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Riverside, CA Weather on May 27
May 27th in Riverside, CA typically brings warm spring weather, with average highs around 81°F and lows near 55°F — a 26°F daily swing. Over 55 years of records, the warmest May 27th was in 2000 (80°F average), while the coldest was 1980 (57°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 2% of May 27th dates historically. The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
What to Expect on May 27
Planning for May 27th in Riverside, CA? Stay hydrated and seek shade during peak afternoon hours.
May 27 Weather Records for Riverside
- •The all-time record high for May 27th in Riverside, CA is 102°F, set in 2000.
- •The coldest May 27th on record dropped to 46°F in 1998.
- •Temperatures have reached 90°F or higher on May 27th in 8 of the last 55 years.
- •Last year (1971), May 27th was 8°F cooler than the long-term average.
Frequently Asked Questions
What was the warmest May 27 ever in Riverside?
The warmest May 27 in Riverside, CA reached 102°F in 2000. That is 21°F above the long-term average high of 81°F.
What was the coldest May 27 ever in Riverside?
The coldest May 27 in Riverside, CA dropped to 46°F in 1998. That is 9°F below the long-term average low of 55°F.
What is the average temperature on May 27 in Riverside?
On May 27, Riverside averages a high of 81°F and a low of 55°F based on 55 years of NOAA weather observations from RIVERSIDE CITRUS EXP.
How many years of weather data are available for May 27 in Riverside?
We have 55 years of weather records for May 27 in Riverside, 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 Riverside
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 85°F | 59°F | 0" | -- |
| 2024 | 81°F | 53°F | 0" | -- |
| 2023 | 76°F | 55°F | 0" | -- |
| 2022 | 82°F | 55°F | 0" | -- |
| 2021 | 80°F | 54°F | 0" | -- |
| 2020 | 96°F | 61°F | 0" | -- |
| 2019 | 70°F | 47°F | 0" | -- |
| 2018 | 80°F | 54°F | 0" | -- |
| 2017 | 79°F | 56°F | 0" | -- |
| 2016 | 83°F | 53°F | 0" | -- |
| 2015 | 80°F | 59°F | 0" | -- |
| 2014 | 95°F | 62°F | 0" | -- |
| 2013 | 82°F | 54°F | 0" | -- |
| 2012 | 81°F | 49°F | 0" | -- |
| 2011 | 84°F | 55°F | 0" | -- |
| 2010 | 74°F | 58°F | 0" | -- |
| 2009 | 88°F | 56°F | 0" | -- |
| 2008 | 71°F | 48°F | 0" | -- |
| 2007 | 85°F | 55°F | 0" | -- |
| 2006 | 76°F | 59°F | 0" | -- |
| 2005 | 84°F | 55°F | 0" | -- |
| 2004 | 78°F | 50°F | 0" | -- |
| 2003 | 98°F | 56°F | 0" | -- |
| 2002 | 79°F | 53°F | 0" | -- |
| 2001 | 72°F | 59°F | 0" | -- |
| 2000 | 102°F | 57°F | 0" | -- |
| 1999 | 88°F | 57°F | 0" | -- |
| 1998 | 76°F | 46°F | 0" | -- |
| 1997 | 96°F | 59°F | 0" | -- |
| 1996 | 72°F | 51°F | 0" | -- |
| 1995 | 75°F | 52°F | 0" | -- |
| 1994 | 83°F | 51°F | 0" | -- |
| 1993 | 78°F | 51°F | 0" | -- |
| 1992 | 81°F | 60°F | 0" | -- |
| 1991 | 72°F | 54°F | 0" | -- |
| 1990 | 74°F | 50°F | 0" | -- |
| 1989 | 82°F | 52°F | 0" | -- |
| 1988 | 78°F | 55°F | 0" | -- |
| 1987 | 67°F | 54°F | 0" | -- |
| 1986 | 89°F | 58°F | 0" | -- |
| 1985 | 78°F | 54°F | 0" | -- |
| 1984 | 95°F | 60°F | 0" | -- |
| 1983 | 95°F | 61°F | 0" | -- |
| 1982 | 62°F | 56°F | 0" | -- |
| 1981 | 76°F | 61°F | 0" | -- |
| 1980 | 65°F | 50°F | 0" | -- |
| 1979 | 78°F | 61°F | 0" | -- |
| 1978 | 76°F | 49°F | 0" | -- |
| 1977 | 75°F | 49°F | 0" | -- |
| 1976 | 88°F | 55°F | 0" | -- |
| 1975 | 77°F | 56°F | 0" | -- |
| 1974 | 98°F | 56°F | 0" | -- |
| 1973 | 78°F | 51°F | 0" | -- |
| 1972 | 82°F | 53°F | 0" | -- |
| 1971 | 73°F | 49°F | 0.05" | -- |
Based on 55 years of data from NOAA station: RIVERSIDE CITRUS EXP
Monthly Climate Averages
Historical temperature and precipitation averages for Riverside, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.