Basilemorin / CC0
Mission Viejo, CA Weather on May 27
May 27th in Mission Viejo, CA typically brings pleasant spring weather, with average highs around 74°F and lows near 55°F. Over 55 years of records, the warmest May 27th was in 2000 (73°F average), while the coldest was 2019 (57°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 7% of May 27th dates historically. The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
What to Expect on May 27
Planning for May 27th in Mission Viejo, CA? Great weather for outdoor activities.
May 27 Weather Records for Mission Viejo
- •The all-time record high for May 27th in Mission Viejo, CA is 90°F, set in 1972.
- •The coldest May 27th on record dropped to 47°F in 2012.
- •Temperatures have reached 90°F or higher on May 27th in 1 of the last 55 years.
- •Last year (1971), May 27th was 7°F cooler than the long-term average.
Frequently Asked Questions
What was the warmest May 27 ever in Mission Viejo?
The warmest May 27 in Mission Viejo, CA reached 90°F in 1972. That is 16°F above the long-term average high of 74°F.
What was the coldest May 27 ever in Mission Viejo?
The coldest May 27 in Mission Viejo, CA dropped to 47°F in 2012. That is 8°F below the long-term average low of 55°F.
What is the average temperature on May 27 in Mission Viejo?
On May 27, Mission Viejo averages a high of 74°F and a low of 55°F based on 55 years of NOAA weather observations from EL TORO MCAS.
How many years of weather data are available for May 27 in Mission Viejo?
We have 55 years of weather records for May 27 in Mission Viejo, 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 Mission Viejo
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 75°F | 57°F | -- | -- |
| 2024 | 73°F | 52°F | -- | -- |
| 2023 | 68°F | 55°F | -- | -- |
| 2022 | 72°F | 57°F | -- | -- |
| 2021 | 74°F | 53°F | -- | -- |
| 2020 | 84°F | 55°F | -- | -- |
| 2019 | 66°F | 49°F | -- | -- |
| 2018 | 72°F | 53°F | -- | -- |
| 2017 | 71°F | 54°F | -- | -- |
| 2016 | 73°F | 57°F | -- | -- |
| 2015 | 72°F | 57°F | -- | -- |
| 2014 | 79°F | 60°F | -- | -- |
| 2013 | 74°F | 52°F | -- | -- |
| 2012 | 76°F | 47°F | -- | -- |
| 2011 | 76°F | 51°F | -- | -- |
| 2010 | 72°F | 51°F | -- | -- |
| 2009 | 75°F | 57°F | -- | -- |
| 2008 | 72°F | 47°F | -- | -- |
| 2007 | 73°F | 53°F | -- | -- |
| 2006 | 71°F | 51°F | -- | -- |
| 2005 | 78°F | 57°F | 0" | -- |
| 2004 | 73°F | 51°F | -- | -- |
| 2003 | 82°F | 52°F | -- | -- |
| 2002 | 72°F | 51°F | -- | -- |
| 2001 | 63°F | 58°F | -- | -- |
| 2000 | 89°F | 57°F | -- | -- |
| 1999 | 78°F | 57°F | -- | -- |
| 1998 | 69°F | 50°F | 0" | -- |
| 1997 | 83°F | 60°F | 0" | -- |
| 1996 | 68°F | 56°F | 0" | -- |
| 1995 | 71°F | 57°F | 0" | -- |
| 1994 | 75°F | 58°F | 0" | -- |
| 1993 | 75°F | 54°F | 0" | -- |
| 1992 | 75°F | 63°F | 0" | -- |
| 1991 | 70°F | 59°F | 0" | -- |
| 1990 | 68°F | 53°F | 0.05" | -- |
| 1989 | 75°F | 59°F | 0" | -- |
| 1988 | 69°F | 55°F | 0" | -- |
| 1987 | 65°F | 52°F | 0" | -- |
| 1986 | 77°F | 60°F | 0" | -- |
| 1985 | 71°F | 54°F | 0" | -- |
| 1984 | 85°F | 59°F | 0" | -- |
| 1983 | 82°F | 61°F | 0" | -- |
| 1982 | 63°F | 59°F | 0.08" | -- |
| 1981 | 78°F | 62°F | 0" | -- |
| 1980 | 66°F | 50°F | 0" | -- |
| 1979 | 64°F | 59°F | 0.1" | -- |
| 1978 | 77°F | 53°F | 0" | -- |
| 1977 | 72°F | 53°F | 0" | -- |
| 1976 | 75°F | 60°F | 0" | -- |
| 1975 | 67°F | 56°F | 0" | -- |
| 1974 | 75°F | 51°F | 0" | -- |
| 1973 | 88°F | 50°F | 0" | -- |
| 1972 | 90°F | 49°F | 0" | -- |
| 1971 | 67°F | 54°F | 0.28" | -- |
Based on 55 years of data from NOAA station: EL TORO MCAS
Monthly Climate Averages
Historical temperature and precipitation averages for Mission Viejo, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.