Sunbury-on-Thames monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Sunbury-on-Thames

Sunbury-on-Thames average temperature chart (Celsius) Sunbury-on-Thames average temperature chart (Fahrenheit)
Average monthly temperatures in Sunbury-on-Thames (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.9 7.3 9.9 12.7 16.5 19.9 21.9 21.4 18.7 14.9 10 7.7
°F 44.4 45.1 49.8 54.9 61.7 67.8 71.4 70.5 65.7 58.9 50.1 45.8

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.

Sunbury-on-Thames monthly rainfall chart (mm) Sunbury-on-Thames monthly rainfall chart (inches)
Average monthly rainfall in Sunbury-on-Thames (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 55 36 48 45 52 50 44 54 52 59 59 60
inches 2.2 1.4 1.9 1.8 2 2 1.7 2.1 2.1 2.3 2.3 2.4
Rainy days 18 13 15 15 14 12 11 12 12 14 16 16

Average annual rainfall in Sunbury-on-Thames: 664.2mm (261.5 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Sunbury-on-Thames

Sunbury-on-Thames average daily sunshine chart
Average daily sunshine Sunbury-on-Thames
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.9 2.7 3.9 5.3 6.8 7.4 6.7 6.6 5.3 3.9 2.6 1.7

Day / night temperatures

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

Sunbury-on-Thames average minimum / maximum temperatures (Celsius) Sunbury-on-Thames average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Sunbury-on-Thames (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.4 1.4 2.6 4.3 7.3 10.3 12.3 12 10.1 7.5 3.8 2.2
Max °C 7 7.4 10.1 12.9 16.7 20.1 22.1 21.6 19 15.1 10.2 7.8
Min °F 34.5 34.5 36.6 39.7 45.1 50.5 54.1 53.6 50.1 45.5 38.8 36
Max °F 39.6 39.9 43.3 47.5 53.6 59.4 63 62.2 58.1 52.3 44.6 41

Sea temperature

The graph below shows the average sea temperature.

Sunbury-on-Thames average sea temperature chart (Celsius) Sunbury-on-Thames average sea temperature chart (Fahrenheit)
Average sea temperature around Sunbury-on-Thames in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.9 7.9 7.9 9.1 11 13.3 15.5 17 17 15.6 13.2 10.7
°F 48 46.2 46.2 48.4 51.8 55.9 59.9 62.6 62.6 60 55.7 51.3

Wind speed

The graph below shows the average wind speed.

Sunbury-on-Thames average winspeed by month (km/h) Sunbury-on-Thames average winspeed by month (mph)
Average wind speed in Sunbury-on-Thames (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 15 15 16 15 14 13 12 12 12 12 14 15
mph 9 9 10 9 9 8 8 8 8 8 9 9

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.

Sunbury-on-Thames relative humidity averages
Average relative humidity in Sunbury-on-Thames
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
90% 86% 82% 78% 76% 75% 75% 78% 83% 87% 89% 91%

Other monthly averages

UV index Best time to go?

Sunbury-on-Thames weather stats

Sunbury-on-Thames weather statistics
Hottest month: July 21.9°C 71.4°F
Driest month: February 36mm 1.4ins
Sunniest month: August 6.6hrs
Coldest month: January 6.9°C 44.4°F
Wettest month: December 60mm 2.4ins
Warmest sea: August 17°C 62.6°F
Map showing location of Sunbury-on-Thames (51.40606, -0.4137) Sunbury-on-Thames map pin © Google

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