What is the hottest month in Oakville?

July — average highs around 82° with lows near 65°.

What is the coldest month in Oakville?

January, when nights typically drop to 20° and days top out near 32°.

What is the rainiest month in Oakville?

April, averaging about 3.7 in of precipitation; the driest is September at roughly 2.1 in.

How warm is Oakville over the year?

The annual mean is 50°, with about 34 in of precipitation in a typical year (1991-2020 normals).

Oakville Climate — Monthly Normals 1991-2020

Climate in Oakville

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

Annual mean temp

9.9°C

average across 12 months

Annual precipitation

874 mm

yearly total

Warmest month

Jul

⌀ max 27°C

Coldest month

Jan

⌀ min -6°C

Temperatures by month

typical high (orange) · typical low (blue)

Jan

20° … 32°

Feb

20° … 35°

Mar

28° … 44°

Apr

36° … 53°

May

49° … 66°

Jun

60° … 77°

Jul

65° … 82°

Aug

64° … 79°

Sep

58° … 73°

Oct

47° … 60°

Nov

35° … 47°

Dec

28° … 38°

Precipitation by month

monthly totals across the year

Jan

70 mm

Feb

69 mm

Mar

63 mm

Apr

94 mm

May

72 mm

Jun

93 mm

Jul

78 mm

Aug

66 mm

Sep

52 mm

Oct

82 mm

Nov

59 mm

Dec

76 mm

The short version

RegionOntario

Latitude43.4501°N

Annual mean9.9°C

Annual precipitation874 mm

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Weather map — Oakville

Oakville →

Source · 1991-2020 normals

Oakville, ON Climate