Weather in Fontana, California, United States in September
In an average September, Fontana sees a daily high around 90°F and a low around 62°F, based on 1981–2026 of local climate records.
| Average high | 90°F |
|---|---|
| Typical high range | 79°F to 99°F |
| Average low | 62°F |
| Typical low range | 54°F to 70°F |
| Average daily precipitation | 0.00 in |
September records
The most extreme September on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
114°F
2020-09-06
Lowest
61°F
1983-09-30
Low
Highest
84°F
2020-09-06
Lowest
43°F
1982-09-30
Feels-like
Highest
123°F
2022-09-05
Lowest
38°F
1982-09-30
Humidity
Highest
16.9 g/m³
1984-09-10
Lowest
2.7 g/m³
1993-09-26
Wind
Highest
19 mph
2005-09-28
Lowest
4 mph
2012-09-12
Precip
Wettest
1.87 in
1983
Driest
0.00 in
2020
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