AQI (US)
16AQI (US)
22AQI (US)
46AQI (US)
52AQI (US)
53AQI (US)
57AQI (US)
62AQI (US)
60AQI (US)
61AQI (US)
59AQI (US)
64AQI (US)
56AQI (US)
48AQI (US)
52AQI (US)
46AQI (US)
51AQI (US)
48AQI (US)
43AQI (US)
45AQI (US)
42AQI (US)
49AQI (US)
54AQI (US)
51AQI (US)
40AQI (US)
45AQI (US)
47AQI (US)
48AQI (US)
47AQI (US)
46AQI (US)
42AQI (US)
36AQI (US)
44AQI (US)
46AQI (US)
46AQI (US)
44AQI (US)
45AQI (US)
51AQI (US)
52AQI (US)
43AQI (US)
44AQI (US)
52AQI (US)
43AQI (US)
44AQI (US)
40AQI (US)
34AQI (US)
35AQI (US)
40AQI (US)
44AQI (US)
42AQI (US)
34AQI (US)
31AQI (US)
33AQI (US)
40AQI (US)
51AQI (US)
43AQI (US)
44AQI (US)
38AQI (US)
34AQI (US)
35AQI (US)
34AQI (US)
36AQI (US)
33AQI (US)
36AQI (US)
36AQI (US)
36AQI (US)
33AQI (US)
33AQI (US)
35AQI (US)
33AQI (US)
32AQI (US)
32AQI (US)
36AQI (US)
32AQI (US)
33AQI (US)
36AQI (US)
36AQI (US)
32AQI (US)
33AQI (US)
32AQI (US)
32AQI (US)
27AQI (US)
27AQI (US)
26AQI (US)
33AQI (US)
33AQI (US)
27AQI (US)
29AQI (US)
26AQI (US)
30AQI (US)
28AQI (US)
37AQI (US)
29AQI (US)
34AQI (US)
36AQI (US)
30AQI (US)
34AQI (US)
34AQI (US)
32AQI (US)
32AQI (US)
32AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
27AQI (US)
28AQI (US)
29AQI (US)
33AQI (US)
28AQI (US)
25AQI (US)
24AQI (US)
26AQI (US)
27AQI (US)
23AQI (US)
21AQI (US)
29AQI (US)
34AQI (US)
33AQI (US)
29AQI (US)
30AQI (US)
32AQI (US)
35AQI (US)
33AQI (US)
31AQI (US)
29AQI (US)
44AQI (US)
51AQI (US)
57AQI (US)
57AQI (US)
55AQI (US)
49AQI (US)
39AQI (US)
48AQI (US)
48AQI (US)
45AQI (US)
42AQI (US)
27AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
31AQI (US)
31AQI (US)
29AQI (US)
25AQI (US)
27AQI (US)
24AQI (US)
24AQI (US)
26AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
26AQI (US)
25AQI (US)
23AQI (US)
26AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
24AQI (US)
23AQI (US)
22AQI (US)
25AQI (US)
24AQI (US)
24AQI (US)
25AQI (US)
27AQI (US)
29AQI (US)
25AQI (US)
23AQI (US)
26AQI (US)
26AQI (US)
27AQI (US)
28AQI (US)
24AQI (US)
22AQI (US)
28AQI (US)
30AQI (US)
26AQI (US)
28AQI (US)
32AQI (US)
30AQI (US)
26AQI (US)
30AQI (US)
42AQI (US)
43AQI (US)
35AQI (US)
30AQI (US)
36AQI (US)
26AQI (US)
27AQI (US)
No. of days
202635AQI (US)
Highest AQI (US) recorded in
February43AQI (US)
Lowest AQI (US) recorded in
June26AQI (US)
202540AQI (US)
Highest AQI (US) recorded in
January50AQI (US)
Lowest AQI (US) recorded in
July30AQI (US)
202435AQI (US)
Highest AQI (US) recorded in
December54AQI (US)
Lowest AQI (US) recorded in
March23AQI (US)
202333AQI (US)
Highest AQI (US) recorded in
December50AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202239AQI (US)
Highest AQI (US) recorded in
January50AQI (US)
Lowest AQI (US) recorded in
July27AQI (US)
202140AQI (US)
Highest AQI (US) recorded in
August49AQI (US)
Lowest AQI (US) recorded in
June32AQI (US)
202045AQI (US)
Highest AQI (US) recorded in
September73AQI (US)
Lowest AQI (US) recorded in
June28AQI (US)
Most & Least Polluted Years Over the Last 7 Years
San Jose's annual 2026 AQI (US) (35) shows an average percentage change of -8.5% (improved AQI (US)) compared to previous years: 2020 (45), 2021 (40), 2022 (39), 2023 (33), 2024 (35), 2025 (40).