Spring (March–May): Avg. -46–50°F, cold and changeable weather with frequent alternating snow and rain, gradually warming as the season progresses. Common activities: Maple viewing (late March to early April, weather permitting), spring outings (May). Recommended clothing: Warm coat, sweater, waterproof jacket, scarf, hat.
Summer (June–August): Avg. 59–63°F, warm and humid with higher rainfall. Common activities: Camping, boating, hiking. Recommended clothing: Light and breathable clothing, rain gear.
Autumn (September–November): Avg. 42–55°F, cool and pleasant with moderate rainfall, gradually cooling down with changing leaves. Common activities: Maple viewing, harvesting. Recommended clothing: Light jacket, long-sleeved clothing.
Winter (December–February): Avg. -16.5–-47.8°F, cold and dry with significant snowfall. Common activities: Skiing, ice fishing, snow activities. Recommended clothing: Heavy warm coat, warm hat, scarf, gloves, waterproof snow boots.
Ontario climatological average
Annual average temperature: approx. 36.1°F / Annual rainfall: approx. 581 mm / Summer humidity: 65%–75% / Rainiest month: July
Ontario monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
2.3°F
15.9
February
4.5°F
25.6
March
17.2°F
20.3
April
32°F
53
May
50.4°F
59
June
59.5°F
72
July
63.7°F
86.8
August
61.5°F
84.7
September
55.4°F
43.3
October
42.1°F
60
November
28°F
39.7
December
16.2°F
21.3
Ontario weather for the next seven days
10/14
Tuesday
Partly Cloudy
46.8°F/34°F
10/15
Wednesday
Partly Cloudy
52°F/39.4°F
10/16
Thursday
Sunny
55.2°F/40.6°F
10/17
Friday
Patchy rain nearby
59.7°F/45.9°F
10/18
Saturday
Patchy rain nearby
61.9°F/41.5°F
10/19
Sunday
Patchy rain nearby
40°F/37.8°F
10/20
Monday
Overcast
40.3°F/38.7°F
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