Annual mean 11°C · wettest around December · prevailing wind W
Warmest
25.4 °C
Coldest
1.8 °C
Wettest
25%
Windiest
5.8 m/s
Prevailing
W
4.7 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Dartmouth over the whole year is 11°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -1°C. Dartmouth has no sharply defined rainy season: the chance of rain on a given day runs from 10% in June, the driest month, to 18% in December, the wettest. Winds in Dartmouth are highest in March, averaging 5.0 m/s (18 km/h), and lightest in August, at 3.4 m/s (12 km/h). The prevailing wind is from the W. The clearest skies in Dartmouth come in November, when the sky is typically 40% covered; May is the cloudiest month, at 51%.
Month by month Dartmouth 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
-1°C
-3°C
14%
50%
4.5 m/s
0
0
7
February
3°C
0°C
-2°C
16%
48%
4.5 m/s
1
0
12
March
6°C
2°C
1°C
14%
48%
5.0 m/s
2
0
23
April
11°C
7°C
7°C
18%
50%
4.6 m/s
11
0
50
May
16°C
12°C
14°C
17%
51%
4.2 m/s
45
6
76
June
21°C
17°C
22°C
10%
44%
3.7 m/s
79
29
58
July
25°C
21°C
27°C
10%
44%
3.5 m/s
52
63
20
August
25°C
20°C
26°C
10%
41%
3.4 m/s
60
56
26
September
21°C
17°C
21°C
12%
46%
3.7 m/s
75
25
59
October
16°C
12°C
14°C
12%
48%
4.1 m/s
50
5
77
November
10°C
6°C
6°C
13%
40%
4.5 m/s
11
0
43
December
5°C
2°C
-0°C
18%
45%
4.3 m/s
1
0
15
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 Dartmouth weather by season
Year round, Dartmouth has days of about 2°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -1°C to 21°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around December and least likely around June. 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.
Dartmouth weather in winterDecember to February
High 3°CLow 0°CRain 16%
Winter in Dartmouth has typical daily highs of about 3°C and lows of about 0°C, with a 16% chance of rain on a given day.
Dartmouth weather in springMarch to May
High 11°CLow 7°CRain 16%
Spring in Dartmouth has typical daily highs of about 11°C and lows of about 7°C, with a 16% chance of rain on a given day.
Dartmouth weather in summerJune to August
High 24°CLow 19°CRain 10%
Summer in Dartmouth has typical daily highs of about 24°C and lows of about 19°C, with a 10% chance of rain on a given day.
Dartmouth weather in autumnSeptember to November
High 16°CLow 12°CRain 12%
Autumn in Dartmouth has typical daily highs of about 16°C and lows of about 12°C, with a 12% chance of rain on a given day.
When is the rainy season in Dartmouth?
Dartmouth has no sharply defined rainy season: the chance of rain on a given day runs from 10% in June, the driest month, to 18% in December, the wettest.
What time of year is Dartmouth windiest?
Winds in Dartmouth are highest in March, averaging 5.0 m/s (18 km/h), and lightest in August, at 3.4 m/s (12 km/h). The prevailing wind is from the W.
What is the average temperature in Dartmouth year round?
The average temperature in Dartmouth over the whole year is 11°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -1°C.