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Antioch, CA Weather on May 15
May 15th in Antioch, CA typically brings pleasant spring weather, with average highs around 78°F and lows near 54°F. Over 55 years of records, the warmest May 15th was in 2008 (84°F average), while the coldest was 1995 (55°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 5% of May 15th dates historically. Temperatures on this date have remained relatively stable over the past several decades.
What to Expect on May 15
Planning for May 15th in Antioch, CA? Great weather for outdoor activities.
May 15 Weather Records for Antioch
- •The all-time record high for May 15th in Antioch, CA is 98°F, set in 2008.
- •The coldest May 15th on record dropped to 46°F in 2011.
- •Temperatures have reached 90°F or higher on May 15th in 7 of the last 55 years.
Frequently Asked Questions
What was the warmest May 15 ever in Antioch?
The warmest May 15 in Antioch, CA reached 98°F in 2008. That is 20°F above the long-term average high of 78°F.
What was the coldest May 15 ever in Antioch?
The coldest May 15 in Antioch, CA dropped to 46°F in 2011. That is 8°F below the long-term average low of 54°F.
What is the average temperature on May 15 in Antioch?
On May 15, Antioch averages a high of 78°F and a low of 54°F based on 55 years of NOAA weather observations from ANTIOCH FIBREBRD MILLS.
How many years of weather data are available for May 15 in Antioch?
We have 55 years of weather records for May 15 in Antioch, 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 Antioch
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 76°F | 55°F | -- | -- |
| 2024 | 75°F | 61°F | -- | -- |
| 2023 | 72°F | 50°F | -- | -- |
| 2022 | 73°F | 54°F | -- | -- |
| 2021 | 73°F | 52°F | 0" | -- |
| 2020 | 78°F | 56°F | 0" | -- |
| 2019 | 69°F | 57°F | 0.48" | -- |
| 2018 | 71°F | 52°F | 0" | -- |
| 2017 | 74°F | 49°F | 0" | -- |
| 2016 | 80°F | 56°F | 0" | -- |
| 2015 | 71°F | 48°F | 0.03" | -- |
| 2014 | 95°F | 63°F | 0" | -- |
| 2013 | 77°F | 55°F | 0" | -- |
| 2012 | 70°F | 51°F | -- | -- |
| 2011 | 68°F | 46°F | -- | -- |
| 2010 | 81°F | 50°F | -- | -- |
| 2009 | 90°F | 61°F | 0" | -- |
| 2008 | 98°F | 69°F | 0" | -- |
| 2007 | 81°F | 49°F | -- | -- |
| 2006 | 94°F | 62°F | 0" | -- |
| 2005 | 74°F | 58°F | 0" | -- |
| 2004 | 81°F | 58°F | -- | -- |
| 2003 | 62°F | 48°F | -- | -- |
| 2002 | 83°F | 59°F | 0" | -- |
| 2001 | 70°F | 54°F | -- | -- |
| 2000 | 68°F | 53°F | 0" | -- |
| 1999 | 72°F | 48°F | 0" | -- |
| 1998 | 63°F | 47°F | 0" | -- |
| 1997 | 86°F | 65°F | 0" | -- |
| 1996 | 80°F | 61°F | 0" | -- |
| 1995 | 62°F | 49°F | 0.03" | -- |
| 1994 | 82°F | 55°F | 0" | -- |
| 1993 | 74°F | 55°F | 0" | -- |
| 1992 | 80°F | 53°F | 0" | -- |
| 1991 | 76°F | 48°F | 0" | -- |
| 1990 | 76°F | 52°F | 0" | -- |
| 1989 | 80°F | 54°F | 0" | -- |
| 1988 | 84°F | 51°F | 0" | -- |
| 1987 | 95°F | 65°F | 0" | -- |
| 1986 | 82°F | 58°F | 0" | -- |
| 1985 | -- | 60°F | 0" | -- |
| 1984 | 70°F | 48°F | 0" | -- |
| 1983 | 83°F | 58°F | 0" | -- |
| 1982 | 80°F | 46°F | -- | -- |
| 1981 | 73°F | 47°F | 0" | -- |
| 1980 | 75°F | 49°F | 0" | -- |
| 1979 | 90°F | 53°F | 0" | -- |
| 1978 | 79°F | 51°F | 0" | -- |
| 1977 | 71°F | 49°F | 0" | -- |
| 1976 | 88°F | 61°F | 0" | -- |
| 1975 | 68°F | 49°F | 0" | -- |
| 1974 | 88°F | 53°F | 0" | -- |
| 1973 | 84°F | 52°F | 0" | -- |
| 1972 | 90°F | 57°F | 0" | -- |
| 1971 | 79°F | 53°F | 0" | -- |
Based on 55 years of data from NOAA station: ANTIOCH FIBREBRD MILLS
Monthly Climate Averages
Historical temperature and precipitation averages for Antioch, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.