| Month | Average (°C) | Record (°C) | Average (cm) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | -0.8 | -8.2 | 18.9 | -28.9 | 7.0 | 33.7 |
| February | 0.2 | -7.8 | 20.7 | -28.0 | 4.3 | 21.1 |
| March | 5.0 | -3.6 | 27.9 | -25.6 | 5.3 | 21.1 |
| April | 11.8 | 1.5 | 31.2 | -11.7 | 7.5 | 5.4 |
| May | 18.7 | 7.4 | 33.3 | -3.3 | 8.3 | 0.0 |
| June | 24.0 | 13.1 | 39.1 | -1.1 | 8.3 | 0.0 |
| July | 26.5 | 15.9 | 37.3 | 4.4 | 8.0 | 0.0 |
| August | 25.7 | 15.3 | 37.9 | 3.3 | 7.1 | 0.0 |
| September | 22.2 | 11.4 | 37.2 | -1.6 | 8.1 | 0.0 |
| October | 15.3 | 5.9 | 32.5 | -8.9 | 7.6 | 0.5 |
| November | 8.0 | 0.5 | 26.7 | -15.0 | 6.7 | 6.2 |
| December | 2.2 | -4.2 | 18.0 | -25.0 | 6.4 | 25.0 |
| Entire year | 13.3 | 4.0 | 39.1 | -28.9 | 85.3 | 113.2 |
|
More Sarnia Weather Records
1882–2024
|
||
|---|---|---|
| Highest daily low | 26.0 °C | August 1, 2006 |
| Lowest daily high | -19.7 °C | January 19, 1994 |
| Greatest daily range (Difference of high and low) |
25.6 °C | February 10, 1951 |
| Greatest difference in daily high over two conscutive days |
23.2 °C | Apr 15–16, 2003 |
| Most daily precipitation | 12.9 cm | July 8, 2015 |
| Most monthly precipitation | 37.6 cm | January 2014 |
| Most yearly precipitation | 135.4 cm | 2013 |
| Most yearly days with precipitation | 215 | 2013 |
| Earliest snow in season | October 2 | 1974 |
| Latest snow in season | May 11 | 1907 |
| Most daily snow | 48.3 cm | December 12, 1960 |
| Most monthly snow | 110.4 cm | December 2000 |
| Most yearly snow | 228.8 cm | 1960 |
| Most snow in a winter | 246.0 cm | 1903–1904 |
| Greatest snow accumulation | 60.0 cm | January 5, 2001 |
| Earliest freeze | September 23 | 1974 |
| Earliest day ≥ 20 °C | February 27 | 2024 |
| Earliest day ≥ 25 °C | March 8 | 2000 |
| Earliest day ≥ 30 °C | April 23 | 1985 |
| Earliest day ≥ 35 °C | June 19 | 1995 |
| Latest freeze | June 11 | 1972 |
| Latest day ≥ 20 °C | November 18 | 2016 |
| Latest day ≥ 25 °C | November 1 | 1950 |
| Latest day ≥ 30 °C | October 8 | 2007 |
| Latest day ≥ 35 °C | September 10 | 2013 |
| Most days in a year < 0 °C | 152 | 2018 |
| Most days in a year ≥ 20 °C | 147 | 2021 |
| Most days in a year ≥ 25 °C | 88 | 2007 |
| Most days in a year ≥ 30 °C | 41 | 1988 |
| Most days in a year ≥ 35 °C | 8 | 1988 |
|
Sarnia Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 37 days | Dec 22, 2013 – Jan 27, 2014 |
| Without precipitation | 92 days | Jul 15 – Oct 14, 2017 |
| With snow | 12 days | Dec 13–24, 1985 |
| Freezing temperatures High temperature ≤ 0 °C |
50 days | Dec 21, 1976 – Feb 8, 1977 |
| High temperature ≥ 20 °C | 94 days | Jun 22 – Sep 23, 2016 |
| High temperature ≥ 25 °C | 21 days | Aug 1–21, 2010 |
| High temperature ≥ 30 °C | 11 days | Aug 25 – Sep 4, 1953 |
| High temperature ≥ 35 °C | 4 days | Jul 6–9, 1988 |