Weather on October 19
Ontario, CA
55 Years of Data
Avg High
81°F
Avg Low
55°F
Warmest
2023
81°F avg
Coldest
1972
54°F avg
About This Date
October 19th in Ontario, CA typically brings warm fall weather, with average highs around 81°F and lows near 55°F — a 26°F daily swing. Over 41 years of records, the warmest October 19th was in 2023 (81°F average), while the coldest was 1972 (54°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 7% of October 19th dates historically, with the wettest October 19th recording 0.56" of rain. The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
Planning for October 19th in Ontario, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 57° | 72° | — | — |
| 2024 | 82° | 58° | 70° | — | — |
| 2023warmest | 98° | 64° | 81° | — | — |
| 2022 | 95° | 60° | 78° | — | — |
| 2021 | 76° | 50° | 63° | — | — |
| 2020 | 85° | 59° | 72° | — | — |
| 2019 | 82° | 53° | 68° | — | — |
| 2018 | 89° | 59° | 74° | — | — |
| 2017 | 78° | 59° | 69° | — | — |
| 2016 | 92° | 54° | 73° | — | — |
| 2015 | 75° | 61° | 68° | — | — |
| 2014 | 81° | 57° | 69° | — | — |
| 2013 | 90° | 54° | 72° | — | — |
| 2012 | 84° | 61° | 72° | — | — |
| 2011 | 78° | 54° | 66° | — | — |
| 2010 | 68° | 59° | 64° | 0.05" | — |
| 2009 | 73° | 60° | 67° | — | — |
| 2008 | 81° | 54° | 67° | — | — |
| 2007 | 92° | 56° | 74° | — | — |
| 2006 | 84° | 52° | 68° | — | — |
| 2005 | 73° | 54° | 63° | — | — |
| 2004 | 66° | 56° | 61° | 0.18" | — |
| 2003 | 98° | 61° | 79° | — | — |
| 2002 | 74° | 53° | 63° | — | — |
| 2001 | 84° | 55° | 70° | — | — |
| 2000 | 79° | 57° | 68° | — | — |
| 1999 | 95° | 51° | 73° | — | — |
| 1998 | 85° | 53° | 69° | — | — |
| 1983 | 84° | 50° | 67° | — | — |
| 1982 | 78° | 54° | 66° | — | — |
| 1981 | 90° | 69° | 79° | — | — |
| 1980 | 85° | 51° | 68° | — | — |
| 1979 | 68° | 58° | 63° | — | — |
| 1978 | 86° | 54° | 70° | — | — |
| 1977 | 73° | 52° | 62° | — | — |
| 1976 | 80° | 51° | 66° | — | — |
| 1975 | 67° | 43° | 55° | — | — |
| 1974 | 81° | 57° | 69° | — | — |
| 1973 | 90° | 58° | 74° | — | — |
| 1972coldest | 62° | 46° | 54° | 0.56" | — |
| 1971 | 72° | 40° | 56° | — | — |
41 years of data from ONTARIO INTL AP