Weather on October 28
Ontario, CA
55 Years of Data
Avg High
78°F
Avg Low
53°F
Warmest
2008
78°F avg
Coldest
1971
50°F avg
About This Date
October 28th in Ontario, CA typically brings pleasant fall weather, with average highs around 78°F and lows near 53°F — a 25°F daily swing. Over 40 years of records, the warmest October 28th was in 2008 (78°F average), while the coldest was 1971 (50°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 13% of October 28th dates historically, with the wettest October 28th recording 2.72" of rain. The last decade has been 7.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 7.7°F warmer on this date compared to 20-30 years ago.
Planning for October 28th in Ontario, CA? Great weather for outdoor activities.
Warming Trend
1.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 56° | 76° | — | — |
| 2024 | 72° | 55° | 63° | 0.15" | — |
| 2023 | 73° | 54° | 63° | — | — |
| 2022 | 81° | 51° | 66° | — | — |
| 2021 | 95° | 60° | 78° | — | — |
| 2020 | 81° | 50° | 65° | — | — |
| 2019 | 76° | 55° | 65° | — | — |
| 2018 | 89° | 57° | 73° | — | — |
| 2017 | 91° | 55° | 73° | — | — |
| 2016 | 80° | 63° | 71° | — | — |
| 2015 | 82° | 61° | 71° | — | — |
| 2014 | 84° | 58° | 71° | — | — |
| 2013 | 63° | 52° | 57° | 0.28" | — |
| 2012 | 90° | 54° | 72° | — | — |
| 2011 | 81° | 47° | 64° | — | — |
| 2010 | 84° | 47° | 65° | — | — |
| 2009 | 66° | 48° | 57° | — | — |
| 2008warmest | 97° | 60° | 78° | — | — |
| 2007 | 92° | 61° | 76° | — | — |
| 2006 | 88° | 50° | 69° | — | — |
| 2005 | 70° | 54° | 62° | — | — |
| 2004 | 63° | 50° | 56° | 0.08" | — |
| 2003 | 86° | 55° | 71° | — | — |
| 2002 | 73° | 48° | 61° | — | — |
| 2001 | 64° | 55° | 60° | — | — |
| 2000 | 65° | 52° | 58° | — | — |
| 1999 | 73° | 53° | 63° | — | — |
| 1998 | 76° | 49° | 62° | — | — |
| 1983 | 85° | 56° | 70° | — | — |
| 1981 | 71° | 49° | 60° | — | — |
| 1980 | 75° | 61° | 68° | — | — |
| 1979 | 71° | 49° | 60° | — | — |
| 1978 | 84° | 50° | 67° | — | — |
| 1977 | 73° | 47° | 60° | — | — |
| 1976 | 78° | 48° | 63° | — | — |
| 1975 | 74° | 42° | 58° | — | — |
| 1974 | 60° | 52° | 56° | 2.72" | — |
| 1973 | 90° | 52° | 71° | — | — |
| 1972 | 70° | 42° | 56° | — | — |
| 1971coldest | 55° | 45° | 50° | 0.81" | — |
40 years of data from ONTARIO INTL AP