Weather on March 18
Riverside, CA
55 Years of Data
Avg High
74°F
Avg Low
46°F
Warmest
2026
79°F avg
Coldest
2006
48°F avg
About This Date
March 18th in Riverside, CA typically brings pleasant spring weather, with average highs around 74°F and lows near 46°F — a 28°F daily swing. Over 56 years of records, the warmest March 18th was in 2026 (79°F average), while the coldest was 2006 (48°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 14% of March 18th dates historically, with the wettest March 18th recording 2.74" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for March 18th in Riverside, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 98° | 61° | 79° | — | — |
| 2025 | 66° | 43° | 54° | — | — |
| 2024 | 77° | 45° | 61° | — | — |
| 2023 | 74° | 44° | 59° | — | — |
| 2022 | 81° | 49° | 65° | — | — |
| 2021 | 71° | 44° | 58° | — | — |
| 2020 | 57° | 39° | 48° | — | — |
| 2019 | 82° | 49° | 65° | — | — |
| 2018 | 64° | 40° | 52° | — | — |
| 2017 | 83° | 51° | 67° | — | — |
| 2016 | 80° | 52° | 66° | — | — |
| 2015 | 75° | 56° | 65° | — | — |
| 2014 | 80° | 52° | 66° | — | — |
| 2013 | 66° | 51° | 59° | — | — |
| 2012 | 56° | 42° | 49° | 0.23" | — |
| 2011 | 71° | 44° | 58° | — | — |
| 2010 | 79° | 51° | 65° | — | — |
| 2009 | 87° | 51° | 69° | — | — |
| 2008 | 77° | 41° | 59° | — | — |
| 2007 | 68° | 52° | 60° | — | — |
| 2006coldest | 58° | 39° | 48° | 0.03" | — |
| 2005 | 62° | 48° | 55° | 0.38" | — |
| 2004 | 84° | 46° | 65° | — | — |
| 2003 | 71° | 39° | 55° | — | — |
| 2002 | 65° | 38° | 51° | — | — |
| 2001 | 83° | 45° | 64° | — | — |
| 2000 | 85° | 44° | 64° | — | — |
| 1999 | 69° | 41° | 55° | — | — |
| 1998 | 74° | 55° | 64° | — | — |
| 1997 | 91° | 46° | 69° | — | — |
| 1996 | 78° | 51° | 65° | — | — |
| 1995 | 74° | 57° | 65° | — | — |
| 1994 | 80° | 49° | 64° | — | — |
| 1993 | 75° | 57° | 66° | — | — |
| 1992 | 69° | 49° | 59° | — | — |
| 1991 | 71° | 41° | 56° | — | — |
| 1990 | 85° | 45° | 65° | — | — |
| 1989 | 77° | 45° | 61° | — | — |
| 1988 | 85° | 43° | 64° | — | — |
| 1987 | 70° | 45° | 57° | — | — |
| 1986 | 70° | 38° | 54° | — | — |
| 1985 | 63° | 44° | 53° | 0.25" | — |
| 1984 | 79° | 50° | 64° | — | — |
| 1983 | 59° | 47° | 53° | 1.75" | — |
| 1982 | 58° | 40° | 49° | 2.74" | — |
| 1981 | 75° | 43° | 59° | — | — |
| 1980 | 72° | 44° | 58° | 0.23" | — |
| 1979 | 58° | 49° | 53° | 1.78" | — |
| 1978 | 83° | 46° | 64° | — | — |
| 1977 | 68° | 37° | 53° | — | — |
| 1976 | 75° | 44° | 60° | — | — |
| 1975 | 75° | 39° | 57° | — | — |
| 1974 | 76° | 52° | 64° | — | — |
| 1973 | 67° | 43° | 55° | — | — |
| 1972 | 64° | 51° | 58° | — | — |
| 1971 | 76° | 44° | 60° | — | — |
56 years of data from RIVERSIDE MUNI AP