Roseau monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Roseau

Roseau average temperature chart (Celsius) Roseau average temperature chart (Fahrenheit)
Average monthly temperatures in Roseau (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 28.4 28.6 29.3 30 30.8 31 30.8 31 31.1 30.4 30 29.1
°F 83.1 83.4 84.8 85.9 87.4 87.7 87.4 87.7 88 86.6 86 84.4

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Roseau monthly rainfall chart (mm) Roseau monthly rainfall chart (inches)
Average monthly rainfall in Roseau (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 132 87 90 90 138 179 106 242 247 246 265 177
inches 5.2 3.4 3.6 3.6 5.4 7.1 4.2 9.5 9.7 9.7 10.4 7
Rainy days 18 14 15 14 17 19 20 20 23 19 19 18

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Roseau

Roseau average daily sunshine chart
Average daily sunshine Roseau
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 7.4 7.9 8.1 8.7 8.4 8 8 8.4 7.6 7.6 7.3 7.1

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Roseau average minimum / maximum temperatures (Celsius) Roseau average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Roseau (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 21 20.6 21.1 21.7 22.9 23.4 23.5 23.7 23.4 22.9 22.4 21.5
Max °C 28.6 28.8 29.6 30.2 31 31.2 31 31.1 31.3 30.5 30.2 29.3
Min °F 69.9 69.1 69.9 71.1 73.1 74.1 74.3 74.6 74.2 73.2 72.4 70.7
Max °F 76.6 76.5 77.5 78.7 80.4 81.1 81 81.3 81.3 80.1 79.3 77.7

Sea temperature

The graph below shows the average sea temperature.

Roseau average sea temperature chart (Celsius) Roseau average sea temperature chart (Fahrenheit)
Average sea temperature around Roseau in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 26.9 26.5 26.5 27.1 27.7 28.1 28.2 28.7 29 28.9 28.4 27.6
°F 80.4 79.7 79.8 80.8 81.9 82.5 82.8 83.6 84.2 84 83.1 81.7

Wind speed

The graph below shows the average wind speed.

Roseau average winspeed by month (km/h) Roseau average winspeed by month (mph)
Average wind speed in Roseau (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 17 18 18 17 18 20 20 18 14 13 14 16
mph 11 11 11 11 11 13 13 11 9 8 9 10

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Roseau relative humidity averages
Average relative humidity in Roseau
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
78% 77% 76% 77% 78% 79% 81% 81% 81% 82% 81% 80%

Other monthly averages

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Roseau weather stats

Roseau weather statistics
Hottest month: August 31°C 87.8°F
Driest month: February 87mm 3.4ins
Sunniest month: April 8.7hrs
Coldest month: February 28.6°C 83.5°F
Wettest month: November 265mm 10.4ins
Warmest sea: September 29°C 84.2°F
Map showing location of Roseau (15.30174, -61.38808)

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