Annual mean 7°C · wettest around December · prevailing wind W
Warmest
23.7 °C
Coldest
-2.8 °C
Wettest
32%
Windiest
6.5 m/s
Prevailing
W
5.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Cape Breton over the whole year is 7°C. August is the hottest month, with highs of about 23°C; February is the coldest, with lows of about -5°C. The rainy (wet) season in Cape Breton runs from November to April, peaking in December with a 31% chance of rain on a given day. The dry season is May to October; July is the driest month, at 14%. Winds in Cape Breton are highest in February, averaging 5.1 m/s (18 km/h), and lightest in July, at 3.6 m/s (13 km/h). The prevailing wind is from the W. The clearest skies in Cape Breton come in August, when the sky is typically 61% covered; January is the cloudiest month, at 81%.
Month by month Cape Breton climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-2°C
-4°C
-8°C
28%
81%
5.0 m/s
0
0
1
February
-2°C
-5°C
-9°C
27%
73%
5.1 m/s
0
0
1
March
1°C
-3°C
-6°C
23%
70%
4.9 m/s
0
0
3
April
5°C
1°C
-1°C
24%
70%
4.8 m/s
1
0
11
May
11°C
5°C
6°C
20%
66%
4.3 m/s
10
1
40
June
17°C
11°C
14°C
19%
68%
4.0 m/s
45
6
68
July
22°C
16°C
21°C
14%
66%
3.6 m/s
74
26
58
August
23°C
16°C
21°C
16%
61%
3.6 m/s
80
25
59
September
18°C
13°C
16°C
18%
62%
4.0 m/s
55
6
73
October
13°C
8°C
9°C
21%
66%
4.1 m/s
18
0
58
November
6°C
4°C
1°C
29%
75%
5.0 m/s
3
0
15
December
1°C
-1°C
-5°C
31%
79%
5.1 m/s
0
0
2
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Cape Breton weather by season
Year round, Cape Breton has days of about -2°C at their warmest in February, its coolest month, and 23°C in August, its warmest; the coolest hours of the day run from -5°C to 16°C through the year, and the average temperature over the year is 7°C around the clock. Rain is most likely around December and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Cape Breton weather in winterDecember to February
High -1°CLow -3°CRain 28%
Winter in Cape Breton has typical daily highs of about -1°C and lows of about -3°C, with a 28% chance of rain on a given day.
Cape Breton weather in springMarch to May
High 5°CLow 1°CRain 22%
Spring in Cape Breton has typical daily highs of about 5°C and lows of about 1°C, with a 22% chance of rain on a given day.
Cape Breton weather in summerJune to August
High 21°CLow 14°CRain 16%
Summer in Cape Breton has typical daily highs of about 21°C and lows of about 14°C, with a 16% chance of rain on a given day.
Cape Breton weather in autumnSeptember to November
High 12°CLow 8°CRain 23%
Autumn in Cape Breton has typical daily highs of about 12°C and lows of about 8°C, with a 23% chance of rain on a given day.
When is the rainy season in Cape Breton?
The rainy (wet) season in Cape Breton runs from November to April, peaking in December with a 31% chance of rain on a given day. The dry season is May to October; July is the driest month, at 14%.
What time of year is Cape Breton windiest?
Winds in Cape Breton are highest in February, averaging 5.1 m/s (18 km/h), and lightest in July, at 3.6 m/s (13 km/h). The prevailing wind is from the W.
What is the average temperature in Cape Breton year round?
The average temperature in Cape Breton over the whole year is 7°C. August is the hottest month, with highs of about 23°C; February is the coldest, with lows of about -5°C.