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Hamilton Weather by Month
Average temperatures, rainfall and humidity for Hamilton, Canada, month by month, built from OpenWeather's historical records. Use it to see what a typical Hamilton month looks like before you travel — then check the live Hamilton forecast for the days ahead.
Warmest month
July
27°C average high
Coolest month
February
-7°C average low
Wettest month
April
70 mm of rain
Driest month
February
23 mm of rain
Average temperature and rainfall in Hamilton by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | -1°C | -7°C | -24°C / 14°C | 41 mm | 81% | 16 km/h |
| February | 0°C | -7°C | -26°C / 17°C | 23 mm | 80% | 16 km/h |
| March | 5°C | -3°C | -21°C / 20°C | 48 mm | 74% | 15 km/h |
| April | 12°C | 3°C | -9°C / 28°C | 70 mm | 72% | 15 km/h |
| May | 19°C | 9°C | -3°C / 31°C | 63 mm | 70% | 13 km/h |
| June | 25°C | 15°C | 4°C / 34°C | 68 mm | 72% | 12 km/h |
| July | 27°C | 18°C | 10°C / 36°C | 53 mm | 74% | 10 km/h |
| August | 26°C | 17°C | 9°C / 35°C | 67 mm | 77% | 10 km/h |
| September | 23°C | 14°C | 3°C / 35°C | 57 mm | 79% | 11 km/h |
| October | 16°C | 8°C | -4°C / 30°C | 69 mm | 81% | 13 km/h |
| November | 8°C | 1°C | -13°C / 24°C | 40 mm | 79% | 14 km/h |
| December | 3°C | -3°C | -22°C / 17°C | 46 mm | 82% | 15 km/h |
Best time to visit Hamilton
The most comfortable time to visit Hamilton is generally June and August to September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around April, totalling about 644 mm a year.
Travellers who prefer heat should aim for July, when highs average 27°C. April is the month to avoid if rain would spoil your plans — it averages 70 mm, roughly 3× the rainfall of February.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Hamilton forecast for what is happening now.