Upas Court, 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!
March Air Quality Analysis
Upas Court, Fontana, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (7th March):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 35 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 6th Mar - 7th Mar 2026
Upas Court, Fontana, California, United States
6 AM6th Mar 2026
5 PM
5 AM7th Mar 2026
56AQI
22AQI
28AQI
13AQI
In the last 24 hours,
Upas Court's AQI reached its highest point of 56 at 11 AM during the Day, while the lowest point, 13, was recorded at 2 AM during the Night between 6th Mar and 7th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
Upas Court, Fontana, California, United States
17°C12/22°C
18°C10/28°C
22°C16/30°C
20°C13/29°C
15°C11/21°C
13°C10/15°C
13°C9/19°C
15°C10/23°C
13°C8/20°C
13°C9/18°C
10°C8/13°C
9°C7/13°C
9°C6/14°C
8°C5/12°C
9°C4/16°C
12°C4/22°C
16°C9/24°C
20°C12/29°C
20°C13/30°C
20°C13/30°C
22°C13/34°C
27°C21/36°C
24°C18/34°C
22°C16/32°C
18°C13/24°C
17°C9/29°C
15°C10/22°C
17°C11/24°C
17°C12/24°C
18°C11/25°C
61AQI
28AQI
32AQI
24AQI
2026 Days Vs Air Quality
Upas Court, Fontana, California, United States
85%
56
15%
10
Total number of days with different AQI categories in last 67 days in 2026 (298 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2026, 85% of 67 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
Upas Court, 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)
35AQI (US)
36AQI (US)
40AQI (US)
39AQI (US)
No. of days
202638AQI (US)
Highest AQI (US) recorded in
February40AQI (US)
Lowest AQI (US) recorded in
January36AQI (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
Upas Court's annual 2026 AQI (US) (38) shows an average percentage change of -26.6% (improved AQI (US)) compared to previous years: 2025 (51).