| Month | Average (°C) | Record (°C) | Average (cm) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | -3.1 | -11.0 | 16.7 | -38.3 | 8.4 | 49.7 |
| February | -1.5 | -10.3 | 15.5 | -38.3 | 6.3 | 41.4 |
| March | 3.7 | -4.9 | 26.0 | -31.7 | 6.8 | 28.1 |
| April | 11.3 | 1.8 | 30.6 | -15.0 | 8.9 | 7.6 |
| May | 18.8 | 8.3 | 32.2 | -6.7 | 8.3 | 0.2 |
| June | 23.4 | 13.5 | 39.4 | 0.0 | 9.5 | 0.0 |
| July | 26.1 | 16.5 | 39.4 | 2.0 | 9.5 | 0.0 |
| August | 25.4 | 15.7 | 36.7 | 1.7 | 8.1 | 0.0 |
| September | 21.2 | 11.7 | 34.4 | -3.9 | 9.3 | 0.0 |
| October | 13.8 | 5.7 | 27.8 | -11.1 | 10.1 | 1.2 |
| November | 7.0 | -0.1 | 23.9 | -26.1 | 8.1 | 11.1 |
| December | 0.5 | -6.5 | 19.5 | -36.1 | 8.4 | 39.4 |
| Entire year | 12.3 | 3.4 | 39.4 | -38.3 | 101.3 | 178.6 |
|
More Brockville Weather Records
1871–2023
|
||
|---|---|---|
| Highest daily low | 28.3 °C | July 6, 1921 |
| Lowest daily high | -30.0 °C | January 3, 1981 |
| Greatest daily range (Difference of high and low) |
31.7 °C | January 25, 1976 |
| Greatest difference in daily high over two conscutive days |
27.0 °C | Jan 12–13, 2018 |
| Most daily precipitation | 9.0 cm | July 9, 1989 |
| Most monthly precipitation | 24.5 cm | August 1959 |
| Most yearly precipitation | 131.3 cm | 2017 |
| Most yearly days with precipitation | 183 | 1954 |
| Earliest snow in season | September 25 | 1939 |
| Latest snow in season | May 19 | 1976 |
| Most daily snow | 47.5 cm | February 16, 1954 |
| Most monthly snow | 138.8 cm | December 1977 |
| Most yearly snow | 419.0 cm | 1876 |
| Most snow in a winter | 418.1 cm | 1878–1879 |
| Greatest snow accumulation | 68.0 cm | January 31, 1985 |
| Earliest freeze | September 14 | 1963 |
| Earliest day ≥ 25 °C | March 28 | 1945 |
| Earliest day ≥ 30 °C | April 27 | 1921 |
| Earliest day ≥ 35 °C | June 3 | 1919 |
| Latest freeze | May 25 | 1963 |
| Latest day ≥ 25 °C | October 27 | 1984 |
| Latest day ≥ 30 °C | September 28 | 1959 |
| Latest day ≥ 35 °C | August 22 | 1916 |
| Most days in a year < 0 °C | 182 | 1875 |
| Most days in a year ≥ 20 °C | 156 | 1921 |
| Most days in a year ≥ 25 °C | 107 | 1959 |
| Most days in a year ≥ 30 °C | 46 | 1921 |
| Most days in a year ≥ 35 °C | 8 | 1921 |
|
Brockville Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 14 days | Sep 26 – Oct 9, 2009 |
| Without precipitation | 47 days | Nov 20, 1885 – Jan 5, 1886 |
| With snow | 11 days | Jan 29 – Feb 8, 2015 |
| Freezing temperatures High temperature ≤ 0 °C |
47 days | Dec 26, 1917 – Feb 10, 1918 |
| High temperature ≥ 20 °C | 110 days | May 25 – Sep 11, 1960 |
| High temperature ≥ 25 °C | 52 days | Jun 17 – Aug 7, 1921 |
| High temperature ≥ 30 °C | 18 days | Jun 27 – Jul 14, 1921 |
| High temperature ≥ 35 °C | 4 days | Aug 19–22, 1916 |