Weather on April 18
Fontana, CA
55 Years of Data
Avg High
75°F
Avg Low
50°F
Warmest
2019
75°F avg
Coldest
1971
53°F avg
About This Date
April 18th in Fontana, CA typically brings pleasant spring weather, with average highs around 75°F and lows near 50°F — a 25°F daily swing. Over 55 years of records, the warmest April 18th was in 2019 (75°F average), while the coldest was 1971 (53°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 15% of April 18th dates historically, with the wettest April 18th recording 1.68" of rain. The last decade has been 5.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.0°F warmer on this date compared to 20-30 years ago.
Planning for April 18th in Fontana, CA? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 50° | 55° | 0.03" | — |
| 2024 | 78° | 53° | 66° | — | — |
| 2023 | 64° | 49° | 56° | — | — |
| 2022 | 82° | 53° | 68° | — | — |
| 2021 | 88° | 54° | 71° | — | — |
| 2020 | 63° | 52° | 57° | 0.08" | — |
| 2019warmest | 93° | 57° | 75° | — | — |
| 2018 | 77° | 50° | 64° | — | — |
| 2017 | 76° | 61° | 68° | — | — |
| 2016 | 91° | 57° | 74° | — | — |
| 2015 | 84° | 54° | 69° | — | — |
| 2014 | 75° | 58° | 66° | — | — |
| 2013 | 79° | 48° | 63° | — | — |
| 2012 | 81° | 53° | 67° | — | — |
| 2011 | 63° | 56° | 59° | — | — |
| 2010 | 80° | 51° | 66° | — | — |
| 2009 | 88° | 50° | 69° | — | — |
| 2008 | 87° | 55° | 71° | — | — |
| 2007 | 70° | 49° | 59° | — | — |
| 2006 | 79° | 45° | 62° | — | — |
| 2005 | 63° | 53° | 58° | — | — |
| 2004 | 67° | 46° | 56° | — | — |
| 2003 | 62° | 48° | 55° | — | — |
| 2002 | 66° | 43° | 54° | — | — |
| 2001 | 74° | 52° | 63° | — | — |
| 2000 | 61° | 47° | 54° | 1.68" | — |
| 1999 | 92° | 54° | 73° | — | — |
| 1998 | 82° | 42° | 62° | — | — |
| 1997 | 81° | 50° | 65° | — | — |
| 1996 | 74° | 54° | 64° | 0.36" | — |
| 1995 | 60° | 46° | 53° | 1.02" | — |
| 1994 | 89° | 53° | 71° | — | — |
| 1993 | 74° | 55° | 64° | — | — |
| 1992 | 88° | 54° | 71° | — | — |
| 1991 | 72° | 46° | 59° | — | — |
| 1990 | 71° | 54° | 62° | — | — |
| 1989 | 84° | 53° | 69° | — | — |
| 1988 | 70° | 55° | 62° | — | — |
| 1987 | 76° | 55° | 65° | — | — |
| 1986 | 80° | 42° | 61° | — | — |
| 1985 | 63° | 49° | 56° | — | — |
| 1984 | 70° | 50° | 60° | — | — |
| 1983 | 64° | 50° | 57° | 1.14" | — |
| 1982 | 79° | 43° | 61° | — | — |
| 1981 | 65° | 52° | 58° | — | — |
| 1980 | 91° | 49° | 70° | — | — |
| 1979 | 67° | 42° | 54° | — | — |
| 1978 | 78° | 43° | 60° | — | — |
| 1977 | 76° | 51° | 63° | — | — |
| 1976 | 72° | 44° | 58° | — | — |
| 1975 | 65° | 44° | 54° | — | — |
| 1974 | 80° | 49° | 64° | — | — |
| 1973 | 70° | 48° | 59° | — | — |
| 1972 | 67° | 52° | 59° | 0.1" | — |
| 1971coldest | 62° | 44° | 53° | 0.56" | — |
55 years of data from FONTANA KAISER