Fontana, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
June Air Quality Analysis
Fontana, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (2nd June):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 45 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 1st Jun - 2nd Jun 2026
Fontana, California, United States
5 AM1st Jun 2026
7 PM
4 AM2nd Jun 2026
52AQI
29AQI
52AQI
26AQI
In the last 24 hours,
Fontana's AQI reached its highest point of 52 at 7 PM during the Day, while the lowest point, 26, was recorded at 2 AM during the Night between 1st Jun and 2nd Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Fontana, California, United States
15°C11/21°C
14°C10/20°C
17°C9/29°C
21°C12/33°C
20°C11/32°C
22°C12/34°C
22°C13/35°C
25°C14/38°C
20°C14/28°C
19°C13/28°C
19°C11/29°C
18°C13/28°C
17°C14/26°C
17°C12/24°C
20°C11/31°C
22°C12/33°C
22°C15/30°C
23°C14/34°C
20°C13/31°C
19°C12/30°C
19°C14/29°C
18°C11/29°C
16°C11/23°C
15°C12/21°C
16°C9/24°C
17°C12/24°C
20°C10/32°C
23°C13/35°C
22°C14/33°C
21°C13/32°C
55AQI
35AQI
42AQI
31AQI
2026 Days Vs Air Quality
Fontana, California, United States
88%
132
12%
18
Total number of days with different AQI categories in last 153 days in 2026 (212 days remaining)
Under WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2026, 88% of 153 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
Fontana, California, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI (US)
38AQI (US)
20AQI (US)
26AQI (US)
24AQI (US)
32AQI (US)
35AQI (US)
33AQI (US)
27AQI (US)
22AQI (US)
21AQI (US)
21AQI (US)
27AQI (US)
25AQI (US)
34AQI (US)
33AQI (US)
23AQI (US)
31AQI (US)
49AQI (US)
38AQI (US)
56AQI (US)
62AQI (US)
52AQI (US)
37AQI (US)
40AQI (US)
43AQI (US)
41AQI (US)
46AQI (US)
51AQI (US)
54AQI (US)
40AQI (US)
54AQI (US)
52AQI (US)
55AQI (US)
50AQI (US)
52AQI (US)
45AQI (US)
42AQI (US)
35AQI (US)
51AQI (US)
44AQI (US)
32AQI (US)
28AQI (US)
34AQI (US)
37AQI (US)
38AQI (US)
40AQI (US)
43AQI (US)
32AQI (US)
31AQI (US)
26AQI (US)
28AQI (US)
29AQI (US)
37AQI (US)
39AQI (US)
42AQI (US)
43AQI (US)
38AQI (US)
31AQI (US)
34AQI (US)
50AQI (US)
34AQI (US)
42AQI (US)
47AQI (US)
31AQI (US)
34AQI (US)
31AQI (US)
30AQI (US)
32AQI (US)
42AQI (US)
48AQI (US)
40AQI (US)
36AQI (US)
31AQI (US)
37AQI (US)
33AQI (US)
43AQI (US)
49AQI (US)
57AQI (US)
39AQI (US)
34AQI (US)
46AQI (US)
44AQI (US)
46AQI (US)
47AQI (US)
46AQI (US)
31AQI (US)
30AQI (US)
38AQI (US)
36AQI (US)
22AQI (US)
18AQI (US)
33AQI (US)
28AQI (US)
29AQI (US)
38AQI (US)
43AQI (US)
46AQI (US)
42AQI (US)
33AQI (US)
25AQI (US)
22AQI (US)
20AQI (US)
23AQI (US)
36AQI (US)
29AQI (US)
39AQI (US)
36AQI (US)
33AQI (US)
26AQI (US)
29AQI (US)
29AQI (US)
30AQI (US)
24AQI (US)
19AQI (US)
27AQI (US)
34AQI (US)
31AQI (US)
39AQI (US)
43AQI (US)
27AQI (US)
33AQI (US)
31AQI (US)
31AQI (US)
39AQI (US)
45AQI (US)
35AQI (US)
45AQI (US)
37AQI (US)
38AQI (US)
34AQI (US)
50AQI (US)
49AQI (US)
59AQI (US)
66AQI (US)
57AQI (US)
53AQI (US)
53AQI (US)
55AQI (US)
52AQI (US)
47AQI (US)
43AQI (US)
31AQI (US)
23AQI (US)
19AQI (US)
18AQI (US)
21AQI (US)
27AQI (US)
37AQI (US)
45AQI (US)
36AQI (US)
40AQI (US)
39AQI (US)
30AQI (US)
40AQI (US)
41AQI (US)
No. of days
202637AQI (US)
Highest AQI (US) recorded in
June41AQI (US)
Lowest AQI (US) recorded in
April30AQI (US)
202551AQI (US)
Highest AQI (US) recorded in
December61AQI (US)
Lowest AQI (US) recorded in
March39AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Fontana's annual 2026 AQI (US) (37) shows an average percentage change of -27.4% (improved AQI (US)) compared to previous years: 2025 (51).