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 14.8 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 17.3 °C by the end of January.
With an average of 4 rainy days, Ontario experiences minimal rainfall in January.
Is January a good time to visit Ontario? check out the best time to travel to Ontario page.
✨ Is January a good time to visit Ontario? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
27
Dry days
4
Rainy days
0
Snow days
16°/8°
Temperatures
11 km/h
Avg max wind
48 %
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 |  Heavy rain | 16° /9° | 74.8 mm | 2.9 | |
| Jan. 2 |  Light rain | 17° /8° | 3.1 mm | 2.9 | |
| Jan. 3 |  Moderate rain | 13° /8° | 10.3 mm | 2 | |
| Jan. 4 | Heavy rain | 14° /5° | 32.2 mm | 2.9 | |
| Jan. 5 | Moderate rain | 15° /8° | 12.2 mm | 2.9 | |
| Jan. 6 |  Sunny | 16° /9° | 0 mm | 2.9 | |
| Jan. 7 |  Patchy rain possible | 12° /5° | 0.7 mm | 2 | |
| Jan. 8 |  Cloudy | 13° /6° | 0.1 mm | 3 | |
| Jan. 9 | Sunny | 16° /5° | 0 mm | 3 | |
| Jan. 10 | Sunny | 16° /6° | 0 mm | 3 | |
| Jan. 11 | Sunny | 16° /5° | 0 mm | 3 | |
| Jan. 12 | Sunny | 16° /5° | 0 mm | 3.1 | |
| Jan. 13 | Sunny | 17° /8° | 0 mm | 3 | |
| Jan. 14 | Sunny | 18° /9° | 0 mm | 3.2 | |
| Jan. 15 | Sunny | 19° /11° | 0 mm | 3 | |
| Jan. 16 | Sunny | 21° /8° | 0 mm | 3.2 | |
| Jan. 17 |  Partly cloudy | 15° /7° | 0 mm | 3 | |
| Jan. 18 | Sunny | 21° /8° | 0 mm | 3.3 | |
| Jan. 19 | Sunny | 20° /10° | 0 mm | 3 | |
| Jan. 20 | Patchy rain possible | 17° /8° | 1.5 mm | 3 | |
| Jan. 21 | Light rain | 14° /8° | 3.7 mm | 2 | |
| Jan. 22 | Light rain | 15° /9° | 9.4 mm | 3 | |
| Jan. 23 | Patchy rain possible | 14° /8° | 0 mm | 3 | |
| Jan. 24 | Patchy rain possible | 17° /8° | 1.6 mm | 3.5 | |
| Jan. 25 |  Overcast | 14° /7° | 0 mm | 3 | |
| Jan. 26 | Light rain | 14° /6° | 6.9 mm | 3 | |
| Jan. 27 | Light rain | 17° /8° | 6.5 mm | 3 | |
| Jan. 28 | Overcast | 17° /7° | 0 mm | 3 | |
| Jan. 29 | Overcast | 18° /8° | 0 mm | 3 | |
| Jan. 30 | Overcast | 20° /10° | 0 mm | 3 | |
| Jan. 31 | Partly cloudy | 21° /10° | 0 mm | 3.9 | |
| Next | |||||
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.
Change Month
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 4 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 4 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 ☀️
Quick links
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