Weather on October 12
Ontario, CA
55 Years of Data
Avg High
83°F
Avg Low
55°F
Warmest
2015
83°F avg
Coldest
1975
54°F avg
About This Date
October 12th in Ontario, CA typically brings warm fall weather, with average highs around 83°F and lows near 55°F — a 28°F daily swing. Over 41 years of records, the warmest October 12th was in 2015 (83°F average), while the coldest was 1975 (54°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 5% of October 12th dates historically, with the wettest October 12th recording 0.99" of rain. 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 October 12th in Ontario, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 56° | 69° | — | — |
| 2024 | 88° | 58° | 73° | — | — |
| 2023 | 87° | 55° | 71° | — | — |
| 2022 | 84° | 63° | 73° | — | — |
| 2021 | 73° | 54° | 63° | — | — |
| 2020 | 100° | 61° | 80° | — | — |
| 2019 | 87° | 49° | 68° | — | — |
| 2018 | 88° | 57° | 72° | 0.99" | — |
| 2017 | 80° | 56° | 68° | — | — |
| 2016 | 73° | 54° | 63° | — | — |
| 2015warmest | 95° | 71° | 83° | — | — |
| 2014 | 85° | 60° | 72° | — | — |
| 2013 | 79° | 51° | 65° | — | — |
| 2012 | 69° | 54° | 61° | — | — |
| 2011 | 100° | 60° | 80° | — | — |
| 2010 | 89° | 57° | 73° | — | — |
| 2009 | 64° | 51° | 58° | — | — |
| 2008 | 72° | 48° | 60° | — | — |
| 2007 | 71° | 54° | 62° | — | — |
| 2006 | 75° | 53° | 64° | — | — |
| 2005 | 83° | 54° | 68° | — | — |
| 2004 | 92° | 59° | 75° | — | — |
| 2003 | 91° | 59° | 75° | — | — |
| 2002 | 74° | 56° | 65° | — | — |
| 2001 | 91° | 53° | 72° | — | — |
| 2000 | 68° | 50° | 59° | — | — |
| 1999 | 97° | 58° | 77° | — | — |
| 1998 | 85° | 53° | 69° | — | — |
| 1983 | 92° | 57° | 74° | — | — |
| 1982 | 85° | 49° | 67° | — | — |
| 1981 | 69° | 49° | 59° | 0.23" | — |
| 1980 | 85° | 57° | 71° | — | — |
| 1979 | 78° | 49° | 63° | — | — |
| 1978 | 95° | 60° | 78° | — | — |
| 1977 | 91° | 57° | 74° | — | — |
| 1976 | 90° | 54° | 72° | — | — |
| 1975coldest | 64° | 44° | 54° | — | — |
| 1974 | 85° | 51° | 68° | — | — |
| 1973 | 81° | 47° | 64° | — | — |
| 1972 | 75° | 52° | 63° | — | — |
| 1971 | 94° | 60° | 77° | — | — |
41 years of data from ONTARIO INTL AP