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Hamilton (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hamilton.
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Climate overview of Hamilton
The climate in Hamilton, Ontario, Canada, is marked by large temperature swings across the seasons, ranging from 27°C (81°F) in July to 1°C (34°F) in January.
Hamilton sees a moderate amount of rain/snowfall, totalling around 978 mm (39 in) per year. It experiences warm summers and very cold winters, creating some seasonal variation. July is the sunniest month, averaging 10.2 hours of sunshine per day.
Hamilton Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hamilton - and find the best time to visit.
Monthly Temperature in Hamilton
In Hamilton, temperatures differ significantly between summer and winter months. Average maximum daytime temperatures range from a comfortable 27°C (81°F) in July, the warmest time of the year, to a very cold 1°C (34°F) during cooler months like January.
At night, you can expect temperatures ranging from 17°C (63°F) in July to around -8°C (18°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hamilton
On average, Hamilton receives a reasonable amount of rain/snowfall, with an annual precipitation of 978 mm (39 in). Year-round, Hamilton has a balanced climate with minimal variation in precipitation. The difference between the wettest month, April, with 98 mm (3.9 in), and the driest month, February, with 66 mm (2.6 in), is minimal. For more details, please visit our Hamilton Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Hamilton
Seasonal changes in sunshine hours are quite dramatic in Hamilton. While July receives considerable daily sunshine with up to 10.2 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.4 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Best Time to Visit Hamilton
Conditions in Hamilton are generally most comfortable in June, July, August and September. They are typically least comfortable in January, February, March, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
cold
Mar
cold
Apr
mixed
May
very good
Jun
excellent
Jul
excellent
Aug
excellent
Sep
excellent
Oct
good
Nov
cold
Dec
cold
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -8°C (18°F).
Frequently asked questions about the climate in Hamilton
What is the best time to visit Hamilton?
June, July, August and September typically offer the most optimal weather in Hamilton. In contrast, January, February, March, November and December tend to have less optimal conditions. Hamilton has warm summers and very cold winters.
What temperatures can I expect in Hamilton?
Daytime highs range from 1°C (34°F) in January to 27°C (81°F) in July. Nighttime lows range from -8°C (18°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Hamilton get?
Annual rainfall is around 978 mm (39 in). April is the wettest month with 98 mm (3.9 in), while February is the driest with 66 mm (2.6 in).
How sunny is Hamilton?
Hamilton receives around 2,120 hours of sunshine per year. July is the sunniest month with 305 hours, while December is the cloudiest with just 72 hours. Overall, Hamilton enjoys abundant sunshine.
Hamilton 3-Day Forecast
Hamilton on the map
Hamilton is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
Toronto
22°C (72°F) Niagara Falls23°C (73°F) Montréal
22°C (72°F) Ottawa22°C (72°F) Quebec City
20°C (68°F) Vancouver19°C (66°F) Calgary19°C (66°F) Whistler15°C (59°F) Bucket list
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