Weather on May 18
Riverside, CA
55 Years of Data
Avg High
81°F
Avg Low
54°F
Warmest
2008
83°F avg
Coldest
1994
55°F avg
About This Date
May 18th in Riverside, CA typically brings warm spring weather, with average highs around 81°F and lows near 54°F — a 27°F daily swing. Over 55 years of records, the warmest May 18th was in 2008 (83°F average), while the coldest was 1994 (55°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 5% of May 18th dates historically, with the wettest May 18th recording 0.79" of rain. The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
Planning for May 18th in Riverside, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 57° | 65° | — | — |
| 2024 | 77° | 55° | 66° | — | — |
| 2023 | 79° | 56° | 67° | — | — |
| 2022 | 84° | 56° | 70° | — | — |
| 2021 | 79° | 58° | 68° | — | — |
| 2020 | 73° | 58° | 65° | — | — |
| 2019 | 75° | 49° | 62° | — | — |
| 2018 | 75° | 55° | 65° | — | — |
| 2017 | 83° | 48° | 65° | — | — |
| 2016 | 82° | 60° | 71° | — | — |
| 2015 | 73° | 57° | 65° | — | — |
| 2014 | 94° | 62° | 78° | — | — |
| 2013 | 80° | 60° | 70° | — | — |
| 2012 | 78° | 48° | 63° | — | — |
| 2011 | 66° | 51° | 59° | 0.79" | — |
| 2010 | 73° | 54° | 63° | 0.03" | — |
| 2009 | 98° | 60° | 79° | — | — |
| 2008warmest | 98° | 68° | 83° | — | — |
| 2007 | 83° | 56° | 69° | — | — |
| 2006 | 85° | 60° | 72° | — | — |
| 2005 | 79° | 54° | 66° | — | — |
| 2004 | 79° | 59° | 69° | — | — |
| 2003 | 80° | 54° | 67° | — | — |
| 2002 | 79° | 55° | 67° | — | — |
| 2001 | 78° | 59° | 69° | — | — |
| 2000 | 91° | 50° | 71° | — | — |
| 1999 | 87° | 52° | 69° | — | — |
| 1998 | 84° | 48° | 66° | — | — |
| 1997 | 83° | 64° | 73° | — | — |
| 1996 | 83° | 55° | 69° | — | — |
| 1995 | 79° | 52° | 65° | — | — |
| 1994coldest | 65° | 46° | 55° | 0.05" | — |
| 1993 | 83° | 54° | 68° | — | — |
| 1992 | 88° | 55° | 71° | — | — |
| 1991 | 70° | 45° | 57° | — | — |
| 1990 | 78° | 53° | 66° | — | — |
| 1989 | 75° | 55° | 65° | — | — |
| 1988 | 81° | 51° | 66° | — | — |
| 1987 | 78° | 60° | 69° | — | — |
| 1986 | 97° | 55° | 76° | — | — |
| 1985 | 80° | 47° | 63° | — | — |
| 1984 | 87° | 52° | 69° | — | — |
| 1983 | 90° | 51° | 70° | — | — |
| 1982 | 74° | 53° | 63° | — | — |
| 1981 | 82° | 52° | 67° | — | — |
| 1980 | 87° | 54° | 70° | — | — |
| 1979 | 80° | 54° | 67° | — | — |
| 1978 | 88° | 50° | 69° | — | — |
| 1977 | 72° | 45° | 58° | — | — |
| 1976 | 90° | 52° | 71° | — | — |
| 1975 | 77° | 51° | 64° | — | — |
| 1974 | 72° | 49° | 60° | — | — |
| 1973 | 85° | 55° | 70° | — | — |
| 1972 | 76° | 56° | 66° | — | — |
| 1971 | 83° | 54° | 68° | — | — |
55 years of data from RIVERSIDE CITRUS EXP