Ontario (CA)
January
Weather in Ontario, California for January 2027
Your guide to Ontario weather in January - trends and predictions
In general, the average temperature in Ontario at the beginning of January is 15.1 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 17.6 °C by the end of January.
The climate of Ontario in January is notably wet, with an average of 11 rainy days, and a total of 163.1 mm of precipitation.
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Temperatures
Rain 🌧️
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20
Dry days
11
Rainy days
0
Snow days
16°/8°
Temperatures
11 km/h
Avg max wind
47 %
Avg humidity
Ontario Weather January
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Temperatures trend during January in Ontario
See the weather trend as well as the moving average line
January weather in Ontario day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jan. 1 |  Partly cloudy | 17° /8° | 74.8 mm | 3 | |
| Jan. 2 |  Overcast | 18° /8° | 3.1 mm | 3 | |
| Jan. 3 |  Light rain shower | 14° /8° | 10.3 mm | 2 | |
| Jan. 4 | Overcast | 14° /5° | 32.2 mm | 3 | |
| Jan. 5 | Partly cloudy | 15° /8° | 12.2 mm | 3 | |
| Jan. 6 |  Sunny | 16° /8° | 0 mm | 3 | |
| Jan. 7 | Patchy rain possible | 12° /5° | 0.7 mm | 2 | |
| Jan. 8 |  Cloudy | 13° /5° | 0.1 mm | 3 | |
| Jan. 9 | Sunny | 16° /5° | 0 mm | 4 | |
| Jan. 10 | Sunny | 16° /5° | 0 mm | 3 | |
| Jan. 11 | Sunny | 17° /4° | 0 mm | 3 | |
| Jan. 12 | Sunny | 17° /5° | 0 mm | 4 | |
| Jan. 13 | Sunny | 17° /7° | 0 mm | 3 | |
| Jan. 14 | Sunny | 19° /9° | 0 mm | 4 | |
| Jan. 15 | Sunny | 19° /10° | 0 mm | 3 | |
| Jan. 16 | Sunny | 21° /8° | 0 mm | 4 | |
| Jan. 17 | Partly cloudy | 16° /7° | 0 mm | 3 | |
| Jan. 18 | Sunny | 17° /6° | 0 mm | 5 | |
| Jan. 19 | Sunny | 20° /10° | 0 mm | 3 | |
| Jan. 20 | Sunny | 18° /7° | 1.5 mm | 3 | |
| Jan. 21 | Overcast | 14° /7° | 3.7 mm | 2 | |
| Jan. 22 | Light rain shower | 15° /9° | 9.4 mm | 3 | |
| Jan. 23 | Patchy rain possible | 15° /7° | 0 mm | 3 | |
| Jan. 24 | Overcast | 17° /7° | 1.6 mm | 4 | |
| Jan. 25 | Overcast | 15° /6° | 0 mm | 3 | |
| Jan. 26 | Sunny | 14° /5° | 6.9 mm | 3 | |
| Jan. 27 | Sunny | 17° /8° | 6.5 mm | 3 | |
| Jan. 28 | Overcast | 17° /7° | 0 mm | 3 | |
| Jan. 29 | Overcast | 19° /8° | 0 mm | 3 | |
| Jan. 30 | Overcast | 20° /9° | 0 mm | 3 | |
| Jan. 31 | Partly cloudy | 21° /9° | 0 mm | 4 | |
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Important Notice
Our weather forecast for Ontario in January is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Ontario forecast closer to your planned date for the most up-to-date weather information.
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Ontario in January - FAQ
What are the expected maximum and minimum temperatures in Ontario during January?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Ontario during January?
Significant rainfall exceeding 163.1 mm is expected in Ontario during January, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Ontario during January?
The average wind speed in Ontario during January is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
January rainfall patterns in Ontario
Explore the daily rainfall trends and prepare for Ontarios January weather 💧
Typically, Ontario has 11 rainy days in January with a total of 163.1 mm of rainfall.
UV exposure in Ontario during January
Stay informed about UV levels for safe outdoor activities throughout the month of January ☀️
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