Weather on April 11
Ontario, CA
55 Years of Data
Avg High
73°F
Avg Low
49°F
Warmest
2025
73°F avg
Coldest
1975
48°F avg
About This Date
April 11th in Ontario, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 49°F. Over 42 years of records, the warmest April 11th was in 2025 (73°F average), while the coldest was 1975 (48°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 17% of April 11th dates historically, with the wettest April 11th recording 1.52" of rain. The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
Planning for April 11th in Ontario, CA? Great weather for outdoor activities.
Warming Trend
1.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 89° | 58° | 73° | — | — |
| 2024 | 88° | 54° | 71° | — | — |
| 2023 | 79° | 50° | 64° | — | — |
| 2022 | 66° | 52° | 59° | 0.08" | — |
| 2021 | 79° | 54° | 66° | — | — |
| 2020 | 69° | 47° | 58° | — | — |
| 2019 | 77° | 52° | 64° | — | — |
| 2018 | 84° | 56° | 70° | — | — |
| 2017 | 79° | 51° | 65° | — | — |
| 2016 | 76° | 55° | 65° | — | — |
| 2015 | 76° | 50° | 63° | — | — |
| 2014 | 86° | 55° | 71° | — | — |
| 2013 | 81° | 52° | 66° | — | — |
| 2012 | 60° | 49° | 54° | 0.86" | — |
| 2011 | 76° | 49° | 62° | — | — |
| 2010 | 60° | 50° | 55° | 0.23" | — |
| 2009 | 62° | 48° | 55° | — | — |
| 2008 | 90° | 51° | 70° | — | — |
| 2007 | 72° | 51° | 61° | — | — |
| 2006 | 69° | 50° | 60° | — | — |
| 2005 | 79° | 48° | 63° | — | — |
| 2004 | 87° | 52° | 69° | — | — |
| 2003 | 73° | 52° | 62° | — | — |
| 2002 | 81° | 50° | 65° | — | — |
| 2001 | 55° | 45° | 50° | 0.05" | — |
| 2000 | 88° | 51° | 69° | — | — |
| 1999 | 56° | 42° | 49° | 1.52" | — |
| 1998 | 61° | 45° | 53° | 0.69" | — |
| 1984 | 79° | 49° | 64° | — | — |
| 1983 | 59° | 45° | 52° | 0.28" | — |
| 1982 | 69° | 59° | 64° | — | — |
| 1981 | 71° | 52° | 61° | — | — |
| 1980 | 85° | 50° | 67° | — | — |
| 1979 | 68° | 41° | 55° | — | — |
| 1978 | 73° | 48° | 61° | — | — |
| 1977 | 65° | 42° | 53° | — | — |
| 1976 | 65° | 39° | 52° | — | — |
| 1975coldest | 59° | 38° | 48° | — | — |
| 1974 | 75° | 37° | 56° | — | — |
| 1973 | 76° | 40° | 58° | — | — |
| 1972 | 65° | 44° | 54° | — | — |
| 1971 | 78° | 45° | 61° | — | — |
42 years of data from ONTARIO INTL AP