Annual mean 17°C · wettest around December · prevailing wind SW
Warmest
30.3 °C
Coldest
9.1 °C
Wettest
26%
Windiest
4.2 m/s
Prevailing
SW
3.4 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 Duluth over the whole year is 17°C. July is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 3°C. Duluth has no sharply defined rainy season: the chance of rain on a given day runs from 15% in September, the driest month, to 23% in December, the wettest. Winds in Duluth are highest in January, averaging 2.7 m/s (10 km/h), and lightest in August, at 1.8 m/s (6 km/h). The prevailing wind is from the SW. The clearest skies in Duluth come in October, when the sky is typically 33% covered; February is the cloudiest month, at 49%.
Month by month Duluth 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
9°C
3°C
5°C
21%
43%
2.7 m/s
11
0
37
February
13°C
6°C
10°C
20%
49%
2.7 m/s
28
1
59
March
17°C
8°C
13°C
20%
41%
2.7 m/s
46
2
73
April
21°C
12°C
18°C
18%
35%
2.6 m/s
67
14
67
May
25°C
17°C
24°C
21%
42%
2.4 m/s
64
44
36
June
29°C
21°C
29°C
18%
40%
2.1 m/s
30
65
7
July
30°C
23°C
33°C
16%
38%
1.9 m/s
7
53
0
August
29°C
22°C
32°C
17%
41%
1.8 m/s
14
56
3
September
27°C
19°C
28°C
15%
36%
1.8 m/s
40
56
19
October
23°C
13°C
21°C
15%
33%
1.9 m/s
72
26
57
November
16°C
8°C
13°C
18%
37%
2.2 m/s
41
3
72
December
11°C
5°C
8°C
23%
46%
2.5 m/s
16
0
52
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 Duluth weather by season
Year round, Duluth has days of about 9°C at their warmest in January, its coolest month, and 30°C in July, its warmest; the coolest hours of the day run from 3°C to 23°C through the year, and the average temperature over the year is 17°C around the clock. Rain is most likely around December and least likely around September. 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.
Duluth weather in winterDecember to February
High 11°CLow 5°CRain 21%
Winter in Duluth has typical daily highs of about 11°C and lows of about 5°C, with a 21% chance of rain on a given day.
Duluth weather in springMarch to May
High 21°CLow 13°CRain 19%
Spring in Duluth has typical daily highs of about 21°C and lows of about 13°C, with a 19% chance of rain on a given day.
Duluth weather in summerJune to August
High 29°CLow 22°CRain 17%
Summer in Duluth has typical daily highs of about 29°C and lows of about 22°C, with a 17% chance of rain on a given day.
Duluth weather in autumnSeptember to November
High 22°CLow 13°CRain 16%
Autumn in Duluth has typical daily highs of about 22°C and lows of about 13°C, with a 16% chance of rain on a given day.
When is the rainy season in Duluth?
Duluth has no sharply defined rainy season: the chance of rain on a given day runs from 15% in September, the driest month, to 23% in December, the wettest.
What time of year is Duluth windiest?
Winds in Duluth are highest in January, averaging 2.7 m/s (10 km/h), and lightest in August, at 1.8 m/s (6 km/h). The prevailing wind is from the SW.
What is the average temperature in Duluth year round?
The average temperature in Duluth over the whole year is 17°C. July is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 3°C.