Derry monthly weather averages

Contents

Average daytime temperature

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

Derry average temperature chart (Celsius) Derry average temperature chart (Fahrenheit)
Average monthly temperatures in Derry (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.3 8.3 9.9 11.7 13.9 16.5 18.3 18 16.3 13.6 10.5 9.2
°F 47 47 49.7 53 57.1 61.7 64.9 64.5 61.3 56.5 50.9 48.6

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.

Derry monthly rainfall chart (mm) Derry monthly rainfall chart (inches)
Average monthly rainfall in Derry (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 150 116 110 72 85 69 74 97 123 129 132 152
inches 5.9 4.6 4.3 2.8 3.3 2.7 2.9 3.8 4.9 5.1 5.2 6
Rainy days 22 19 19 16 18 16 15 18 18 21 21 22

Average annual rainfall in Derry: 1352mm (532.3 inches)

Average daily sunshine

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

Derry average daily sunshine chart
Average daily sunshine Derry
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.9 2.6 3.8 5.7 6.5 6.1 5.7 5.5 4.4 3.1 2.4 1.8

Day / night temperatures

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

Derry average minimum / maximum temperatures (Celsius) Derry average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Derry (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 3.6 3.4 4 5 7.1 9.8 11.6 11.4 10.2 8.3 5.4 4.5
Max °C 8.5 8.5 10 11.9 14.1 16.7 18.5 18.2 16.5 13.8 10.6 9.4
Min °F 38.4 38 39.2 40.9 44.8 49.6 52.8 52.5 50.3 46.9 41.7 40
Max °F 42.8 42.6 44.6 47.1 51.1 55.8 59 58.6 55.9 51.8 46.4 44.4

Sea temperature

The graph below shows the average sea temperature.

Derry average sea temperature chart (Celsius) Derry average sea temperature chart (Fahrenheit)
Average sea temperature around Derry in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 10.4 9.9 9.8 10.3 11.8 14 15.9 16.4 15.6 13.9 12.2 11
°F 50.7 49.9 49.6 50.6 53.2 57.2 60.6 61.6 60 57.1 53.9 51.8

Wind speed

The graph below shows the average wind speed.

Derry average winspeed by month (km/h) Derry average winspeed by month (mph)
Average wind speed in Derry (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 24 23 23 19 19 17 17 17 19 21 21 23
mph 15 15 14 12 12 11 10 11 12 13 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.

Derry relative humidity averages
Average relative humidity in Derry
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
89% 87% 84% 82% 81% 83% 83% 85% 86% 88% 89% 91%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Derry weather stats

Derry weather statistics
Hottest month: July 18.3°C 64.9°F
Driest month: June 69mm 2.7ins
Sunniest month: May 6.5hrs
Coldest month: February 8.3°C 46.9°F
Wettest month: December 152mm 6ins
Warmest sea: August 16.4°C 61.5°F
Map showing location of Derry (51.58666, -9.05026) Derry map pin © Google

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