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Fullerton, CA Weather on May 27
May 27th in Fullerton, CA typically brings pleasant spring weather, with average highs around 76°F and lows near 57°F. Over 54 years of records, the warmest May 27th was in 2014 (75°F average), while the coldest was 1980 (56°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 6% of May 27th dates historically. Temperatures on this date have remained relatively stable over the past several decades.
What to Expect on May 27
Planning for May 27th in Fullerton, CA? Great weather for outdoor activities.
May 27 Weather Records for Fullerton
- •The all-time record high for May 27th in Fullerton, CA is 93°F, set in 1973.
- •The coldest May 27th on record dropped to 45°F in 1980.
- •Temperatures have reached 90°F or higher on May 27th in 3 of the last 54 years.
- •Last year (1971), May 27th was 10°F cooler than the long-term average.
Frequently Asked Questions
What was the warmest May 27 ever in Fullerton?
The warmest May 27 in Fullerton, CA reached 93°F in 1973. That is 17°F above the long-term average high of 76°F.
What was the coldest May 27 ever in Fullerton?
The coldest May 27 in Fullerton, CA dropped to 45°F in 1980. That is 12°F below the long-term average low of 57°F.
What is the average temperature on May 27 in Fullerton?
On May 27, Fullerton averages a high of 76°F and a low of 57°F based on 54 years of NOAA weather observations from ANAHEIM.
How many years of weather data are available for May 27 in Fullerton?
We have 54 years of weather records for May 27 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 27 Weather History in Fullerton
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 77°F | 62°F | 0" | -- |
| 2024 | 73°F | 57°F | 0" | -- |
| 2023 | 72°F | 58°F | 0" | -- |
| 2022 | 79°F | 62°F | 0" | -- |
| 2021 | 78°F | 60°F | 0" | -- |
| 2020 | 84°F | 61°F | 0" | -- |
| 2019 | 69°F | 53°F | 0.2" | -- |
| 2018 | 76°F | 59°F | 0" | -- |
| 2017 | 77°F | 58°F | 0" | -- |
| 2016 | 76°F | 59°F | 0" | -- |
| 2015 | 76°F | 59°F | 0" | -- |
| 2014 | 85°F | 65°F | 0" | -- |
| 2013 | 75°F | 61°F | 0" | -- |
| 2012 | 77°F | 52°F | 0" | -- |
| 2011 | 78°F | 59°F | 0" | -- |
| 2010 | 73°F | 59°F | 0" | -- |
| 2009 | 78°F | 61°F | 0" | -- |
| 2008 | 75°F | 52°F | 0" | -- |
| 2007 | 76°F | 60°F | 0" | -- |
| 2006 | 74°F | 61°F | 0" | -- |
| 2005 | 74°F | 61°F | 0" | -- |
| 2004 | 73°F | 56°F | 0" | -- |
| 2003 | 87°F | 59°F | 0" | -- |
| 2002 | 74°F | 57°F | 0" | -- |
| 2001 | 69°F | 60°F | 0" | -- |
| 2000 | 90°F | 58°F | 0" | -- |
| 1999 | 76°F | 59°F | 0" | -- |
| 1998 | 69°F | 50°F | 0" | -- |
| 1997 | 88°F | 60°F | 0" | -- |
| 1996 | 72°F | 58°F | 0" | -- |
| 1995 | 72°F | 58°F | 0" | -- |
| 1994 | 77°F | 55°F | 0" | -- |
| 1993 | 76°F | 57°F | 0" | -- |
| 1992 | 76°F | 61°F | 0" | -- |
| 1991 | 71°F | 58°F | 0" | -- |
| 1990 | 72°F | 52°F | 0" | -- |
| 1989 | 74°F | 59°F | 0" | -- |
| 1988 | 72°F | 54°F | 0" | -- |
| 1987 | 69°F | 55°F | 0" | -- |
| 1986 | 76°F | 60°F | 0" | -- |
| 1985 | 71°F | 59°F | 0" | -- |
| 1983 | 81°F | 62°F | 0" | -- |
| 1982 | 65°F | 56°F | 0" | -- |
| 1981 | 79°F | 50°F | 0.18" | -- |
| 1980 | 68°F | 45°F | 0" | -- |
| 1979 | 71°F | 56°F | 0.08" | -- |
| 1978 | 84°F | 49°F | 0" | -- |
| 1977 | 75°F | 51°F | 0" | -- |
| 1976 | 76°F | 56°F | 0" | -- |
| 1975 | 71°F | 56°F | 0" | -- |
| 1974 | 88°F | 52°F | 0" | -- |
| 1973 | 93°F | 49°F | 0" | -- |
| 1972 | 92°F | 48°F | 0" | -- |
| 1971 | 66°F | 50°F | 0" | -- |
Based on 54 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.