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Fullerton, CA Weather on May 25
May 25th in Fullerton, CA typically brings pleasant spring weather, with average highs around 75°F and lows near 57°F. Over 55 years of records, the warmest May 25th was in 2021 (76°F average), while the coldest was 1980 (57°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 2% of May 25th dates historically. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
What to Expect on May 25
Planning for May 25th in Fullerton, CA? Great weather for outdoor activities.
May 25 Weather Records for Fullerton
- •The all-time record high for May 25th in Fullerton, CA is 98°F, set in 1974.
- •The coldest May 25th on record dropped to 42°F in 1980.
- •Temperatures have reached 90°F or higher on May 25th in 2 of the last 55 years.
Frequently Asked Questions
What was the warmest May 25 ever in Fullerton?
The warmest May 25 in Fullerton, CA reached 98°F in 1974. That is 23°F above the long-term average high of 75°F.
What was the coldest May 25 ever in Fullerton?
The coldest May 25 in Fullerton, CA dropped to 42°F in 1980. That is 15°F below the long-term average low of 57°F.
What is the average temperature on May 25 in Fullerton?
On May 25, Fullerton averages a high of 75°F and a low of 57°F based on 55 years of NOAA weather observations from ANAHEIM.
How many years of weather data are available for May 25 in Fullerton?
We have 55 years of weather records for May 25 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.
May 25 Weather History in Fullerton
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 75°F | 61°F | 0" | -- |
| 2024 | 71°F | 57°F | 0" | -- |
| 2023 | 70°F | 60°F | 0" | -- |
| 2022 | 78°F | 59°F | 0" | -- |
| 2021 | 91°F | 61°F | 0" | -- |
| 2020 | 84°F | 61°F | 0" | -- |
| 2019 | 74°F | 54°F | 0" | -- |
| 2018 | 72°F | 59°F | 0" | -- |
| 2017 | 74°F | 59°F | 0.03" | -- |
| 2016 | 71°F | 58°F | 0" | -- |
| 2015 | 71°F | 56°F | 0" | -- |
| 2014 | 82°F | 63°F | 0" | -- |
| 2013 | 75°F | 60°F | 0" | -- |
| 2012 | 70°F | 61°F | 0" | -- |
| 2011 | 79°F | 54°F | 0" | -- |
| 2010 | 74°F | 51°F | 0" | -- |
| 2009 | 74°F | 60°F | 0" | -- |
| 2008 | 70°F | 60°F | 0" | -- |
| 2007 | 79°F | 60°F | 0" | -- |
| 2006 | 85°F | 62°F | 0" | -- |
| 2005 | 84°F | 63°F | 0" | -- |
| 2004 | 70°F | 59°F | 0" | -- |
| 2003 | 79°F | 55°F | 0" | -- |
| 2002 | 73°F | 58°F | 0" | -- |
| 2001 | 77°F | 62°F | 0" | -- |
| 2000 | 65°F | 60°F | 0" | -- |
| 1999 | 74°F | 57°F | 0" | -- |
| 1998 | 72°F | 58°F | 0" | -- |
| 1997 | 75°F | 59°F | 0" | -- |
| 1996 | 68°F | 54°F | 0" | -- |
| 1995 | 68°F | 56°F | 0" | -- |
| 1994 | 64°F | 58°F | 0" | -- |
| 1993 | 77°F | 58°F | 0" | -- |
| 1992 | 75°F | 61°F | 0" | -- |
| 1991 | 76°F | 56°F | 0" | -- |
| 1990 | 76°F | 54°F | 0" | -- |
| 1989 | 73°F | 55°F | 0" | -- |
| 1988 | 75°F | 60°F | 0" | -- |
| 1987 | 69°F | 57°F | 0" | -- |
| 1986 | 82°F | 58°F | 0" | -- |
| 1985 | 74°F | 59°F | 0" | -- |
| 1984 | 76°F | 61°F | 0" | -- |
| 1983 | 77°F | 60°F | 0" | -- |
| 1982 | 79°F | 58°F | 0" | -- |
| 1981 | 79°F | 59°F | 0" | -- |
| 1980 | 71°F | 42°F | 0" | -- |
| 1979 | 78°F | 56°F | 0" | -- |
| 1978 | 72°F | 45°F | 0" | -- |
| 1977 | 71°F | 50°F | 0" | -- |
| 1976 | 73°F | 52°F | 0" | -- |
| 1975 | 76°F | 54°F | 0" | -- |
| 1974 | 98°F | 52°F | 0" | -- |
| 1973 | 65°F | 54°F | 0" | -- |
| 1972 | 69°F | 56°F | 0" | -- |
| 1971 | 77°F | 53°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.