Portrush monthly weather averages

Average daytime temperature

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

Portrush average temperature chart (Celsius) Portrush average temperature chart (Fahrenheit)
Average monthly temperatures in Portrush (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.6 6.7 8.4 10.6 13.2 15.8 16.9 16.9 15.1 12.6 9 7.5
°F 43.9 44.1 47 51 55.8 60.4 62.4 62.4 59.2 54.7 48.1 45.5

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.

Portrush monthly rainfall chart (mm) Portrush monthly rainfall chart (inches)
Average monthly rainfall in Portrush (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 118 80 91 65 66 70 77 92 107 124 115 113
inches 4.7 3.1 3.6 2.5 2.6 2.8 3 3.6 4.2 4.9 4.5 4.4
Rainy days 22 17 20 16 17 17 18 20 20 22 22 22

Average annual rainfall in Portrush: 1166.267mm (459.2 inches)

Average daily sunshine

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

Portrush average daily sunshine chart
Average daily sunshine Portrush
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.5 2.5 3.3 5.4 6.3 5.9 4.7 4.6 3.7 2.8 1.9 1.2

Day / night temperatures

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

Portrush average minimum / maximum temperatures (Celsius) Portrush average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Portrush (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.5 1.4 2.3 3.7 5.8 8.5 10.4 10.2 8.8 6.9 3.5 2.4
Max °C 6.8 6.9 8.5 10.8 13.4 16 17.1 17.1 15.3 12.8 9.1 7.6
Min °F 34.6 34.4 36.1 38.6 42.4 47.2 50.6 50.3 47.8 44.3 38.3 36.3
Max °F 39.4 39.4 41.7 45 49.3 54 56.7 56.5 53.6 49.6 43.3 41

Sea temperature

The graph below shows the average sea temperature.

Portrush average sea temperature chart (Celsius) Portrush average sea temperature chart (Fahrenheit)
Average sea temperature around Portrush in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.7 7.9 7.8 8.5 10 11.9 13.5 14.3 14 13 11.6 10.1
°F 47.7 46.2 46.1 47.4 50 53.5 56.3 57.8 57.2 55.4 52.8 50.1

Wind speed

The graph below shows the average wind speed.

Portrush average winspeed by month (km/h) Portrush average winspeed by month (mph)
Average wind speed in Portrush (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 28 27 26 22 21 19 19 19 22 25 26 27
mph 17 17 16 14 13 12 12 12 14 16 16 17

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.

Portrush relative humidity averages
Average relative humidity in Portrush
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
90% 87% 86% 84% 84% 85% 87% 88% 89% 90% 90% 91%

Other monthly averages

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Portrush weather stats

Portrush weather statistics
Hottest month: July 16.9°C 62.4°F
Driest month: April 65mm 2.6ins
Sunniest month: May 6.3hrs
Coldest month: January 6.6°C 43.9°F
Wettest month: October 124mm 4.9ins
Warmest sea: August 14.3°C 57.7°F
Map showing location of Portrush (55.19592, -6.6493) Portrush map pin © Google

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