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Costa Mesa, CA Weather on May 27
May 27th in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 58°F. Over 55 years of records, the warmest May 27th was in 1997 (75°F average), while the coldest was 1980 (58°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 4% 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 Costa Mesa, CA? Great weather for outdoor activities.
May 27 Weather Records for Costa Mesa
- •The all-time record high for May 27th in Costa Mesa, CA is 89°F, set in 1972.
- •The coldest May 27th on record dropped to 50°F in 1998.
- •Last year (1971), May 27th was 6°F cooler than the long-term average.
Frequently Asked Questions
What was the warmest May 27 ever in Costa Mesa?
The warmest May 27 in Costa Mesa, CA reached 89°F in 1972. That is 16°F above the long-term average high of 73°F.
What was the coldest May 27 ever in Costa Mesa?
The coldest May 27 in Costa Mesa, CA dropped to 50°F in 1998. That is 8°F below the long-term average low of 58°F.
What is the average temperature on May 27 in Costa Mesa?
On May 27, Costa Mesa averages a high of 73°F and a low of 58°F based on 55 years of NOAA weather observations from SANTA ANA JOHN WAYNE AP.
How many years of weather data are available for May 27 in Costa Mesa?
We have 55 years of weather records for May 27 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.
May 27 Weather History in Costa Mesa
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 73°F | 63°F | 0" | -- |
| 2024 | 70°F | 58°F | 0" | -- |
| 2023 | 69°F | 61°F | 0" | -- |
| 2022 | 73°F | 63°F | 0" | -- |
| 2021 | 71°F | 61°F | 0" | -- |
| 2020 | 77°F | 61°F | 0" | -- |
| 2019 | 66°F | 53°F | 0" | -- |
| 2018 | 72°F | 59°F | 0" | -- |
| 2017 | 70°F | 61°F | 0" | -- |
| 2016 | 71°F | 59°F | 0" | -- |
| 2015 | 70°F | 60°F | 0" | -- |
| 2014 | 80°F | 67°F | 0" | -- |
| 2013 | 72°F | 58°F | 0" | -- |
| 2012 | 73°F | 55°F | 0" | -- |
| 2011 | 74°F | 59°F | 0" | -- |
| 2010 | 72°F | 60°F | 0" | -- |
| 2009 | 72°F | 62°F | 0" | -- |
| 2008 | 70°F | 54°F | 0" | -- |
| 2007 | 70°F | 60°F | 0" | -- |
| 2006 | 71°F | 60°F | 0" | -- |
| 2005 | 70°F | 61°F | 0" | -- |
| 2004 | 69°F | 57°F | 0" | -- |
| 2003 | 75°F | 58°F | 0" | -- |
| 2002 | 70°F | 59°F | 0" | -- |
| 2001 | 67°F | 61°F | 0" | -- |
| 2000 | 85°F | 61°F | 0" | -- |
| 1999 | 71°F | 60°F | 0" | -- |
| 1998 | 70°F | 50°F | 0" | -- |
| 1997 | 87°F | 63°F | 0" | -- |
| 1996 | 73°F | 59°F | 0" | -- |
| 1995 | 69°F | 57°F | 0" | -- |
| 1994 | 76°F | 60°F | 0" | -- |
| 1993 | 75°F | 57°F | 0" | -- |
| 1992 | 74°F | 61°F | 0" | -- |
| 1991 | 69°F | 56°F | 0" | -- |
| 1990 | 69°F | 54°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" | -- |
| 1984 | 84°F | 60°F | 0" | -- |
| 1983 | 81°F | 62°F | 0" | -- |
| 1982 | 72°F | 59°F | 0" | -- |
| 1981 | 76°F | 60°F | 0.15" | -- |
| 1980 | 67°F | 50°F | 0" | -- |
| 1979 | 71°F | 60°F | 0" | -- |
| 1978 | 79°F | 56°F | 0" | -- |
| 1977 | 73°F | 52°F | 0" | -- |
| 1976 | 77°F | 55°F | 0" | -- |
| 1975 | 70°F | 57°F | 0" | -- |
| 1974 | 83°F | 57°F | 0" | -- |
| 1973 | 83°F | 54°F | 0" | -- |
| 1972 | 89°F | 55°F | 0" | -- |
| 1971 | 67°F | 53°F | 0.08" | -- |
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.