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January Weather in Waterloo, Canada

Last updated: June 18, 2025

In January, the average temperature in Waterloo, Canada hovers around -8°C (18°F), though it can drop as low as -32°C (-25°F) and spike to a maximum of 12°C (54°F). Expect considerable precipitation, averaging 93 mm (3.7 in) over 13 days, paired with a high humidity level of 93%. Be prepared for a cold and damp month!

January Temperature in Waterloo

In January in Waterloo, the average temperature is -8°C (18°F), with maximums reaching 12°C (54°F) and minimums plummeting to -32°C (-25°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!

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

The chart illustrates January temperature patterns in Waterloo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waterloo, January typically has an average temperature of -8°C (18°F), with highs reaching up to 12°C (54°F) and lows dropping to around -32°C (-25°F).
JanFebMarAprMayJunJulAugSepOctNovDec172028415563696759483323
Data source: Temperature data for Waterloo 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 Waterloo

In Waterloo in January, the total precipitation amount is 93 mm (3.7 in), which falls over the course of 13 days.

January Precipitation Trends in Waterloo

The chart displays monthly precipitation patterns in Waterloo, 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 Waterloo, January typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec9389901201071261231288414712586
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Waterloo

In Waterloo in January humidity is 93%. With an average temperature of -8°C (18°F), this humidity feels like a bone-chilling dampness that seeps into your clothes, making even the briefest moments outside feel uncomfortable and heavy, as if you're trudging through a misty, cold cloud that wraps around you.

January Average Humidity in Waterloo

This chart illustrates the average monthly humidity levels in Waterloo, 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 Waterloo is approximately 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Waterloo

In Waterloo 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 Waterloo, you can visit Hourly UV Index in Waterloo.

Maximum UV Index Levels in Waterloo for January

The chart shows the monthly maximum UV Index (UVI) for Waterloo 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 Waterloo typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799987532
Data source: Waterloo 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 Waterloo Compares to Other Months

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

This table compares monthly weather conditions in Waterloo, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)93 mm (3.7 inches)93%low
February Weather-7°C (20°F)89 mm (3.5 inches)92%moderate
March Weather-2°C (28°F)90 mm (3.5 inches)86%moderate
April Weather5°C (42°F)120 mm (4.7 inches)85%high
May Weather13°C (55°F)106 mm (4.2 inches)80%very high
June Weather17°C (64°F)126 mm (5.0 inches)74%very high
July Weather20°C (69°F)123 mm (4.8 inches)76%very high
August Weather19°C (67°F)128 mm (5.0 inches)75%very high
September Weather15°C (60°F)84 mm (3.3 inches)78%high
October Weather9°C (49°F)147 mm (5.8 inches)86%moderate
November Weather1°C (33°F)125 mm (4.9 inches)88%moderate
December Weather-5°C (23°F)86 mm (3.4 inches)89%low

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