Fontana weather records
Record high and low temperatures for Fontana, by month, by season, and all-time, with the dates they occurred, across 1980–2026 of daily climate history. Its hottest day on record reached 115°F on 2020-09-06; its coldest fell to 25°F on 1990-12-23.
Records by month
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have ever been in each calendar month, so each column shows its record high and its record low. Tap a month for its full averages and typical range.
| Month | Daytime high | Overnight low |
|---|---|---|
| January | 85°F2021-01-15
45°F1999-01-26
|
58°F2018-01-08
25°F2007-01-14
|
| February | 89°F2026-02-27
43°F1989-02-06
|
57°F2017-02-10
27°F1989-02-06
|
| March | 96°F2026-03-19
46°F2006-03-11
|
61°F2026-03-21
34°F2023-03-02
|
| April | 97°F1989-04-06
50°F1998-04-01
|
63°F2020-04-30
33°F1999-04-02
|
| May | 105°F1984-05-29
55°F1998-05-13
|
71°F1984-05-30
43°F1999-05-01
|
| June | 109°F1990-06-26
58°F1999-06-03
|
77°F1990-06-27
45°F1999-06-04
|
| July | 112°F2018-07-06
75°F1987-07-21
|
82°F2018-07-07
53°F2004-07-01
|
| August | 108°F1981-08-27
72°F1983-08-19
|
79°F1983-08-06
55°F1990-08-26
|
| September | 115°F2020-09-06
62°F1986-09-24
|
82°F2022-09-04
48°F1982-09-30
|
| October | 104°F1980-10-01
57°F2004-10-27
|
73°F2015-10-13
40°F2019-10-31
|
| November | 92°F2010-11-03
46°F2019-11-28
|
63°F2020-11-06
30°F1994-11-20
|
| December | 84°F2021-12-01
45°F1990-12-22
|
58°F2014-12-04
25°F1990-12-23
|
Records by season
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have reached in each meteorological season (Northern Hemisphere, each a three-month span).
| Season | Daytime high | Overnight low |
|---|---|---|
| Winter (Dec–Feb) | 89°F2026-02-27
43°F1989-02-06
|
58°F2018-01-08
25°F1990-12-23
|
| Spring (Mar–May) | 105°F1984-05-29
46°F2006-03-11
|
71°F1984-05-30
33°F1999-04-02
|
| Summer (Jun–Aug) | 112°F2018-07-06
58°F1999-06-03
|
82°F2018-07-07
45°F1999-06-04
|
| Autumn (Sep–Nov) | 115°F2020-09-06
46°F2019-11-28
|
82°F2022-09-04
30°F1994-11-20
|
All-time records
The most extreme value Fontana has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Gust
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.