Fontana, California, United States weather records
Record high and low temperatures for Fontana, California, United States, by month, by season, and all-time, with the dates they occurred, across 1981–2026 of daily climate history. Its hottest day on record reached 114°F on 2020-09-06; its coldest fell to 21°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 | 86°F2003-01-31
42°F1987-01-16
|
56°F2018-01-08
24°F2007-01-14
|
| February | 88°F2026-02-27
42°F1989-02-06
|
60°F2026-02-28
23°F1990-02-15
|
| March | 96°F2026-03-20
41°F2006-03-11
|
67°F2026-03-18
27°F1991-03-16
|
| April | 97°F1989-04-07
47°F1998-04-01
|
68°F1989-04-07
29°F1999-04-02
|
| May | 103°F2003-05-28
55°F1998-05-12
|
71°F2013-05-13
36°F1991-05-02
|
| June | 113°F2016-06-20
58°F1995-06-16
|
77°F2016-06-20
42°F1988-06-08
|
| July | 112°F2018-07-06
77°F1987-07-17
|
82°F2006-07-23
50°F1982-07-05
|
| August | 110°F1997-08-05
76°F2000-08-29
|
82°F2017-08-29
50°F1990-08-26
|
| September | 114°F2020-09-06
61°F1983-09-30
|
84°F2020-09-06
43°F1982-09-30
|
| October | 107°F2024-10-02
56°F1996-10-30
|
74°F2024-10-03
39°F1991-10-31
|
| November | 92°F2020-11-04
46°F2004-11-21
|
64°F2017-11-23
27°F1994-11-19
|
| December | 84°F2025-12-10
40°F2008-12-17
|
57°F2025-12-14
21°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) | 88°F2026-02-27
40°F2008-12-17
|
60°F2026-02-28
21°F1990-12-23
|
| Spring (Mar–May) | 103°F2003-05-28
41°F2006-03-11
|
71°F2013-05-13
27°F1991-03-16
|
| Summer (Jun–Aug) | 113°F2016-06-20
58°F1995-06-16
|
82°F2006-07-23
42°F1988-06-08
|
| Autumn (Sep–Nov) | 114°F2020-09-06
46°F2004-11-21
|
84°F2020-09-06
27°F1994-11-19
|
All-time records
The most extreme value Fontana has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.