Weather on October 20
Fontana, CA
55 Years of Data
Avg High
82°F
Avg Low
54°F
Warmest
2003
81°F avg
Coldest
2004
58°F avg
About This Date
October 20th in Fontana, CA typically brings warm fall weather, with average highs around 82°F and lows near 54°F — a 28°F daily swing. Over 55 years of records, the warmest October 20th was in 2003 (81°F average), while the coldest was 2004 (58°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 13% of October 20th dates historically, with the wettest October 20th recording 3.4" of rain. The last decade has been 5.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.2°F warmer on this date compared to 20-30 years ago.
Planning for October 20th in Fontana, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 56° | 71° | — | — |
| 2024 | 85° | 55° | 70° | — | — |
| 2023 | 96° | 65° | 80° | — | — |
| 2022 | 90° | 66° | 78° | — | — |
| 2021 | 81° | 52° | 66° | — | — |
| 2020 | 86° | 62° | 74° | — | — |
| 2019 | 86° | 51° | 69° | — | — |
| 2018 | 90° | 59° | 74° | — | — |
| 2017 | 73° | 57° | 65° | — | — |
| 2016 | 96° | 55° | 76° | — | — |
| 2015 | 81° | 58° | 69° | — | — |
| 2014 | 81° | 59° | 70° | — | — |
| 2013 | 83° | 52° | 67° | — | — |
| 2012 | 74° | 63° | 68° | 0.03" | — |
| 2011 | 75° | 57° | 66° | — | — |
| 2010 | 67° | 59° | 63° | 0.18" | — |
| 2009 | 75° | 55° | 65° | — | — |
| 2008 | 78° | 52° | 65° | — | — |
| 2007 | 80° | 55° | 68° | — | — |
| 2006 | 88° | 54° | 71° | — | — |
| 2005 | 78° | 55° | 67° | — | — |
| 2004coldest | 63° | 54° | 58° | 2.46" | — |
| 2003warmest | 101° | 62° | 81° | — | — |
| 2002 | 74° | 49° | 61° | — | — |
| 2001 | 78° | 53° | 66° | — | — |
| 2000 | 80° | 54° | 67° | — | — |
| 1999 | 95° | 55° | 75° | — | — |
| 1998 | 90° | 45° | 67° | — | — |
| 1997 | 76° | 58° | 67° | — | — |
| 1996 | 76° | 48° | 62° | — | — |
| 1995 | 89° | 55° | 72° | — | — |
| 1994 | 81° | 47° | 64° | — | — |
| 1993 | 91° | 49° | 70° | — | — |
| 1992 | 81° | 41° | 61° | — | — |
| 1991 | 96° | 56° | 76° | — | — |
| 1990 | 82° | 51° | 67° | — | — |
| 1989 | 87° | 61° | 74° | — | — |
| 1988 | 79° | 62° | 70° | — | — |
| 1987 | 78° | 53° | 66° | — | — |
| 1986 | 81° | 42° | 61° | — | — |
| 1985 | 81° | 50° | 65° | — | — |
| 1984 | 74° | 52° | 63° | — | — |
| 1983 | 78° | 50° | 64° | — | — |
| 1982 | 78° | 50° | 64° | — | — |
| 1981 | 88° | 54° | 71° | — | — |
| 1980 | 88° | 54° | 71° | — | — |
| 1979 | 65° | 54° | 59° | 3.4" | — |
| 1978 | 83° | 60° | 71° | 0.05" | — |
| 1977 | 71° | 50° | 61° | — | — |
| 1976 | 80° | 59° | 70° | — | — |
| 1975 | 75° | 55° | 65° | 0.03" | — |
| 1974 | 79° | 57° | 68° | — | — |
| 1973 | 86° | 51° | 69° | — | — |
| 1972 | 66° | 56° | 61° | 0.03" | — |
| 1971 | 85° | 49° | 67° | — | — |
55 years of data from FONTANA KAISER