Sarnia Weather in October
Average highs run from 19°C on October 1 to 11°C on October 31, and lows from 9°C to 4°C. Normal precipitation for the month is 68 mm over about 12 wet days.
October day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
October at a glance
- Average high
- 15°C
- Average low
- 6°C
- Precipitation
- 68 mm
- Reanalysis high
- 30°COct 8, 2007
- Reanalysis low
- -3°COct 28, 1997
- Daylight
- 11 h 44 min to 10 h 20 min
- Cloud cover
- 67%
- Humidity
- 77%
- Dew point
- 6°C
- Wind
- 19.1 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 |
|---|---|---|---|---|---|
| Oct 1 | 19°C | 9°C | 28°C 2002 | 1°C 2003 | 44% |
| Oct 2 | 19°C | 9°C | 26°C 2005 | 1°C 2003 | 44% |
| Oct 3 | 18°C | 9°C | 26°C 2005 | 0°C 1993 | 44% |
| Oct 4 | 18°C | 9°C | 28°C 2005 | 3°C 1996 | 43% |
| Oct 5 | 18°C | 9°C | 29°C 2007 | 0°C 2003 | 42% |
| Oct 6 | 18°C | 8°C | 29°C 2007 | 3°C 1999 | 42% |
| Oct 7 | 18°C | 8°C | 30°C 2007 | 0°C 2001 | 41% |
| Oct 8 | 17°C | 8°C | 30°C 2007 | 0°C 2001 | 40% |
| Oct 9 | 17°C | 8°C | 27°C 2018 | 1°C 1993 | 40% |
| Oct 10 | 17°C | 8°C | 25°C 2018 | -2°C 1993 | 40% |
| Oct 11 | 17°C | 7°C | 23°C 2011 | 0°C 2009 | 39% |
| Oct 12 | 16°C | 7°C | 25°C 2008 | 1°C 2006 | 38% |
| Oct 13 | 16°C | 7°C | 24°C 1997 | -2°C 1993 | 39% |
| Oct 14 | 16°C | 7°C | 22°C 2005 | 0°C 1993 | 38% |
| Oct 15 | 16°C | 7°C | 21°C 2016 | -1°C 2006 | 38% |
| Oct 16 | 15°C | 6°C | 23°C 1999 | -2°C 1991 | 39% |
| Oct 17 | 15°C | 6°C | 24°C 2016 | 0°C 1992 | 41% |
| Oct 18 | 15°C | 6°C | 25°C 2016 | -1°C 2018 | 41% |
| Oct 19 | 14°C | 6°C | 21°C 2016 | -2°C 1992 | 43% |
| Oct 20 | 14°C | 6°C | 21°C 2000 | -1°C 1991 | 44% |
| Oct 21 | 14°C | 5°C | 24°C 2007 | 0°C 2002 | 43% |
| Oct 22 | 13°C | 5°C | 23°C 2007 | 0°C 1997 | 43% |
| Oct 23 | 13°C | 5°C | 23°C 2020 | -1°C 1997 | 43% |
| Oct 24 | 13°C | 5°C | 22°C 2012 | 0°C 2002 | 44% |
| Oct 25 | 13°C | 5°C | 22°C 2012 | 0°C 2002 | 44% |
| Oct 26 | 13°C | 5°C | 20°C 2000 | 2°C 1994 | 45% |
| Oct 27 | 12°C | 4°C | 21°C 2000 | -1°C 1997 | 44% |
| Oct 28 | 12°C | 4°C | 19°C 1999 | -3°C 1997 | 44% |
| Oct 29 | 12°C | 4°C | 19°C 2016 | -1°C 1993 | 43% |
| Oct 30 | 12°C | 4°C | 22°C 2004 | -2°C 1993 | 43% |
| Oct 31 | 11°C | 4°C | 20°C 2003 | -2°C 1996 | 41% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- October 1
- sunrise 7:27 AM, sunset 7:11 PM
- October 31
- sunrise 8:03 AM, sunset 6:23 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.