January Weather in Thunder Bay

Last updated: March 2, 2024

The weather in Thunder Bay, Canada, during January is characterized by an average temperature of -13°C (9°F). Highs can soar to 0°C (33°F), while lows may dip to -30°C (-22°F). Typically, the humidity level in Thunder Bay throughout January hovers around 95%.

-30°C (-22°F)

Minimum temperature

-13°C (9°F)

Average temperature

0°C (33°F)

Maximum temperature

95%

Humidity

Precipitation and Sunshine hours

In January, Thunder Bay averages 30 mm (1.2 inches) of rainfall, typically over the course of 6 rainy days. The month enjoys an average of 8 hours 47 minutes of daylight, with the sun shining for approximately 3 hours 43 minutes each day. Additionally, there is a 35% probability of sunny days during this period.

30 mm (1.2 inches)

Precipitation

6 rainy days

Rainy days

3 hours 43 minutes

Sunshine hours

35%

Chance of sun

UV Index

In January, the UV Index in Thunder Bay reaches a maximum of 2, indicating a level of Low exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 45 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 0 0 1 1 1 2 2 2 1 1 1 0 0
Exposure Low
Time to burn 45 min

Compare Thunder Bay's Climate with Cities Worldwide