Rotterdam monthly weather averages

Average daytime temperature

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

Rotterdam average temperature chart (Celsius) Rotterdam average temperature chart (Fahrenheit)
Average monthly temperatures in Rotterdam (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.3 5.8 8.9 11.8 16.4 18.9 20.8 21.1 18.2 14.2 9.4 6.8
°F 41.6 42.4 48 53.2 61.5 66 69.4 70 64.7 57.5 48.9 44.3

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.

Rotterdam monthly rainfall chart (mm) Rotterdam monthly rainfall chart (inches)
Average monthly rainfall in Rotterdam (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 70 44 66 43 53 68 71 68 75 84 83 77
inches 2.8 1.7 2.6 1.7 2.1 2.7 2.8 2.7 2.9 3.3 3.3 3
Rainy days 19 12 17 13 14 13 13 13 15 16 18 19

Average daily sunshine

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

Rotterdam average daily sunshine chart
Average daily sunshine Rotterdam
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.6 3.1 3.6 5.7 7.3 7 7 6.7 4.9 3.5 2.2 1.3

Day / night temperatures

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

Rotterdam average minimum / maximum temperatures (Celsius) Rotterdam average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Rotterdam (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 0.6 0.1 2 3.6 7.4 10.5 12.6 12.5 10.3 7.3 3.9 2.1
Max °C 5.5 5.9 9.1 12 16.6 19.1 21 21.4 18.4 14.4 9.5 7
Min °F 33 32.2 35.5 38.5 45.3 50.9 54.7 54.4 50.5 45.1 39 35.7
Max °F 37.4 37.4 41.9 46 53.6 58.6 62.2 62.4 57.7 51.4 44.1 40.1

Sea temperature

The graph below shows the average sea temperature.

Rotterdam average sea temperature chart (Celsius) Rotterdam average sea temperature chart (Fahrenheit)
Average sea temperature around Rotterdam in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.3 6.3 6.6 8.6 11.3 14.2 16.8 18.4 17.7 15.3 12.1 9.2
°F 45.1 43.3 43.9 47.5 52.4 57.6 62.3 65.1 63.9 59.6 53.8 48.5

Wind speed

The graph below shows the average wind speed.

Rotterdam average winspeed by month (km/h) Rotterdam average winspeed by month (mph)
Average wind speed in Rotterdam (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 21 21 21 18 18 17 17 16 16 17 21 21
mph 13 13 13 11 11 11 11 10 10 11 13 13

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.

Rotterdam relative humidity averages
Average relative humidity in Rotterdam
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
88% 85% 84% 80% 78% 80% 79% 80% 83% 86% 87% 89%
Rotterdam

Other monthly averages

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Rotterdam weather stats

Rotterdam weather statistics
Hottest month: August 21.1°C 70°F
Driest month: April 43mm 1.7ins
Sunniest month: May 7.3hrs
Coldest month: January 5.3°C 41.5°F
Wettest month: October 84mm 3.3ins
Warmest sea: August 18.4°C 65.1°F
Map showing location of Rotterdam (51.9225, 4.47917)

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