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 6.2 6.3 8.2 10.8 13.5 16.1 17.2 17.1 15 12.3 8.4 7
°F 43.1 43.4 46.8 51.4 56.2 60.9 63 62.8 59.1 54.1 47.1 44.6

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 130 94 99 73 81 78 81 99 109 127 120 124
inches 5.1 3.7 3.9 2.9 3.2 3.1 3.2 3.9 4.3 5 4.7 4.9
Rainy days 23 18 21 17 18 18 19 20 21 22 22 23

Average annual rainfall in Derry: 1262.567mm (497.1 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 1.5 2.5 3.3 5.3 6 5.6 4.5 4.5 3.7 2.8 2 1.2

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 0.9 0.8 1.8 3.1 5.4 8.2 10 9.7 8.2 6.4 2.7 1.9
Max °C 6.3 6.5 8.4 11 13.7 16.3 17.4 17.3 15.2 12.5 8.6 7.1
Min °F 33.6 33.4 35.2 37.5 41.6 46.7 50 49.5 46.8 43.4 36.8 35.4
Max °F 38.5 38.5 41.2 44.6 49.1 54 56.7 56.3 53.1 48.9 42.1 40.1

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 9.4 8.7 8.6 9.1 10.5 12.4 14 14.6 14.1 12.9 11.6 10.4
°F 48.9 47.6 47.4 48.4 50.9 54.3 57.1 58.3 57.4 55.3 52.9 50.7

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 27 26 26 22 21 19 19 19 22 24 25 27
mph 17 16 16 14 13 12 12 12 14 15 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.

Derry relative humidity averages
Average relative humidity in Derry
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
91% 87% 85% 84% 83% 83% 87% 88% 90% 91% 92% 93%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Derry weather stats

Derry weather statistics
Hottest month: July 17.2°C 63°F
Driest month: April 73mm 2.9ins
Sunniest month: April 5.3hrs
Coldest month: January 6.2°C 43.2°F
Wettest month: January 130mm 5.1ins
Warmest sea: August 14.6°C 58.3°F
Map showing location of Derry (54.9981, -7.30934) Derry map pin © Google

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