Weather on February 21
Rialto, CA
55 Years of Data
Avg High
67°F
Avg Low
45°F
Warmest
2002
72°F avg
Coldest
1993
43°F avg
About This Date
February 21st in Rialto, CA typically brings mild winter weather, with average highs around 67°F and lows near 45°F. Over 49 years of records, the warmest February 21st was in 2002 (72°F average), while the coldest was 1993 (43°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 4% of February 21st dates historically, with the wettest February 21st recording 3.33" of rain.
Planning for February 21st in Rialto, CA? Great weather for outdoor activities.
Cooling Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 68° | 35° | 51° | — | — |
| 2025 | 77° | 48° | 62° | — | — |
| 2017 | 65° | 52° | 58° | — | — |
| 2016 | 77° | 49° | 63° | — | — |
| 2015 | 61° | 47° | 54° | — | — |
| 2014 | 77° | 53° | 65° | — | — |
| 2013 | 56° | 35° | 45° | — | — |
| 2012 | 70° | 51° | 60° | — | — |
| 2011 | 54° | 35° | 44° | — | — |
| 2010 | 52° | 45° | 48° | — | — |
| 2009 | 69° | 51° | 60° | — | — |
| 2008 | 51° | 43° | 47° | — | — |
| 2007 | 66° | 42° | 54° | — | — |
| 2006 | 60° | 35° | 48° | — | — |
| 2005 | 51° | 45° | 48° | — | — |
| 2004 | 51° | 42° | 47° | — | — |
| 2003 | 76° | 48° | 62° | — | — |
| 2002warmest | 81° | 63° | 72° | — | — |
| 2001 | 67° | 38° | 52° | — | — |
| 2000 | 46° | 39° | 43° | — | — |
| 1999 | 64° | 45° | 54° | — | — |
| 1998 | 59° | 38° | 48° | — | — |
| 1997 | 76° | 48° | 62° | — | — |
| 1996 | 51° | 48° | 50° | — | — |
| 1995 | 63° | 49° | 56° | — | — |
| 1994 | 58° | 38° | 48° | 0.18" | — |
| 1993coldest | 48° | 38° | 43° | — | — |
| 1992 | 71° | 49° | 60° | — | — |
| 1991 | 79° | 53° | 66° | — | — |
| 1990 | 72° | 38° | 55° | — | — |
| 1989 | 76° | 43° | 59° | — | — |
| 1988 | 80° | 44° | 62° | — | — |
| 1987 | 66° | 41° | 54° | — | — |
| 1986 | 73° | 62° | 68° | — | — |
| 1985 | 70° | 50° | 60° | — | — |
| 1984 | 72° | 40° | 56° | — | — |
| 1983 | 80° | 44° | 62° | — | — |
| 1982 | 83° | 49° | 66° | — | — |
| 1981 | 78° | 57° | 68° | — | — |
| 1980 | 65° | 51° | 58° | — | — |
| 1979 | 54° | 45° | 49° | 3.33" | — |
| 1978 | 82° | 43° | 62° | — | — |
| 1977 | 73° | 46° | 60° | — | — |
| 1976 | 71° | 40° | 55° | — | — |
| 1975 | 58° | 47° | 52° | — | — |
| 1974 | 71° | 36° | 53° | — | — |
| 1973 | 63° | 51° | 57° | — | — |
| 1972 | 71° | 44° | 58° | — | — |
| 1971 | 68° | 33° | 51° | — | — |
49 years of data from DEVORE CALIFORNIA