Hamilton weather by month

Check out Hamilton weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Hamilton (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
28°F maximum daytime temperature in January in Hamilton28
30°F maximum daytime temperature in February in Hamilton30
39°F maximum daytime temperature in March in Hamilton39
54°F maximum daytime temperature in April in Hamilton54
66°F maximum daytime temperature in May in Hamilton66
75°F maximum daytime temperature in June in Hamilton75
81°F maximum daytime temperature in July in Hamilton81
79°F maximum daytime temperature in August in Hamilton79
70°F maximum daytime temperature in September in Hamilton70
57°F maximum daytime temperature in October in Hamilton57
46°F maximum daytime temperature in November in Hamilton46
34°F maximum daytime temperature in December in Hamilton34
Min temperature (night-time)
16°F minimum night-time temperature in January in Hamilton16
16°F minimum night-time temperature in February in Hamilton16
25°F minimum night-time temperature in March in Hamilton25
36°F minimum night-time temperature in April in Hamilton36
46°F minimum night-time temperature in May in Hamilton46
55°F minimum night-time temperature in June in Hamilton55
61°F minimum night-time temperature in July in Hamilton61
59°F minimum night-time temperature in August in Hamilton59
52°F minimum night-time temperature in September in Hamilton52
41°F minimum night-time temperature in October in Hamilton41
34°F minimum night-time temperature in November in Hamilton34
21°F minimum night-time temperature in December in Hamilton21
Heat & Humidity
No heat & humidity in January in Hamilton0
No heat & humidity in February in Hamilton0
No heat & humidity in March in Hamilton0
No heat & humidity in April in Hamilton0
No heat & humidity in May in Hamilton0
No heat & humidity in June in Hamilton0
Moderate heat & humidity in July in HamiltonM
Low heat & humidity in August in HamiltonL
No heat & humidity in September in Hamilton0
No heat & humidity in October in Hamilton0
No heat & humidity in November in Hamilton0
No heat & humidity in December in Hamilton0
Sea temperature
37°F sea temperature in January in Hamilton37
36°F sea temperature in February in Hamilton36
36°F sea temperature in March in Hamilton36
37°F sea temperature in April in Hamilton37
45°F sea temperature in May in Hamilton45
55°F sea temperature in June in Hamilton55
66°F sea temperature in July in Hamilton66
70°F sea temperature in August in Hamilton70
66°F sea temperature in September in Hamilton66
57°F sea temperature in October in Hamilton57
48°F sea temperature in November in Hamilton48
41°F sea temperature in December in Hamilton41

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Hamilton

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Hamilton9
11 hours of daylight per day in February in Hamilton11
12 hours of daylight per day in March in Hamilton12
13 hours of daylight per day in April in Hamilton13
15 hours of daylight per day in May in Hamilton15
15 hours of daylight per day in June in Hamilton15
15 hours of daylight per day in July in Hamilton15
14 hours of daylight per day in August in Hamilton14
12 hours of daylight per day in September in Hamilton12
11 hours of daylight per day in October in Hamilton11
10 hours of daylight per day in November in Hamilton10
9 hours of daylight per day in December in Hamilton9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Hamilton1
UV (maximum) index 2 (Low) in February in Hamilton2
UV (maximum) index 4 (Moderate) in March in Hamilton4
UV (maximum) index 5 (Moderate) in April in Hamilton5
UV (maximum) index 7 (High) in May in Hamilton7
UV (maximum) index 8 (Very High) in June in Hamilton8
UV (maximum) index 8 (Very High) in July in Hamilton8
UV (maximum) index 7 (High) in August in Hamilton7
UV (maximum) index 6 (High) in September in Hamilton6
UV (maximum) index 3 (Moderate) in October in Hamilton3
UV (maximum) index 2 (Low) in November in Hamilton2
UV (maximum) index 1 (Low) in December in Hamilton1

Rainfall in Hamilton

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
12 days with some rainfall in January in Hamilton12
10 days with some rainfall in February in Hamilton10
12 days with some rainfall in March in Hamilton12
11 days with some rainfall in April in Hamilton11
11 days with some rainfall in May in Hamilton11
10 days with some rainfall in June in Hamilton10
9 days with some rainfall in July in Hamilton9
9 days with some rainfall in August in Hamilton9
10 days with some rainfall in September in Hamilton10
11 days with some rainfall in October in Hamilton11
13 days with some rainfall in November in Hamilton13
14 days with some rainfall in December in Hamilton14
Average monthly rainfall (inches)
2.4 inches monthly rainfall in January in Hamilton2.4
2.2 inches monthly rainfall in February in Hamilton2.2
2.7 inches monthly rainfall in March in Hamilton2.7
2.9 inches monthly rainfall in April in Hamilton2.9
2.9 inches monthly rainfall in May in Hamilton2.9
3.0 inches monthly rainfall in June in Hamilton3.0
2.9 inches monthly rainfall in July in Hamilton2.9
3.6 inches monthly rainfall in August in Hamilton3.6
3.3 inches monthly rainfall in September in Hamilton3.3
2.8 inches monthly rainfall in October in Hamilton2.8
3.1 inches monthly rainfall in November in Hamilton3.1
3.2 inches monthly rainfall in December in Hamilton3.2

More about Hamilton

Hamilton by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ontario

Travelbag: Latest holiday sale offers worldwide

  • Explore latest sale offers on holidays in 2025/2026
  • Filter deals by continent, star rating & holiday type
  • Including Dubai, Caribbean, North America, Asia & Pacific
Go to Travelbag deal >>

View all Travelbag offers

TravelbagHoliday deal finder

The climate guide for Ontario (Hamilton) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Hamilton?

Hamilton has a cold climate with hot summers and some rainfall in all months.

Metric (°C)  |  Imperial (°F)

Back to top

More about Canada

Compare Hamilton with the UK

Below the Hamilton chart shows average maximum daytime temperature for Hamilton, Ontario, Canada and the UK (London).

Maximum daytime temperature (°F)

Hamilton, Ontario, Canada
UK (London)
45
45
39
50
54
55
66
63
75
68
81
72
79
72
70
66
57
59
46
50
34
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
28
30

Metric (°C)  |  Imperial (°F)

Compare more Hamilton weather >>

Back to top

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^