Letterkenny monthly weather averages

Contents

Average daytime temperature

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

Letterkenny average temperature chart (Celsius) Letterkenny average temperature chart (Fahrenheit)
Average monthly temperatures in Letterkenny (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.4 6.5 8.3 10.6 13.2 15.8 16.8 16.9 14.9 12.3 8.5 7.1
°F 43.5 43.7 46.9 51.1 55.8 60.4 62.3 62.4 58.9 54.2 47.3 44.8

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.

Letterkenny monthly rainfall chart (mm) Letterkenny monthly rainfall chart (inches)
Average monthly rainfall in Letterkenny (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 137 96 98 74 82 78 87 98 120 132 137 141
inches 5.4 3.8 3.9 2.9 3.2 3.1 3.4 3.9 4.7 5.2 5.4 5.5
Rainy days 24 18 22 18 19 18 19 20 22 23 23 24

Average annual rainfall in Letterkenny: 1326.067mm (522.1 inches)

Average daily sunshine

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

Letterkenny average daily sunshine chart
Average daily sunshine Letterkenny
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.6 2.5 3.4 5.3 6 5.8 4.6 4.6 3.8 2.8 2 1.2

Day / night temperatures

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

Letterkenny average minimum / maximum temperatures (Celsius) Letterkenny average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Letterkenny (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.1 1 2 3.2 5.4 8.3 10 9.8 8.3 6.6 3 2.2
Max °C 6.5 6.7 8.5 10.8 13.4 16 17 17.1 15.1 12.5 8.7 7.3
Min °F 34 33.7 35.5 37.8 41.7 46.9 50 49.6 46.9 43.8 37.3 35.9
Max °F 38.8 38.8 41.4 44.6 48.9 53.8 56.3 56.1 53.1 49.1 42.4 40.5

Sea temperature

The graph below shows the average sea temperature.

Letterkenny average sea temperature chart (Celsius) Letterkenny average sea temperature chart (Fahrenheit)
Average sea temperature around Letterkenny 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.

Letterkenny average winspeed by month (km/h) Letterkenny average winspeed by month (mph)
Average wind speed in Letterkenny (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.

Letterkenny relative humidity averages
Average relative humidity in Letterkenny
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
91% 88% 86% 85% 84% 84% 87% 89% 90% 91% 92% 93%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Letterkenny weather stats

Letterkenny weather statistics
Hottest month: July 16.8°C 62.2°F
Driest month: April 74mm 2.9ins
Sunniest month: April 5.3hrs
Coldest month: January 6.4°C 43.5°F
Wettest month: December 141mm 5.6ins
Warmest sea: August 14.6°C 58.3°F
Map showing location of Letterkenny (54.95, -7.73333) Letterkenny map pin © Google

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