Hamilton weather by month

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

Temperature
Rainfall
Sunshine & UV index

Temperature in Hamilton (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	-2	-1	4	12	19	24	27	26	21	14	8	1
Min temperature (night-time)	-9	-9	-4	2	8	13	16	15	11	5	1	-6
Heat & Humidity	0	0	0	0	0	0	M	L	0	0	0	0
Sea temperature	3	2	2	3	7	13	19	21	19	14	9	5

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

Sunshine & UV index in Hamilton

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	3	4	5	6	8	9	9	8	6	5	3	2
Daily hours of daylight	9	11	12	13	15	15	15	14	12	11	10	9
UV Index (Maximum)	1	2	4	5	7	8	8	7	6	3	2	1

Rainfall in Hamilton

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	12	10	12	11	11	10	9	9	10	11	13	14
Average monthly rainfall (mm)	61	55	69	73	73	77	74	91	84	70	79	81

More about Hamilton

Hamilton by month

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

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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.

Hamilton weather in January

Expect daytime maximum temperatures of -2°C in Hamilton, Ontario in January based on long-term weather averages. There are 3 hours of sunshine per day on average with 12 days with some rainfall and typically 61 mm of rainfall in the month, which might fall as snow.

-2
-2°C max day temperature
3
3 hours of sunshine per day
12
12 days with some rainfall
-9
-9°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
61
61 mm of monthly rainfall
1
1 (Low) UV index
3
3°C sea temperature

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Hamilton weather in February

Expect daytime maximum temperatures of -1°C in Hamilton, Ontario in February based on long-term weather averages. There are 4 hours of sunshine per day on average with 10 days with some rainfall and typically 55 mm of rainfall in the month, which might fall as snow.

-1
-1°C max day temperature
4
4 hours of sunshine per day
10
10 days with some rainfall
-9
-9°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
55
55 mm of monthly rainfall
2
2 (Low) UV index
2
2°C sea temperature

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Hamilton weather in March

Expect daytime maximum temperatures of 4°C in Hamilton, Ontario in March based on long-term weather averages. There are 5 hours of sunshine per day on average with 12 days with some rainfall and typically 69 mm of rainfall in the month, which might fall as snow.

4
4°C max day temperature
5
5 hours of sunshine per day
12
12 days with some rainfall
-4
-4°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
69
69 mm of monthly rainfall
4
4 (Moderate) UV index
2
2°C sea temperature

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Hamilton weather in April

Expect daytime maximum temperatures of 12°C in Hamilton, Ontario in April based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 73 mm of rainfall in the month.

12
12°C max day temperature
6
6 hours of sunshine per day
11
11 days with some rainfall
2
2°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
73
73 mm of monthly rainfall
5
5 (Moderate) UV index
3
3°C sea temperature

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Hamilton weather in May

Expect daytime maximum temperatures of 19°C in Hamilton, Ontario in May based on long-term weather averages. There are 8 hours of sunshine per day on average with 11 days with some rainfall and typically 73 mm of rainfall in the month.

19
19°C max day temperature
8
8 hours of sunshine per day
11
11 days with some rainfall
8
8°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
73
73 mm of monthly rainfall
7
7 (High) UV index
7
7°C sea temperature

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Hamilton weather in June

Expect daytime maximum temperatures of 24°C in Hamilton, Ontario in June based on long-term weather averages. There are 9 hours of sunshine per day on average with 10 days with some rainfall and typically 77 mm of rainfall in the month.

24
24°C max day temperature
9
9 hours of sunshine per day
10
10 days with some rainfall
13
13°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
77
77 mm of monthly rainfall
8
8 (Very High) UV index
13
13°C sea temperature

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Hamilton weather in July

Expect daytime maximum temperatures of 27°C in Hamilton, Ontario in July based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 74 mm of rainfall in the month.

27
27°C max day temperature
9
9 hours of sunshine per day
9
9 days with some rainfall
16
16°C min night temperature
15
15 hours of daylight per day
M
Moderate heat & humidity
74
74 mm of monthly rainfall
8
8 (Very High) UV index
19
19°C sea temperature

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Hamilton weather in August

Expect daytime maximum temperatures of 26°C in Hamilton, Ontario in August based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 91 mm of rainfall in the month.

26
26°C max day temperature
8
8 hours of sunshine per day
9
9 days with some rainfall
15
15°C min night temperature
14
14 hours of daylight per day
L
Low heat & humidity
91
91 mm of monthly rainfall
7
7 (High) UV index
21
21°C sea temperature

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Hamilton weather in September

Expect daytime maximum temperatures of 21°C in Hamilton, Ontario in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 10 days with some rainfall and typically 84 mm of rainfall in the month.

21
21°C max day temperature
6
6 hours of sunshine per day
10
10 days with some rainfall
11
11°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
84
84 mm of monthly rainfall
6
6 (High) UV index
19
19°C sea temperature

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Hamilton weather in October

Expect daytime maximum temperatures of 14°C in Hamilton, Ontario in October based on long-term weather averages. There are 5 hours of sunshine per day on average with 11 days with some rainfall and typically 70 mm of rainfall in the month.

14
14°C max day temperature
5
5 hours of sunshine per day
11
11 days with some rainfall
5
5°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
70
70 mm of monthly rainfall
3
3 (Moderate) UV index
14
14°C sea temperature

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Hamilton weather in November

Expect daytime maximum temperatures of 8°C in Hamilton, Ontario in November based on long-term weather averages. There are 3 hours of sunshine per day on average with 13 days with some rainfall and typically 79 mm of rainfall in the month.

8
8°C max day temperature
3
3 hours of sunshine per day
13
13 days with some rainfall
1
1°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
79
79 mm of monthly rainfall
2
2 (Low) UV index
9
9°C sea temperature

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Hamilton weather in December

Expect daytime maximum temperatures of 1°C in Hamilton, Ontario in December based on long-term weather averages. There are 2 hours of sunshine per day on average with 14 days with some rainfall and typically 81 mm of rainfall in the month, which might fall as snow.

1
1°C max day temperature
2
2 hours of sunshine per day
14
14 days with some rainfall
-6
-6°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
81
81 mm of monthly rainfall
1
1 (Low) UV index
5
5°C sea temperature

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