Southampton monthly weather averages

Average daytime temperature

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

Southampton average temperature chart (Celsius) Southampton average temperature chart (Fahrenheit)
Average monthly temperatures in Southampton (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.4 7.6 9.8 12.7 16 19.2 21.2 21 18.6 15.1 10.6 8.2
°F 45.3 45.7 49.7 54.8 60.9 66.6 70.2 69.9 65.5 59.2 51.1 46.7

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.

Southampton monthly rainfall chart (mm) Southampton monthly rainfall chart (inches)
Average monthly rainfall in Southampton (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 81 56 63 47 54 51 41 55 67 74 79 83
inches 3.2 2.2 2.5 1.9 2.1 2 1.6 2.2 2.6 2.9 3.1 3.3
Rainy days 17 13 14 12 13 11 9 11 12 14 15 16

Average daily sunshine

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

Southampton average daily sunshine chart
Average daily sunshine Southampton
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2.1 3 4.2 6 7.3 7.6 7.4 6.9 5.5 3.9 2.9 2.1

Day / night temperatures

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

Southampton average minimum / maximum temperatures (Celsius) Southampton average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Southampton (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 2.1 2.1 3 4.8 7.6 10.6 12.4 12.4 10.6 8.4 4.7 2.7
Max °C 7.5 7.8 10 12.9 16.3 19.5 21.5 21.3 18.8 15.3 10.8 8.3
Min °F 35.8 35.7 37.4 40.6 45.6 51 54.2 54.2 51.1 47 40.4 36.9
Max °F 40.6 40.8 43.7 47.8 53.4 59 62.4 62.2 58.5 53.2 45.9 41.9

Sea temperature

The graph below shows the average sea temperature.

Southampton average sea temperature chart (Celsius) Southampton average sea temperature chart (Fahrenheit)
Average sea temperature around Southampton in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 9.6 8.6 8.5 9.5 11.2 13.5 15.6 16.9 16.9 15.7 13.6 11.4
°F 49.3 47.4 47.3 49.1 52.2 56.3 60.1 62.4 62.3 60.2 56.6 52.5

Wind speed

The graph below shows the average wind speed.

Southampton average winspeed by month (km/h) Southampton average winspeed by month (mph)
Average wind speed in Southampton (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 17 17 17 16 15 14 13 14 14 14 16 17
mph 11 10 11 10 9 9 8 9 9 9 10 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.

Southampton relative humidity averages
Average relative humidity in Southampton
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
92% 89% 85% 82% 82% 82% 82% 82% 86% 89% 91% 92%

Other monthly averages

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Southampton weather stats

Southampton weather statistics
Hottest month: July 21.2°C 70.2°F
Driest month: July 41mm 1.6ins
Sunniest month: August 6.9hrs
Coldest month: January 7.4°C 45.3°F
Wettest month: December 83mm 3.3ins
Warmest sea: August 16.9°C 62.4°F
Map showing location of Southampton (50.90395, -1.40428)

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