Swansea monthly weather averages

Contents

Average daytime temperature

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

Swansea average temperature chart (Celsius) Swansea average temperature chart (Fahrenheit)
Average monthly temperatures in Swansea (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.4 7.2 9.1 11.6 14.7 17.6 19.5 19.3 17.2 14.3 10.4 8.4
°F 45.3 44.9 48.4 53 58.5 63.7 67.1 66.7 63 57.8 50.8 47.2

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.

Swansea monthly rainfall chart (mm) Swansea monthly rainfall chart (inches)
Average monthly rainfall in Swansea (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 133 89 96 69 77 78 75 103 111 130 138 140
inches 5.2 3.5 3.8 2.7 3 3.1 3 4 4.4 5.1 5.4 5.5
Rainy days 20 15 18 14 15 15 13 16 16 19 20 20

Average annual rainfall in Swansea: 1286.466mm (506.5 inches)

Average daily sunshine

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

Swansea average daily sunshine chart
Average daily sunshine Swansea
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2 2.8 4 6 7 7.2 6.6 6.4 5 3.5 2.7 1.8

Day / night temperatures

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

Swansea average minimum / maximum temperatures (Celsius) Swansea average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Swansea (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 2.9 2.5 3.6 5.2 8.1 11.1 13 13 11.3 9 5.5 3.9
Max °C 7.5 7.3 9.3 11.8 14.9 17.8 19.7 19.5 17.4 14.5 10.6 8.6
Min °F 37.2 36.5 38.4 41.4 46.6 51.9 55.3 55.3 52.3 48.1 41.8 38.9
Max °F 41.4 40.8 43.5 47.3 52.7 57.9 61.3 61.2 57.7 53.1 46.4 43.2

Sea temperature

The graph below shows the average sea temperature.

Swansea average sea temperature chart (Celsius) Swansea average sea temperature chart (Fahrenheit)
Average sea temperature around Swansea in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 10.2 9.3 9.2 9.9 11.2 13.1 15.1 16.2 16.1 14.9 13.3 11.6
°F 50.3 48.8 48.6 49.8 52.2 55.6 59.1 61.2 60.9 58.8 55.9 52.9

Wind speed

The graph below shows the average wind speed.

Swansea average winspeed by month (km/h) Swansea average winspeed by month (mph)
Average wind speed in Swansea (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 21 21 21 19 18 17 16 17 18 19 21 22
mph 13 13 13 12 11 10 10 10 11 12 13 14

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.

Swansea relative humidity averages
Average relative humidity in Swansea
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
90% 88% 85% 82% 81% 83% 84% 85% 86% 88% 88% 91%
Swansea

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Swansea weather stats

Swansea weather statistics
Hottest month: July 19.5°C 67.1°F
Driest month: April 69mm 2.7ins
Sunniest month: May 7hrs
Coldest month: February 7.2°C 45°F
Wettest month: December 140mm 5.5ins
Warmest sea: August 16.2°C 61.2°F
Map showing location of Swansea (51.62079, -3.94323) Swansea map pin © Google

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