nomadseason

January Weather in Perth, Canada

Last updated: June 18, 2025

In Perth, Canada, the average temperature in January hovers around -8°C (18°F), with extremes ranging from a bone-chilling -31°C (-23°F) to a milder 10°C (51°F). Expect about 72 mm (2.8 in) of precipitation over 9 days, accompanied by a high average humidity of 93%. Stay warm and prepared for the varied climate!

January Temperature in Perth

In January in Perth, the average temperature is -8°C (18°F). Maximum temperatures can reach 10°C (51°F), while minimums can plunge as low as -31°C (-23°F). Travelers should be prepared for extreme cold and varying temperatures during this month.

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

The chart illustrates January temperature patterns in Perth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Perth, January typically has an average temperature of -8°C (18°F), with highs reaching up to 10°C (51°F) and lows dropping to around -31°C (-23°F).
JanFebMarAprMayJunJulAugSepOctNovDec182029425464706861493424
Data source: Temperature data for Perth generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Perth

In Perth in January, the precipitation amount is 72 mm (2.8 in) over the course of 9 days.

January Precipitation Trends in Perth

The chart displays monthly precipitation patterns in Perth, 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 Perth, January typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7272751151028510787551268976
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

January Humidity in Perth

In Perth 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 Perth

This chart illustrates the average monthly humidity levels in Perth, 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 Perth is approximately 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%86%82%75%68%69%67%72%83%88%89%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Perth

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

Maximum UV Index Levels in Perth for January

The chart shows the monthly maximum UV Index (UVI) for Perth 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 Perth typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899987532
Data source: Perth 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 Perth Compares to Other Months

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

This table compares monthly weather conditions in Perth, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)72 mm (2.8 inches)93%low
February Weather-7°C (20°F)72 mm (2.8 inches)93%moderate
March Weather-2°C (29°F)75 mm (2.9 inches)86%moderate
April Weather5°C (42°F)115 mm (4.5 inches)82%very high
May Weather12°C (55°F)102 mm (4.0 inches)75%very high
June Weather18°C (64°F)85 mm (3.3 inches)68%very high
July Weather21°C (71°F)107 mm (4.2 inches)69%very high
August Weather20°C (69°F)87 mm (3.4 inches)67%very high
September Weather16°C (61°F)55 mm (2.2 inches)72%high
October Weather10°C (49°F)126 mm (5.0 inches)83%moderate
November Weather1°C (35°F)89 mm (3.5 inches)88%moderate
December Weather-4°C (25°F)76 mm (3.0 inches)89%low

Compare Perth's Climate with Cities Worldwide