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West Covina, CA Weather on April 21
April 21st in West Covina, CA typically brings pleasant spring weather, with average highs around 78°F and lows near 51°F — a 27°F daily swing. Over 55 years of records, the warmest April 21st was in 2009 (83°F average), while the coldest was 2001 (52°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 5% of April 21st dates historically, with the wettest April 21st recording 3.86" of rain. The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
What to Expect on April 21
Planning for April 21st in West Covina, CA? Great weather for outdoor activities.
April 21 Weather Records for West Covina
- •The all-time record high for April 21st in West Covina, CA is 104°F, set in 2009.
- •The coldest April 21st on record dropped to 41°F in 2010.
- •Temperatures have reached 90°F or higher on April 21st in 10 of the last 55 years.
- •Last year (1971), April 21st was 13°F cooler than the long-term average.
Frequently Asked Questions
What was the warmest April 21 ever in West Covina?
The warmest April 21 in West Covina, CA reached 104°F in 2009. That is 26°F above the long-term average high of 78°F.
What was the coldest April 21 ever in West Covina?
The coldest April 21 in West Covina, CA dropped to 41°F in 2010. That is 10°F below the long-term average low of 51°F.
What is the average temperature on April 21 in West Covina?
On April 21, West Covina averages a high of 78°F and a low of 51°F based on 55 years of NOAA weather observations from SANTA FE DAM CALIFORNIA.
How many years of weather data are available for April 21 in West Covina?
We have 55 years of weather records for April 21 in West Covina, CA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
April 21 Weather History in West Covina
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 77°F | 51°F | -- | -- |
| 2024 | 82°F | 50°F | -- | -- |
| 2023 | 92°F | 64°F | -- | -- |
| 2022 | 73°F | 49°F | -- | -- |
| 2021 | 63°F | 56°F | -- | -- |
| 2020 | 75°F | 55°F | -- | -- |
| 2019 | 72°F | 53°F | -- | -- |
| 2018 | 90°F | 49°F | -- | -- |
| 2017 | 95°F | 55°F | -- | -- |
| 2016 | 88°F | 56°F | -- | -- |
| 2015 | 68°F | 59°F | -- | -- |
| 2014 | 89°F | 53°F | -- | -- |
| 2013 | 90°F | 51°F | -- | -- |
| 2012 | 91°F | 56°F | -- | -- |
| 2011 | 75°F | 47°F | -- | -- |
| 2010 | 62°F | 41°F | -- | -- |
| 2009 | 104°F | 63°F | -- | -- |
| 2008 | 75°F | 46°F | -- | -- |
| 2007 | 68°F | 45°F | -- | -- |
| 2006 | 76°F | 50°F | -- | -- |
| 2005 | 87°F | 47°F | -- | -- |
| 2004 | 73°F | 51°F | -- | -- |
| 2003 | 68°F | 49°F | -- | -- |
| 2002 | 79°F | 49°F | -- | -- |
| 2001 | 60°F | 44°F | -- | -- |
| 2000 | 61°F | 52°F | -- | -- |
| 1999 | 68°F | 50°F | -- | -- |
| 1998 | 97°F | 55°F | -- | -- |
| 1997 | 93°F | 56°F | -- | -- |
| 1996 | 76°F | 49°F | -- | -- |
| 1995 | 71°F | 44°F | -- | -- |
| 1994 | 69°F | 57°F | -- | -- |
| 1993 | 90°F | 54°F | 0" | -- |
| 1992 | 86°F | 54°F | 0" | -- |
| 1991 | 70°F | 54°F | 0.08" | -- |
| 1990 | 77°F | 55°F | 0" | -- |
| 1989 | 81°F | 58°F | 0" | -- |
| 1988 | 66°F | 43°F | 3.86" | -- |
| 1987 | 94°F | 51°F | 0" | -- |
| 1986 | 89°F | 55°F | 0" | -- |
| 1985 | 63°F | 44°F | 0" | -- |
| 1984 | 84°F | 46°F | 0" | -- |
| 1983 | 68°F | 52°F | 1.91" | -- |
| 1982 | 89°F | 52°F | -- | -- |
| 1981 | 80°F | 48°F | 0" | -- |
| 1980 | 70°F | 55°F | 0" | -- |
| 1979 | 81°F | 46°F | 0" | -- |
| 1978 | 72°F | 47°F | 0" | -- |
| 1977 | 84°F | 45°F | 0" | -- |
| 1976 | 79°F | 52°F | 0" | -- |
| 1975 | 76°F | 50°F | 0" | -- |
| 1974 | 82°F | 45°F | 0" | -- |
| 1973 | 77°F | 43°F | 0" | -- |
| 1972 | 80°F | 43°F | 0" | -- |
| 1971 | 65°F | 47°F | 0" | -- |
Based on 55 years of data from NOAA station: SANTA FE DAM CALIFORNIA
Monthly Climate Averages
Historical temperature and precipitation averages for West Covina, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.