Sarnia Weather in August
Average highs run from 26°C on August 1 to 25°C on August 31, and lows from 17°C to 16°C. Normal precipitation for the month is 74 mm over about 16 wet days.
August day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
August at a glance
- Average high
- 25°C
- Average low
- 16°C
- Precipitation
- 74 mm
- Reanalysis high
- 35°CAug 8, 2001
- Reanalysis low
- 7°CAug 29, 1992
- Daylight
- 14 h 30 min to 13 h 13 min
- Cloud cover
- 55%
- Humidity
- 76%
- 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 |
|---|---|---|---|---|---|
| Aug 1 | 26°C | 17°C | 34°C 2006 | 11°C 1992 | 49% |
| Aug 2 | 26°C | 17°C | 33°C 2007 | 13°C 1996 | 49% |
| Aug 3 | 26°C | 17°C | 32°C 2005 | 14°C 1993 | 50% |
| Aug 4 | 26°C | 17°C | 30°C 2010 | 12°C 1992 | 50% |
| Aug 5 | 26°C | 17°C | 31°C 2001 | 9°C 1992 | 49% |
| Aug 6 | 26°C | 17°C | 32°C 2001 | 11°C 1994 | 48% |
| Aug 7 | 26°C | 17°C | 33°C 2001 | 11°C 1992 | 49% |
| Aug 8 | 26°C | 17°C | 35°C 2001 | 12°C 1994 | 49% |
| Aug 9 | 25°C | 17°C | 32°C 2005 | 12°C 1994 | 49% |
| Aug 10 | 25°C | 17°C | 30°C 2016 | 12°C 1994 | 48% |
| Aug 11 | 25°C | 17°C | 31°C 2016 | 12°C 1996 | 48% |
| Aug 12 | 25°C | 16°C | 31°C 2016 | 10°C 2004 | 46% |
| Aug 13 | 25°C | 16°C | 30°C 2010 | 12°C 1992 | 46% |
| Aug 14 | 25°C | 16°C | 31°C 1995 | 10°C 1992 | 47% |
| Aug 15 | 25°C | 16°C | 30°C 2010 | 10°C 1994 | 47% |
| Aug 16 | 25°C | 16°C | 30°C 1995 | 11°C 2014 | 47% |
| Aug 17 | 25°C | 16°C | 29°C 2015 | 10°C 1992 | 46% |
| Aug 18 | 25°C | 16°C | 30°C 1995 | 11°C 1992 | 45% |
| Aug 19 | 25°C | 16°C | 30°C 1995 | 10°C 1992 | 46% |
| Aug 20 | 25°C | 16°C | 29°C 2003 | 10°C 1992 | 46% |
| Aug 21 | 25°C | 16°C | 31°C 2003 | 10°C 1992 | 46% |
| Aug 22 | 25°C | 16°C | 30°C 2008 | 11°C 1992 | 46% |
| Aug 23 | 25°C | 16°C | 31°C 1998 | 12°C 1997 | 44% |
| Aug 24 | 25°C | 16°C | 31°C 1998 | 13°C 2005 | 42% |
| Aug 25 | 25°C | 16°C | 29°C 2012 | 12°C 2015 | 42% |
| Aug 26 | 25°C | 16°C | 30°C 2003 | 11°C 2008 | 41% |
| Aug 27 | 25°C | 16°C | 29°C 2020 | 13°C 2015 | 42% |
| Aug 28 | 25°C | 16°C | 31°C 1991 | 10°C 1992 | 40% |
| Aug 29 | 25°C | 16°C | 31°C 2010 | 7°C 1992 | 39% |
| Aug 30 | 25°C | 16°C | 32°C 2010 | 11°C 1999 | 40% |
| Aug 31 | 25°C | 16°C | 31°C 2010 | 11°C 1992 | 41% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- August 1
- sunrise 6:21 AM, sunset 8:51 PM
- August 31
- sunrise 6:53 AM, sunset 8:06 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.