Ontario Weather in January
Average highs run from 67°F on January 1 to 68°F on January 31, and lows from 44°F to 45°F. Normal precipitation for the month is 2.57 in over about 5 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 68°F
- Average low
- 45°F
- Precipitation
- 2.57 in
- Record high
- 90°FJan 31, 2003
- Record low
- 25°FJan 14, 2007
- Chance of a freeze
- 19%
- Daylight
- 9 h 56 min to 10 h 32 min
- Cloud cover
- 46%
- Humidity
- 57%
- Dew point
- 33°F
- Wind
- 6.9 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Jan 1 | 67°F | 44°F | 84°F 2012 | 31°F 2015 | 17% |
| Jan 2 | 67°F | 44°F | 85°F 2025 | 30°F 2015 | 17% |
| Jan 3 | 67°F | 44°F | 82°F 2012 | 33°F 2000 | 17% |
| Jan 4 | 67°F | 44°F | 85°F 2012 | 34°F 2011 | 17% |
| Jan 5 | 67°F | 44°F | 83°F 2006 | 34°F 2009 | 17% |
| Jan 6 | 67°F | 44°F | 85°F 2015 | 37°F 2004 | 17% |
| Jan 7 | 68°F | 44°F | 81°F 2015 | 38°F 2000 | 17% |
| Jan 8 | 68°F | 44°F | 87°F 2007 | 33°F 2000 | 17% |
| Jan 9 | 68°F | 44°F | 83°F 2007 | 36°F 2000 | 17% |
| Jan 10 | 68°F | 44°F | 78°F 1999 | 37°F 2024 | 17% |
| Jan 11 | 68°F | 45°F | 83°F 2009 | 32°F 2013 | 17% |
| Jan 12 | 68°F | 45°F | 87°F 2009 | 28°F 2013 | 16% |
| Jan 13 | 68°F | 45°F | 84°F 2018 | 29°F 2013 | 16% |
| Jan 14 | 68°F | 45°F | 87°F 2021 | 25°F 2007 | 16% |
| Jan 15 | 68°F | 45°F | 88°F 2021 | 31°F 2013 | 16% |
| Jan 16 | 68°F | 45°F | 88°F 2021 | 34°F 2006 | 16% |
| Jan 17 | 68°F | 45°F | 86°F 2014 | 32°F 2007 | 16% |
| Jan 18 | 68°F | 45°F | 83°F 2014 | 35°F 2007 | 16% |
| Jan 19 | 68°F | 45°F | 83°F 2005 | 34°F 2002 | 17% |
| Jan 20 | 68°F | 45°F | 84°F 2014 | 33°F 2002 | 17% |
| Jan 21 | 68°F | 45°F | 82°F 2013 | 33°F 2006 | 17% |
| Jan 22 | 68°F | 45°F | 81°F 2013 | 36°F 2006 | 17% |
| Jan 23 | 68°F | 45°F | 80°F 2013 | 36°F 2002 | 17% |
| Jan 24 | 68°F | 45°F | 77°F 2007 | 35°F 2002 | 17% |
| Jan 25 | 68°F | 45°F | 83°F 2003 | 35°F 2017 | 17% |
| Jan 26 | 68°F | 45°F | 84°F 2003 | 34°F 2002 | 18% |
| Jan 27 | 68°F | 45°F | 80°F 2024 | 37°F 2022 | 18% |
| Jan 28 | 68°F | 45°F | 84°F 2018 | 36°F 1999 | 18% |
| Jan 29 | 68°F | 45°F | 86°F 2018 | 34°F 2002 | 18% |
| Jan 30 | 68°F | 45°F | 83°F 2003 | 32°F 2002 | 18% |
| Jan 31 | 68°F | 45°F | 90°F 2003 | 31°F 2002 | 19% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PST).
- January 1
- sunrise 6:56 AM, sunset 4:52 PM
- January 31
- sunrise 6:48 AM, sunset 5:20 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00003102 (Ontario Intl AP), public domain. Records: NOAA GHCN-Daily, station USW00003102, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.