Annual mean 27°C · wettest around September · prevailing wind SE
Warmest
30.7 °C
Coldest
27.8 °C
Wettest
35%
Windiest
6.3 m/s
Prevailing
SE
4.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
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 Roseau over the whole year is 27°C. August is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 24°C. The rainy (wet) season in Roseau runs from July to December, peaking in September with a 39% chance of rain on a given day. The dry season is January to June; April is the driest month, at 17%. Winds in Roseau are highest in February, averaging 4.3 m/s (15 km/h), and lightest in September, at 2.6 m/s (9 km/h). The prevailing wind is from the SE. The clearest skies in Roseau come in October, when the sky is typically 56% covered; June is the cloudiest month, at 65%.
Month by month Roseau 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
28°C
24°C
29°C
22%
64%
3.6 m/s
26
69
3
February
28°C
24°C
29°C
21%
61%
4.3 m/s
34
71
4
March
28°C
24°C
29°C
21%
60%
3.5 m/s
28
73
2
April
29°C
25°C
30°C
17%
61%
3.5 m/s
20
64
2
May
30°C
26°C
32°C
17%
64%
3.6 m/s
5
61
0
June
30°C
27°C
32°C
24%
65%
4.2 m/s
3
56
0
July
30°C
26°C
33°C
34%
63%
3.7 m/s
1
48
0
August
31°C
26°C
34°C
32%
61%
3.2 m/s
1
34
0
September
30°C
26°C
34°C
39%
58%
2.6 m/s
2
26
1
October
30°C
25°C
34°C
32%
56%
2.8 m/s
1
33
1
November
30°C
25°C
32°C
31%
61%
2.9 m/s
3
52
0
December
29°C
24°C
30°C
30%
58%
3.5 m/s
16
66
1
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 Roseau weather by season
Year round, Roseau has days of about 28°C at their warmest in January, its coolest month, and 31°C in August, its warmest; the coolest hours of the day run from 24°C to 27°C through the year, and the average temperature over the year is 27°C around the clock. Rain is most likely around September and least likely around April. 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.
Roseau weather in winterDecember to February
High 28°CLow 24°CRain 24%
Winter in Roseau has typical daily highs of about 28°C and lows of about 24°C, with a 24% chance of rain on a given day.
Roseau weather in springMarch to May
High 29°CLow 25°CRain 18%
Spring in Roseau has typical daily highs of about 29°C and lows of about 25°C, with a 18% chance of rain on a given day.
Roseau weather in summerJune to August
High 30°CLow 26°CRain 30%
Summer in Roseau has typical daily highs of about 30°C and lows of about 26°C, with a 30% chance of rain on a given day.
Roseau weather in autumnSeptember to November
High 30°CLow 26°CRain 34%
Autumn in Roseau has typical daily highs of about 30°C and lows of about 26°C, with a 34% chance of rain on a given day.
When is the rainy season in Roseau?
The rainy (wet) season in Roseau runs from July to December, peaking in September with a 39% chance of rain on a given day. The dry season is January to June; April is the driest month, at 17%.
What time of year is Roseau windiest?
Winds in Roseau are highest in February, averaging 4.3 m/s (15 km/h), and lightest in September, at 2.6 m/s (9 km/h). The prevailing wind is from the SE.
What is the average temperature in Roseau year round?
The average temperature in Roseau over the whole year is 27°C. August is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 24°C.