Weather on April 27
Ontario, CA
55 Years of Data
Avg High
76°F
Avg Low
51°F
Warmest
2008
82°F avg
Coldest
1971
51°F avg
About This Date
April 27th in Ontario, CA typically brings pleasant spring weather, with average highs around 76°F and lows near 51°F — a 25°F daily swing. Over 42 years of records, the warmest April 27th was in 2008 (82°F average), while the coldest was 1971 (51°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 2% of April 27th dates historically. 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 April 27th in Ontario, CA? Great weather for outdoor activities.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 62° | 48° | 55° | — | — |
| 2024 | 73° | 51° | 62° | — | — |
| 2023 | 86° | 54° | 70° | — | — |
| 2022 | 77° | 53° | 65° | — | — |
| 2021 | 69° | 51° | 60° | — | — |
| 2020 | 86° | 61° | 73° | — | — |
| 2019 | 79° | 59° | 69° | — | — |
| 2018 | 76° | 53° | 64° | — | — |
| 2017 | 78° | 55° | 67° | — | — |
| 2016 | 73° | 52° | 62° | — | — |
| 2015 | 86° | 54° | 70° | — | — |
| 2014 | 70° | 48° | 59° | — | — |
| 2013 | 87° | 55° | 71° | — | — |
| 2012 | 74° | 54° | 64° | — | — |
| 2011 | 87° | 52° | 69° | — | — |
| 2010 | 73° | 51° | 62° | — | — |
| 2009 | 71° | 50° | 61° | — | — |
| 2008warmest | 97° | 67° | 82° | — | — |
| 2007 | 94° | 56° | 75° | — | — |
| 2006 | 67° | 53° | 60° | — | — |
| 2005 | 69° | 54° | 61° | — | — |
| 2004 | 100° | 62° | 81° | — | — |
| 2003 | 71° | 46° | 59° | — | — |
| 2002 | 61° | 50° | 55° | — | — |
| 2001 | 75° | 53° | 64° | — | — |
| 2000 | 81° | 57° | 69° | — | — |
| 1999 | 75° | 50° | 63° | 0.05" | — |
| 1998 | 87° | 44° | 66° | — | — |
| 1984 | 67° | 41° | 54° | — | — |
| 1983 | 69° | 49° | 59° | — | — |
| 1982 | 77° | 47° | 62° | — | — |
| 1981 | 77° | 49° | 63° | — | — |
| 1980 | 72° | 51° | 61° | — | — |
| 1979 | 76° | 46° | 61° | — | — |
| 1978 | 72° | 45° | 58° | — | — |
| 1977 | 72° | 52° | 62° | — | — |
| 1976 | 68° | 48° | 58° | — | — |
| 1975 | 67° | 36° | 51° | — | — |
| 1974 | 76° | 39° | 57° | — | — |
| 1973 | 77° | 45° | 61° | — | — |
| 1972 | 87° | 48° | 68° | — | — |
| 1971coldest | 67° | 36° | 51° | — | — |
42 years of data from ONTARIO INTL AP