Thunder Bay Weather in January
Average highs run from -9°C on January 1 to -10°C on January 31, and lows from -18°C to -19°C. Normal precipitation for the month is 25 mm over about 6 wet days.
January day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
January at a glance
- Average high
- -10°C
- Average low
- -19°C
- Precipitation
- 25 mm
- Reanalysis high
- 3°CJan 10, 2013
- Reanalysis low
- -38°CJan 18, 1994
- Daylight
- 8 h 25 min to 9 h 28 min
- Cloud cover
- 68%
- Humidity
- 98%
- Dew point
- -15°C
- Wind
- 12.2 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| Jan 1 | -9°C | -18°C | 0°C 1992 | -38°C 2014 | 24% |
| Jan 2 | -9°C | -18°C | 0°C 1992 | -35°C 2014 | 24% |
| Jan 3 | -9°C | -18°C | 0°C 2007 | -33°C 2014 | 24% |
| Jan 4 | -9°C | -18°C | 1°C 2007 | -31°C 2018 | 25% |
| Jan 5 | -9°C | -18°C | 1°C 2007 | -33°C 2018 | 25% |
| Jan 6 | -10°C | -18°C | 1°C 2012 | -37°C 2014 | 24% |
| Jan 7 | -10°C | -18°C | 1°C 2003 | -32°C 1991 | 23% |
| Jan 8 | -10°C | -18°C | 2°C 2003 | -30°C 2014 | 22% |
| Jan 9 | -10°C | -18°C | 1°C 2002 | -32°C 1993 | 22% |
| Jan 10 | -10°C | -18°C | 3°C 2013 | -33°C 1991 | 23% |
| Jan 11 | -10°C | -18°C | 2°C 2013 | -30°C 1999 | 23% |
| Jan 12 | -10°C | -19°C | 1°C 2013 | -30°C 1999 | 22% |
| Jan 13 | -10°C | -19°C | -2°C 1996 | -31°C 1994 | 22% |
| Jan 14 | -10°C | -19°C | -2°C 2010 | -35°C 1994 | 24% |
| Jan 15 | -10°C | -19°C | -2°C 2010 | -35°C 1994 | 25% |
| Jan 16 | -10°C | -19°C | 0°C 2010 | -32°C 1994 | 25% |
| Jan 17 | -10°C | -19°C | 0°C 2010 | -35°C 2005 | 26% |
| Jan 18 | -10°C | -19°C | 0°C 2017 | -38°C 1994 | 25% |
| Jan 19 | -10°C | -20°C | 1°C 2017 | -32°C 2019 | 24% |
| Jan 20 | -10°C | -19°C | 1°C 2017 | -34°C 2019 | 23% |
| Jan 21 | -10°C | -19°C | 1°C 2017 | -34°C 2014 | 24% |
| Jan 22 | -10°C | -19°C | 1°C 2010 | -34°C 2013 | 24% |
| Jan 23 | -10°C | -19°C | 1°C 2017 | -32°C 1997 | 23% |
| Jan 24 | -10°C | -19°C | 1°C 2017 | -34°C 2013 | 22% |
| Jan 25 | -10°C | -19°C | -1°C 2017 | -33°C 1996 | 22% |
| Jan 26 | -10°C | -19°C | 0°C 2006 | -32°C 2019 | 22% |
| Jan 27 | -10°C | -19°C | 1°C 2006 | -37°C 2019 | 23% |
| Jan 28 | -10°C | -19°C | 0°C 2008 | -33°C 2019 | 23% |
| Jan 29 | -10°C | -19°C | 1°C 2013 | -33°C 1991 | 21% |
| Jan 30 | -10°C | -19°C | 1°C 2016 | -32°C 1996 | 20% |
| Jan 31 | -10°C | -19°C | 1°C 1995 | -36°C 1996 | 19% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EST).
- January 1
- sunrise 8:48 AM, sunset 5:13 PM
- January 31
- sunrise 8:27 AM, sunset 5:55 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.