Thunder Bay Weather in July
Average highs run from 22°C on July 1 to 24°C on July 31, and lows from 11°C to 13°C. Normal precipitation for the month is 78 mm over about 16 wet days.
July day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
July at a glance
- Average high
- 23°C
- Average low
- 12°C
- Precipitation
- 78 mm
- Reanalysis high
- 33°CJul 31, 2007
- Reanalysis low
- 4°CJul 7, 1997
- Daylight
- 16 h 02 min to 15 h 04 min
- Cloud cover
- 66%
- Humidity
- 75%
- Dew point
- 12°C
- Wind
- 7.9 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 |
|---|---|---|---|---|---|
| Jul 1 | 22°C | 11°C | 29°C 2002 | 5°C 2001 | 51% |
| Jul 2 | 22°C | 11°C | 32°C 2020 | 6°C 1995 | 50% |
| Jul 3 | 22°C | 11°C | 30°C 2020 | 6°C 2000 | 50% |
| Jul 4 | 22°C | 11°C | 31°C 2020 | 7°C 1994 | 49% |
| Jul 5 | 22°C | 11°C | 29°C 2012 | 6°C 2001 | 49% |
| Jul 6 | 22°C | 11°C | 28°C 1994 | 5°C 1997 | 47% |
| Jul 7 | 22°C | 11°C | 29°C 2002 | 4°C 1997 | 47% |
| Jul 8 | 23°C | 11°C | 30°C 1998 | 7°C 2009 | 49% |
| Jul 9 | 23°C | 12°C | 29°C 2005 | 7°C 2009 | 49% |
| Jul 10 | 23°C | 12°C | 30°C 2005 | 7°C 2003 | 49% |
| Jul 11 | 23°C | 12°C | 29°C 2012 | 7°C 2008 | 48% |
| Jul 12 | 23°C | 12°C | 30°C 1995 | 7°C 1994 | 48% |
| Jul 13 | 23°C | 12°C | 32°C 2006 | 6°C 1994 | 48% |
| Jul 14 | 23°C | 12°C | 32°C 1998 | 8°C 2009 | 48% |
| Jul 15 | 23°C | 12°C | 32°C 2006 | 8°C 2011 | 47% |
| Jul 16 | 23°C | 12°C | 32°C 2006 | 9°C 2009 | 46% |
| Jul 17 | 23°C | 12°C | 31°C 1991 | 8°C 2017 | 44% |
| Jul 18 | 23°C | 12°C | 32°C 2011 | 6°C 2000 | 44% |
| Jul 19 | 24°C | 12°C | 29°C 2011 | 7°C 2000 | 45% |
| Jul 20 | 23°C | 12°C | 29°C 2012 | 6°C 1992 | 45% |
| Jul 21 | 23°C | 12°C | 30°C 2014 | 6°C 1992 | 46% |
| Jul 22 | 24°C | 12°C | 29°C 1999 | 7°C 1997 | 44% |
| Jul 23 | 24°C | 12°C | 30°C 2007 | 8°C 2004 | 42% |
| Jul 24 | 24°C | 12°C | 32°C 2007 | 7°C 2004 | 42% |
| Jul 25 | 24°C | 13°C | 32°C 2007 | 8°C 1991 | 43% |
| Jul 26 | 24°C | 13°C | 31°C 2020 | 7°C 2013 | 42% |
| Jul 27 | 24°C | 13°C | 31°C 2015 | 6°C 2013 | 42% |
| Jul 28 | 24°C | 13°C | 31°C 2006 | 6°C 1996 | 40% |
| Jul 29 | 24°C | 13°C | 31°C 2007 | 8°C 2013 | 39% |
| Jul 30 | 24°C | 13°C | 33°C 2007 | 8°C 2014 | 38% |
| Jul 31 | 24°C | 13°C | 33°C 2007 | 9°C 2014 | 38% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- July 1
- sunrise 6:00 AM, sunset 10:02 PM
- July 31
- sunrise 6:31 AM, sunset 9:35 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.