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January Weather in Oshawa, Canada

Last updated: June 18, 2025

In Oshawa, Canada during January, the average temperature hovers around -5°C (23°F). The climate can be quite extreme, with temperatures dipping as low as -28°C (-19°F) and peaking at a mild 11°C (52°F). Expect about 65 mm (2.5 in) of precipitation spread over 9 days, accompanied by a high humidity level of 91%. Stay prepared for chilly days and wet weather!

January Temperature in Oshawa

In January in Oshawa, the average temperature is -5°C (23°F), with maximums reaching up to 11°C (52°F) and minimums plummeting as low as -28°C (-19°F). Therefore, it's essential to prepare for extreme cold and fluctuating temperatures when planning your travels to Oshawa during this time.

January Weather in Oshawa: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Oshawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oshawa, January typically has an average temperature of -5°C (23°F), with highs reaching up to 11°C (52°F) and lows dropping to around -28°C (-19°F).
JanFebMarAprMayJunJulAugSepOctNovDec232432435566727063513729
Data source: Temperature data for Oshawa generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Oshawa

In Oshawa in January, the precipitation amount is 65 mm (2.5 in) over the course of 9 days.

January Precipitation Trends in Oshawa

The chart displays monthly precipitation patterns in Oshawa, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Oshawa, January typically receives around 65 mm (2.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec65696211298909310873998375
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Oshawa

In Oshawa in January, humidity is 91%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and pushing you to seek warmth at every opportunity.

January Average Humidity in Oshawa

This chart illustrates the average monthly humidity levels in Oshawa, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Oshawa is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Oshawa

In Oshawa in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Oshawa, you can visit Hourly UV Index in Oshawa.

Maximum UV Index Levels in Oshawa for January

The chart shows the monthly maximum UV Index (UVI) for Oshawa in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Oshawa typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Oshawa January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How January Weather in Oshawa Compares to Other Months

Weather in Oshawa varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Oshawa, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Oshawa, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)65 mm (2.5 inches)91%low
February Weather-4°C (24°F)69 mm (2.7 inches)91%moderate
March Weather0°C (32°F)62 mm (2.4 inches)88%moderate
April Weather6°C (43°F)112 mm (4.4 inches)88%very high
May Weather13°C (56°F)98 mm (3.9 inches)82%very high
June Weather19°C (66°F)90 mm (3.5 inches)79%very high
July Weather22°C (72°F)92 mm (3.6 inches)77%very high
August Weather21°C (70°F)108 mm (4.2 inches)72%very high
September Weather17°C (63°F)73 mm (2.9 inches)76%high
October Weather11°C (51°F)99 mm (3.9 inches)83%moderate
November Weather3°C (37°F)83 mm (3.2 inches)88%moderate
December Weather-2°C (29°F)75 mm (2.9 inches)87%low

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