Unknown author / CC0
Fullerton, CA Weather on July 17
July 17th in Fullerton, CA typically brings warm summer weather, with average highs around 86°F and lows near 64°F. Over 55 years of records, the warmest July 17th was in 2006 (84°F average), while the coldest was 1987 (65°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 2% of July 17th dates historically. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
What to Expect on July 17
Planning for July 17th in Fullerton, CA? Stay hydrated and seek shade during peak afternoon hours.
July 17 Weather Records for Fullerton
- •The all-time record high for July 17th in Fullerton, CA is 97°F, set in 1979.
- •The coldest July 17th on record dropped to 56°F in 1975.
- •Temperatures have reached 90°F or higher on July 17th in 16 of the last 55 years.
- •Last year (1971), July 17th was 5°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest July 17 ever in Fullerton?
The warmest July 17 in Fullerton, CA reached 97°F in 1979. That is 11°F above the long-term average high of 86°F.
What was the coldest July 17 ever in Fullerton?
The coldest July 17 in Fullerton, CA dropped to 56°F in 1975. That is 8°F below the long-term average low of 64°F.
What is the average temperature on July 17 in Fullerton?
On July 17, Fullerton averages a high of 86°F and a low of 64°F based on 55 years of NOAA weather observations from ANAHEIM.
How many years of weather data are available for July 17 in Fullerton?
We have 55 years of weather records for July 17 in Fullerton, CA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
July 17 Weather History in Fullerton
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 82°F | 63°F | 0" | -- |
| 2024 | 86°F | 66°F | 0" | -- |
| 2023 | 96°F | 69°F | 0" | -- |
| 2022 | 91°F | 66°F | 0" | -- |
| 2021 | 91°F | 68°F | 0" | -- |
| 2020 | 84°F | 65°F | 0" | -- |
| 2019 | 83°F | 66°F | 0" | -- |
| 2018 | 88°F | 69°F | 0" | -- |
| 2017 | 86°F | 69°F | 0" | -- |
| 2016 | 85°F | 65°F | 0" | -- |
| 2015 | 89°F | 65°F | 0" | -- |
| 2014 | 83°F | 66°F | 0" | -- |
| 2013 | 90°F | 61°F | 0" | -- |
| 2012 | 79°F | 62°F | 0" | -- |
| 2011 | 84°F | 59°F | 0" | -- |
| 2010 | 95°F | 69°F | 0" | -- |
| 2009 | 93°F | 68°F | 0" | -- |
| 2008 | 83°F | 67°F | 0" | -- |
| 2007 | 84°F | 67°F | 0" | -- |
| 2006 | 96°F | 72°F | 0" | -- |
| 2005 | 84°F | 60°F | 0" | -- |
| 2004 | 95°F | 68°F | 0" | -- |
| 2003 | 90°F | 69°F | 0" | -- |
| 2002 | 83°F | 64°F | 0" | -- |
| 2001 | 78°F | 59°F | 0" | -- |
| 2000 | 84°F | 58°F | 0" | -- |
| 1999 | 84°F | 62°F | 0" | -- |
| 1998 | 95°F | 63°F | 0" | -- |
| 1997 | 87°F | 64°F | 0" | -- |
| 1996 | 79°F | 65°F | 0" | -- |
| 1995 | 89°F | 66°F | 0" | -- |
| 1994 | 81°F | 64°F | 0" | -- |
| 1993 | 82°F | 63°F | 0" | -- |
| 1992 | 91°F | 66°F | 0" | -- |
| 1991 | 78°F | 63°F | 0" | -- |
| 1990 | 88°F | 67°F | 0" | -- |
| 1989 | 80°F | 63°F | 0" | -- |
| 1988 | 82°F | 65°F | 0" | -- |
| 1987 | 71°F | 59°F | 0.05" | -- |
| 1986 | 78°F | 62°F | 0" | -- |
| 1985 | 83°F | 67°F | 0" | -- |
| 1984 | 87°F | 69°F | 0" | -- |
| 1983 | 79°F | 61°F | 0" | -- |
| 1982 | 85°F | 59°F | 0" | -- |
| 1981 | 90°F | 64°F | 0" | -- |
| 1980 | 89°F | 58°F | 0" | -- |
| 1979 | 97°F | 59°F | 0" | -- |
| 1978 | 88°F | 60°F | 0" | -- |
| 1977 | 92°F | 60°F | 0" | -- |
| 1976 | 81°F | 60°F | 0" | -- |
| 1975 | 83°F | 56°F | 0" | -- |
| 1974 | 95°F | 56°F | 0" | -- |
| 1973 | 78°F | 59°F | 0" | -- |
| 1972 | 84°F | 58°F | 0" | -- |
| 1971 | 91°F | 60°F | 0" | -- |
Based on 55 years of data from NOAA station: ANAHEIM
Monthly Climate Averages
Historical temperature and precipitation averages for Fullerton, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.