Basilemorin / CC0
Fairfield, CA Weather on May 15
May 15th in Fairfield, CA typically brings pleasant spring weather, with average highs around 78°F and lows near 51°F — a 27°F daily swing. Over 55 years of records, the warmest May 15th was in 2014 (77°F average), while the coldest was 2011 (52°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 9% of May 15th dates historically, with the wettest May 15th recording 5.51" of rain. Temperatures on this date have remained relatively stable over the past several decades.
What to Expect on May 15
Planning for May 15th in Fairfield, CA? Great weather for outdoor activities.
May 15 Weather Records for Fairfield
- •The all-time record high for May 15th in Fairfield, CA is 95°F, set in 2014.
- •The coldest May 15th on record dropped to 44°F in 2017.
- •Temperatures have reached 90°F or higher on May 15th in 3 of the last 55 years.
Frequently Asked Questions
What was the warmest May 15 ever in Fairfield?
The warmest May 15 in Fairfield, CA reached 95°F in 2014. That is 17°F above the long-term average high of 78°F.
What was the coldest May 15 ever in Fairfield?
The coldest May 15 in Fairfield, CA dropped to 44°F in 2017. That is 7°F below the long-term average low of 51°F.
What is the average temperature on May 15 in Fairfield?
On May 15, Fairfield averages a high of 78°F and a low of 51°F based on 55 years of NOAA weather observations from FAIRFIELD.
How many years of weather data are available for May 15 in Fairfield?
We have 55 years of weather records for May 15 in Fairfield, 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 15 Weather History in Fairfield
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 84°F | 52°F | 0" | -- |
| 2024 | 83°F | 55°F | 0" | -- |
| 2023 | 82°F | 53°F | 0" | -- |
| 2022 | 82°F | 56°F | 0" | -- |
| 2021 | 69°F | 51°F | 0" | -- |
| 2020 | 79°F | 51°F | 0" | -- |
| 2019 | 64°F | 55°F | 0.94" | -- |
| 2018 | 69°F | 53°F | 0" | -- |
| 2017 | 72°F | 44°F | 0" | -- |
| 2016 | 79°F | 53°F | 0" | -- |
| 2015 | 70°F | 48°F | 0" | -- |
| 2014 | 95°F | 59°F | 0" | -- |
| 2013 | 77°F | 51°F | 0" | -- |
| 2012 | 77°F | 51°F | 0" | -- |
| 2011 | 60°F | 44°F | 0" | -- |
| 2010 | 76°F | 49°F | 0" | -- |
| 2009 | 80°F | 56°F | 0" | -- |
| 2008 | 94°F | 49°F | 0" | -- |
| 2007 | 84°F | 50°F | 0" | -- |
| 2006 | 84°F | 64°F | 0" | -- |
| 2005 | 80°F | 59°F | 0" | -- |
| 2004 | 80°F | 52°F | 0" | -- |
| 2003 | 74°F | 49°F | 0" | -- |
| 2002 | 83°F | 50°F | 0" | -- |
| 2001 | 80°F | 53°F | 0" | -- |
| 2000 | 63°F | 52°F | 0.81" | -- |
| 1999 | 70°F | 44°F | 0" | -- |
| 1998 | 65°F | 46°F | 0" | -- |
| 1997 | 87°F | 58°F | -- | -- |
| 1996 | 73°F | 60°F | 5.51" | -- |
| 1995 | 70°F | 48°F | 0" | -- |
| 1994 | 67°F | 55°F | 0" | -- |
| 1993 | 81°F | 49°F | -- | -- |
| 1992 | 75°F | 50°F | 0" | -- |
| 1991 | 82°F | 45°F | 0" | -- |
| 1990 | 78°F | 50°F | 0" | -- |
| 1989 | 78°F | 51°F | 0.03" | -- |
| 1988 | 77°F | 52°F | 0" | -- |
| 1987 | 83°F | 62°F | 0" | -- |
| 1986 | 87°F | 46°F | 0" | -- |
| 1985 | 87°F | 47°F | 0" | -- |
| 1984 | 78°F | 50°F | 0" | -- |
| 1983 | 81°F | 53°F | 0" | -- |
| 1982 | 81°F | 49°F | 0" | -- |
| 1981 | 76°F | 50°F | 0" | -- |
| 1980 | 78°F | 46°F | 0" | -- |
| 1979 | 88°F | 46°F | 0" | -- |
| 1978 | 71°F | 52°F | 0.13" | -- |
| 1977 | 68°F | 45°F | 0" | -- |
| 1976 | 82°F | 55°F | 0" | -- |
| 1975 | 63°F | 47°F | 0" | -- |
| 1974 | 74°F | 49°F | 0" | -- |
| 1973 | 75°F | 55°F | 0" | -- |
| 1972 | 93°F | 52°F | 0" | -- |
| 1971 | 78°F | 51°F | 0" | -- |
Based on 55 years of data from NOAA station: FAIRFIELD
Monthly Climate Averages
Historical temperature and precipitation averages for Fairfield, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.