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Hamilton Weather, Climate and Best Time to Visit
Data source：Meteostat
Update date：2025-09
Hamilton year round climate
- Spring (March–May): Average 2.4–14.1°C, climate transitioning from cold to warm, moderate rainfall. Common activities: Late maple leaf viewing, outdoor walks. Suggested clothing: Warm jacket, sweater, long pants.
- Summer (June–August): Average 18.8–21.7°C, warm and humid climate, most rainfall in July. Common activities: Outdoor picnics, hiking, water activities. Suggested clothing: Light and breathable clothing, rain gear.
- Autumn (September–November): Average 17.7–5.6°C, climate transitioning from mild to cool, decreased rainfall. Common activities: Maple leaf viewing, fruit picking. Suggested clothing: Jacket, comfortable long pants.
- Winter (December–February): Average -3.0–1.2°C, cold climate, low probability of snowfall, moderate rainfall. Common activities: Indoor activities, skiing (requires travel to other areas). Suggested clothing: Heavy coat, warm clothing, hat, gloves, scarf.
Hamilton climatological average
Annual average temperature: approx. 9.8°C / Annual rainfall: approx. 852 mm / Summer humidity: 65%–75% / Rainiest month: July
Hamilton monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
-3°C
75.2
February
-1°C
67.5
March
2.4°C
77.3
April
7.9°C
78
May
14.1°C
57
June
18.8°C
79.3
July
21.7°C
131.8
August
20.7°C
86.8
September
17.7°C
36.3
October
11.1°C
43.6
November
5.6°C
44.1
December
1.2°C
75.5
Hamilton weather for the next seven days
1/19
Monday
Light freezing rain
-4.8°C/-10.6°C
1/20
Tuesday
Partly Cloudy
-9°C/-13.2°C
1/21
Wednesday
Blowing snow
0°C/-11.3°C
1/22
Thursday
Light freezing rain
-2.6°C/-13.1°C
1/23
Friday
Moderate snow
2.5°C/-16°C
1/24
Saturday
Patchy moderate snow
0.5°C/-18.1°C
1/25
Sunday
Heavy snow
-9.8°C/-22°C
