What is the hottest month in Hamilton?

July — average highs around 82° with lows near 64°.

What is the coldest month in Hamilton?

February, when nights typically drop to 20° and days top out near 35°.

What is the rainiest month in Hamilton?

April, averaging about 3.9 in of precipitation; the driest is November at roughly 2.3 in.

How warm is Hamilton over the year?

The annual mean is 50°, with about 36 in of precipitation in a typical year (1991-2020 normals).

Hamilton Climate — Monthly Normals 1991-2020

Climate in Hamilton

The typical year in Hamilton (Ontario), from 1991-2020 normals. For what's happening now, see the current forecast; a month ahead — the 30-day outlook.

Annual mean temp

9.8°C

average across 12 months

Annual precipitation

912 mm

yearly total

Warmest month

Jul

⌀ max 27°C

Coldest month

Feb

⌀ min -6°C

Temperatures by month

typical high (orange) · typical low (blue)

Jan

20° … 32°

Feb

20° … 35°

Mar

28° … 44°

Apr

36° … 54°

May

48° … 67°

Jun

59° … 77°

Jul

64° … 82°

Aug

63° … 79°

Sep

57° … 73°

Oct

46° … 60°

Nov

34° … 47°

Dec

27° … 38°

Precipitation by month

monthly totals across the year

Jan

75 mm

Feb

71 mm

Mar

65 mm

Apr

98 mm

May

74 mm

Jun

87 mm

Jul

90 mm

Aug

70 mm

Sep

60 mm

Oct

84 mm

Nov

59 mm

Dec

79 mm

The short version

RegionOntario

Latitude43.2501°N

Annual mean9.8°C

Annual precipitation912 mm

More cities · climate

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77 km →

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89 km →

Weather map — Hamilton

Hamilton →

Source · 1991-2020 normals

Hamilton, ON Climate