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Costa Mesa, CA Weather on April 12
April 12th in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 71°F and lows near 54°F. Over 55 years of records, the warmest April 12th was in 2008 (76°F average), while the coldest was 1999 (52°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 9% of April 12th dates historically, with the wettest April 12th recording 2.08" of rain. The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
What to Expect on April 12
Planning for April 12th in Costa Mesa, CA? Great weather for outdoor activities.
April 12 Weather Records for Costa Mesa
- •The all-time record high for April 12th in Costa Mesa, CA is 97°F, set in 2008.
- •The coldest April 12th on record dropped to 45°F in 1999.
- •Temperatures have reached 90°F or higher on April 12th in 2 of the last 55 years.
Frequently Asked Questions
What was the warmest April 12 ever in Costa Mesa?
The warmest April 12 in Costa Mesa, CA reached 97°F in 2008. That is 26°F above the long-term average high of 71°F.
What was the coldest April 12 ever in Costa Mesa?
The coldest April 12 in Costa Mesa, CA dropped to 45°F in 1999. That is 9°F below the long-term average low of 54°F.
What is the average temperature on April 12 in Costa Mesa?
On April 12, Costa Mesa averages a high of 71°F and a low of 54°F based on 55 years of NOAA weather observations from SANTA ANA JOHN WAYNE AP.
How many years of weather data are available for April 12 in Costa Mesa?
We have 55 years of weather records for April 12 in Costa Mesa, CA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
April 12 Weather History in Costa Mesa
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 68°F | -- | 0" | -- |
| 2024 | 62°F | 56°F | 0" | -- |
| 2023 | 62°F | 56°F | 0" | -- |
| 2022 | 73°F | 56°F | 0" | -- |
| 2021 | 67°F | 59°F | 0" | -- |
| 2020 | 64°F | 59°F | 0.03" | -- |
| 2019 | 71°F | 55°F | 0" | -- |
| 2018 | 72°F | 56°F | 0" | -- |
| 2017 | 72°F | 55°F | 0" | -- |
| 2016 | 70°F | 56°F | 0" | -- |
| 2015 | 71°F | 55°F | 0" | -- |
| 2014 | 67°F | 59°F | 0" | -- |
| 2013 | 69°F | 57°F | 0" | -- |
| 2012 | 65°F | 52°F | 0" | -- |
| 2011 | 67°F | 53°F | 0" | -- |
| 2010 | 63°F | 52°F | 2.08" | -- |
| 2009 | 69°F | 50°F | 0" | -- |
| 2008 | 97°F | 55°F | 0" | -- |
| 2007 | 70°F | 56°F | 0" | -- |
| 2006 | 69°F | 52°F | 0" | -- |
| 2005 | 71°F | 52°F | 0" | -- |
| 2004 | 70°F | 56°F | 0" | -- |
| 2003 | 69°F | 56°F | 0" | -- |
| 2002 | 64°F | 56°F | 0" | -- |
| 2001 | 64°F | 54°F | 0" | -- |
| 2000 | 72°F | 55°F | 0" | -- |
| 1999 | 60°F | 45°F | 0.18" | -- |
| 1998 | 65°F | 50°F | 0" | -- |
| 1997 | 73°F | 52°F | 0" | -- |
| 1996 | 71°F | 52°F | 0" | -- |
| 1995 | 78°F | 52°F | 0" | -- |
| 1994 | 90°F | 55°F | 0" | -- |
| 1993 | 72°F | 54°F | 0" | -- |
| 1992 | 74°F | 52°F | 0" | -- |
| 1991 | 71°F | 45°F | 0" | -- |
| 1990 | 78°F | 55°F | 0" | -- |
| 1989 | 63°F | 58°F | 0.05" | -- |
| 1988 | 83°F | 57°F | 0" | -- |
| 1987 | 71°F | 54°F | 0" | -- |
| 1986 | 65°F | 56°F | 0.25" | -- |
| 1985 | 78°F | 50°F | 0" | -- |
| 1984 | 78°F | 51°F | 0" | -- |
| 1983 | 62°F | 47°F | 0" | -- |
| 1982 | 70°F | 57°F | 0" | -- |
| 1981 | 71°F | 51°F | 0" | -- |
| 1980 | 87°F | 61°F | 0" | -- |
| 1979 | 78°F | 52°F | 0" | -- |
| 1978 | 69°F | 57°F | 0" | -- |
| 1977 | 73°F | 49°F | 0" | -- |
| 1976 | 68°F | 48°F | 0" | -- |
| 1975 | 63°F | 47°F | 0" | -- |
| 1974 | 75°F | 51°F | 0" | -- |
| 1973 | 70°F | 53°F | 0" | -- |
| 1972 | 67°F | 50°F | 0" | -- |
| 1971 | 73°F | 50°F | 0" | -- |
Based on 55 years of data from NOAA station: SANTA ANA JOHN WAYNE AP
Monthly Climate Averages
Historical temperature and precipitation averages for Costa Mesa, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.