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Fontana, CA Weather on October 9
October 9th in Fontana, CA typically brings warm fall weather, with average highs around 84°F and lows near 57°F — a 27°F daily swing. Over 55 years of records, the warmest October 9th was in 1971 (85°F average), while the coldest was 2013 (56°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 2% of October 9th dates historically. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
What to Expect on October 9
Planning for October 9th in Fontana, CA? Stay hydrated and seek shade during peak afternoon hours.
October 9 Weather Records for Fontana
- •The all-time record high for October 9th in Fontana, CA is 104°F, set in 1971.
- •The coldest October 9th on record dropped to 36°F in 1990.
- •Temperatures have reached 90°F or higher on October 9th in 16 of the last 55 years.
- •Last year (1971), October 9th was 20°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest October 9 ever in Fontana?
The warmest October 9 in Fontana, CA reached 104°F in 1971. That is 20°F above the long-term average high of 84°F.
What was the coldest October 9 ever in Fontana?
The coldest October 9 in Fontana, CA dropped to 36°F in 1990. That is 21°F below the long-term average low of 57°F.
What is the average temperature on October 9 in Fontana?
On October 9, Fontana averages a high of 84°F and a low of 57°F based on 55 years of NOAA weather observations from FONTANA KAISER.
How many years of weather data are available for October 9 in Fontana?
We have 55 years of weather records for October 9 in Fontana, CA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
October 9 Weather History in Fontana
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 81°F | 58°F | 0" | -- |
| 2024 | 92°F | 63°F | 0" | -- |
| 2023 | 88°F | 63°F | 0" | -- |
| 2022 | 86°F | 62°F | 0" | -- |
| 2021 | 76°F | 58°F | 0" | -- |
| 2020 | 78°F | 63°F | 0" | -- |
| 2019 | 80°F | 54°F | 0" | -- |
| 2018 | 79°F | 57°F | 0" | -- |
| 2017 | 85°F | 58°F | 0" | -- |
| 2016 | 95°F | 58°F | 0" | -- |
| 2015 | 103°F | 67°F | 0" | -- |
| 2014 | 82°F | 64°F | 0" | -- |
| 2013 | 63°F | 49°F | 0.09" | -- |
| 2012 | 78°F | 58°F | 0" | -- |
| 2011 | 83°F | 53°F | 0" | -- |
| 2010 | 91°F | 55°F | 0" | -- |
| 2009 | 77°F | 53°F | 0" | -- |
| 2008 | 90°F | 62°F | 0" | -- |
| 2007 | 84°F | 52°F | 0" | -- |
| 2006 | 70°F | 59°F | 0" | -- |
| 2005 | 77°F | 52°F | 0" | -- |
| 2004 | 84°F | 56°F | 0" | -- |
| 2003 | 81°F | 60°F | 0" | -- |
| 2002 | 88°F | 59°F | 0" | -- |
| 2001 | 72°F | 58°F | 0" | -- |
| 2000 | 74°F | 56°F | 0" | -- |
| 1999 | 98°F | 58°F | 0" | -- |
| 1998 | 83°F | 52°F | 0" | -- |
| 1997 | 83°F | 53°F | 0" | -- |
| 1996 | 97°F | 60°F | 0" | -- |
| 1995 | 84°F | 58°F | 0" | -- |
| 1994 | 96°F | 53°F | 0" | -- |
| 1993 | 77°F | 59°F | 0" | -- |
| 1992 | 92°F | 54°F | 0" | -- |
| 1991 | 103°F | 62°F | 0" | -- |
| 1990 | 94°F | 36°F | 0" | -- |
| 1989 | 100°F | 54°F | 0" | -- |
| 1988 | 101°F | 56°F | 0" | -- |
| 1987 | 81°F | 61°F | 0" | -- |
| 1986 | 77°F | 54°F | 0" | -- |
| 1985 | 74°F | 54°F | 0" | -- |
| 1984 | 85°F | 58°F | 0" | -- |
| 1983 | 74°F | 56°F | 0" | -- |
| 1982 | 81°F | 70°F | 0" | -- |
| 1981 | 76°F | 56°F | 0" | -- |
| 1980 | 89°F | 57°F | 0" | -- |
| 1979 | 84°F | 50°F | 0" | -- |
| 1978 | 93°F | 58°F | 0" | -- |
| 1977 | 86°F | 57°F | 0" | -- |
| 1976 | 98°F | 64°F | 0" | -- |
| 1975 | 76°F | 53°F | 0" | -- |
| 1974 | 74°F | 55°F | 0" | -- |
| 1973 | 73°F | 47°F | 0" | -- |
| 1972 | 72°F | 63°F | 0" | -- |
| 1971 | 104°F | 66°F | 0" | -- |
Based on 55 years of data from NOAA station: FONTANA KAISER
Monthly Climate Averages
Historical temperature and precipitation averages for Fontana, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.