Sarnia Weather in July
Average highs run from 25°C on July 1 to 26°C on July 31, and lows from 16°C to 17°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
- 26°C
- Average low
- 17°C
- Precipitation
- 78 mm
- Reanalysis high
- 33°CJul 17, 2012
- Reanalysis low
- 9°CJul 2, 2001
- Daylight
- 15 h 18 min to 14 h 32 min
- Cloud cover
- 55%
- Humidity
- 75%
- Dew point
- 16°C
- Wind
- 14.0 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 | 25°C | 16°C | 31°C 2002 | 11°C 2001 | 48% |
| Jul 2 | 25°C | 16°C | 31°C 2002 | 9°C 2001 | 48% |
| Jul 3 | 25°C | 16°C | 31°C 2002 | 9°C 2015 | 48% |
| Jul 4 | 25°C | 16°C | 32°C 2018 | 10°C 1996 | 48% |
| Jul 5 | 25°C | 16°C | 32°C 2010 | 11°C 1997 | 46% |
| Jul 6 | 25°C | 16°C | 31°C 2012 | 9°C 2001 | 44% |
| Jul 7 | 25°C | 16°C | 32°C 2010 | 11°C 1997 | 44% |
| Jul 8 | 26°C | 16°C | 31°C 2010 | 10°C 1995 | 45% |
| Jul 9 | 26°C | 16°C | 32°C 2007 | 12°C 1997 | 46% |
| Jul 10 | 26°C | 16°C | 29°C 2005 | 9°C 1996 | 47% |
| Jul 11 | 26°C | 17°C | 31°C 2005 | 11°C 1994 | 48% |
| Jul 12 | 26°C | 17°C | 32°C 2005 | 11°C 2002 | 48% |
| Jul 13 | 26°C | 17°C | 32°C 2005 | 11°C 2001 | 48% |
| Jul 14 | 26°C | 17°C | 31°C 1995 | 12°C 2001 | 48% |
| Jul 15 | 26°C | 17°C | 32°C 2005 | 12°C 2015 | 49% |
| Jul 16 | 26°C | 17°C | 32°C 2006 | 11°C 2015 | 50% |
| Jul 17 | 26°C | 17°C | 33°C 2012 | 12°C 2014 | 50% |
| Jul 18 | 26°C | 17°C | 30°C 2005 | 13°C 2014 | 50% |
| Jul 19 | 26°C | 17°C | 30°C 1991 | 12°C 2009 | 50% |
| Jul 20 | 26°C | 17°C | 31°C 2019 | 11°C 1996 | 51% |
| Jul 21 | 26°C | 17°C | 32°C 2011 | 10°C 1992 | 53% |
| Jul 22 | 26°C | 17°C | 31°C 2016 | 9°C 1992 | 54% |
| Jul 23 | 26°C | 17°C | 31°C 2012 | 12°C 1992 | 53% |
| Jul 24 | 26°C | 17°C | 32°C 2005 | 12°C 1992 | 54% |
| Jul 25 | 26°C | 17°C | 30°C 2005 | 12°C 2013 | 52% |
| Jul 26 | 26°C | 17°C | 30°C 2020 | 12°C 1994 | 53% |
| Jul 27 | 26°C | 17°C | 30°C 2016 | 12°C 1991 | 53% |
| Jul 28 | 26°C | 17°C | 30°C 2015 | 11°C 2013 | 53% |
| Jul 29 | 26°C | 17°C | 31°C 2006 | 11°C 2014 | 53% |
| Jul 30 | 26°C | 17°C | 31°C 1999 | 11°C 1992 | 51% |
| Jul 31 | 26°C | 17°C | 32°C 1999 | 11°C 1992 | 50% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- July 1
- sunrise 5:54 AM, sunset 9:12 PM
- July 31
- sunrise 6:20 AM, sunset 8:52 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.