| Month | Average (°C) | Record (°C) | Average (cm) | ||
|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | |
| January | -0.4 | -8.2 | 18.3 | -30.6 | 5.9 |
| February | 0.7 | -7.9 | 18.8 | -29.4 | 5.0 |
| March | 5.4 | -3.8 | 27.2 | -27.2 | 6.5 |
| April | 12.1 | 1.9 | 31.1 | -14.4 | 8.1 |
| May | 19.0 | 7.6 | 36.1 | -7.2 | 7.7 |
| June | 24.5 | 13.1 | 38.9 | 0.0 | 7.5 |
| July | 27.3 | 15.7 | 41.1 | 1.1 | 8.3 |
| August | 26.5 | 15.2 | 38.9 | 1.7 | 5.6 |
| September | 22.5 | 11.2 | 37.8 | -3.9 | 6.6 |
| October | 15.3 | 5.5 | 32.2 | -11.1 | 7.5 |
| November | 8.8 | 0.6 | 26.1 | -22.8 | 6.3 |
| December | 2.8 | -4.0 | 21.2 | -27.8 | 5.7 |
| Entire year | 13.8 | 3.9 | 41.1 | -30.6 | 79.3 |
|
More Hamilton Weather Records
1866–2024
|
||
|---|---|---|
| Highest daily low | 26.7 °C | June 29, 1947 |
| Lowest daily high | -20.6 °C | January 13, 1914 |
| Greatest daily range (Difference of high and low) |
31.2 °C | May 30, 1871 |
| Greatest difference in daily high over two conscutive days |
24.6 °C | Mar 9–10, 2000 |
| Most daily precipitation | 11.7 cm | January 2, 1870 |
| Most monthly precipitation | 28.7 cm | January 1870 |
| Most yearly precipitation | 125.2 cm | 1870 |
| Most yearly days with precipitation | 194 | 2021 |
| Earliest freeze | September 10 | 1883 |
| Earliest day ≥ 20 °C | March 7 | 2000 |
| Earliest day ≥ 25 °C | March 8 | 2000 |
| Earliest day ≥ 30 °C | April 22 | 1985 |
| Earliest day ≥ 35 °C | May 18 | 1962 |
| Latest freeze | May 25 | 1956 |
| Latest day ≥ 20 °C | December 3 | 1982 |
| Latest day ≥ 25 °C | November 10 | 2020 |
| Latest day ≥ 30 °C | October 8 | 2007 |
| Latest day ≥ 35 °C | September 16 | 1939 |
| Most days in a year < 0 °C | 177 | 1885 |
| Most days in a year ≥ 20 °C | 150 | 1881 |
| Most days in a year ≥ 25 °C | 110 | 1881 |
| Most days in a year ≥ 30 °C | 45 | 1881 |
| Most days in a year ≥ 35 °C | 11 | 1988 |
| Most days in a year ≥ 40 °C | 3 | 1868 |
|
Hamilton Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 17 days | Feb 3–19, 2021 |
| Without precipitation | 39 days | Aug 20 – Sep 27, 1908 |
| Freezing temperatures High temperature ≤ 0 °C |
42 days | Jan 26 – Mar 8, 1978 |
| High temperature ≥ 20 °C | 105 days | Jun 5 – Sep 17, 2012 |
| High temperature ≥ 25 °C | 41 days | Jun 20 – Jul 30, 1921 |
| High temperature ≥ 30 °C | 12 days | Aug 24 – Sep 4, 1953 |
| High temperature ≥ 35 °C | 6 days | Jul 2–7, 1921 |