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Climate & Weather Averages in Letterkenny, Ireland

Now
64 °F

Mild.


Feels Like: 64 °F
Forecast: 69 / 58 °F
Wind: 8 mph from North

Location: Castlederg
Current Time: Aug 12, 2020 at 1:54:21 pm
Latest Report: Aug 12, 2020 at 1:00 pm
Visibility: 19 mi
Pressure30.06 "Hg
Humidity: 81%
Dew Point: 58 °F
Location of LetterkennyLocation

Annual Weather Averages Near Letterkenny

Averages are for Castlederg, which is 18 miles from Letterkenny.

Based on weather reports collected during 2005–2015.

All Year Climate & Weather Averages in Letterkenny

High Temp: 67 °F

Low Temp: 34 °F

Mean Temp: 48 °F

Precipitation: 3.74"

Humidity: 86%

Dew Point: 44 °F

Wind: 8 mph

Pressure: 29.88 "Hg

Visibility: 13 mi

January Climate & Weather Averages in Letterkenny

High Temp: 45 °F

Low Temp: 34 °F

Mean Temp: 40 °F

Precipitation: 4.89"

Humidity: 90%

Dew Point: 37 °F

Wind: 9 mph

Pressure: 29.81 "Hg

Visibility: 11 mi

February Climate & Weather Averages in Letterkenny

High Temp: 47 °F

Low Temp: 35 °F

Mean Temp: 41 °F

Precipitation: 3.32"

Humidity: 89%

Dew Point: 38 °F

Wind: 8 mph

Pressure: 29.85 "Hg

Visibility: 11 mi

March Climate & Weather Averages in Letterkenny

High Temp: 50 °F

Low Temp: 35 °F

Mean Temp: 42 °F

Precipitation: 3.33"

Humidity: 84%

Dew Point: 38 °F

Wind: 9 mph

Pressure: 29.94 "Hg

Visibility: 12 mi

April Climate & Weather Averages in Letterkenny

High Temp: 56 °F

Low Temp: 38 °F

Mean Temp: 47 °F

Precipitation: 2.61"

Humidity: 80%

Dew Point: 41 °F

Wind: 8 mph

Pressure: 29.95 "Hg

Visibility: 13 mi

May Climate & Weather Averages in Letterkenny

High Temp: 59 °F

Low Temp: 43 °F

Mean Temp: 51 °F

Precipitation: 3.38"

Humidity: 80%

Dew Point: 45 °F

Wind: 9 mph

Pressure: 29.92 "Hg

Visibility: 13 mi

June Climate & Weather Averages in Letterkenny

High Temp: 65 °F

Low Temp: 47 °F

Mean Temp: 56 °F

Precipitation: 2.43"

Humidity: 80%

Dew Point: 50 °F

Wind: 7 mph

Pressure: 29.98 "Hg

Visibility: 14 mi

July Climate & Weather Averages in Letterkenny

High Temp: 67 °F

Low Temp: 51 °F

Mean Temp: 59 °F

Precipitation: 3.39"

Humidity: 84%

Dew Point: 54 °F

Wind: 7 mph

Pressure: 29.89 "Hg

Visibility: 14 mi

August Climate & Weather Averages in Letterkenny

High Temp: 65 °F

Low Temp: 51 °F

Mean Temp: 58 °F

Precipitation: 3.56"

Humidity: 86%

Dew Point: 53 °F

Wind: 7 mph

Pressure: 29.86 "Hg

Visibility: 16 mi

September Climate & Weather Averages in Letterkenny

High Temp: 62 °F

Low Temp: 48 °F

Mean Temp: 55 °F

Precipitation: 3.15"

Humidity: 88%

Dew Point: 51 °F

Wind: 7 mph

Pressure: 29.96 "Hg

Visibility: 12 mi

October Climate & Weather Averages in Letterkenny

High Temp: 57 °F

Low Temp: 43 °F

Mean Temp: 50 °F

Precipitation: 4.42"

Humidity: 90%

Dew Point: 47 °F

Wind: 7 mph

Pressure: 29.84 "Hg

Visibility: 12 mi

November Climate & Weather Averages in Letterkenny

High Temp: 50 °F

Low Temp: 38 °F

Mean Temp: 44 °F

Precipitation: 4.78"

Humidity: 91%

Dew Point: 42 °F

Wind: 8 mph

Pressure: 29.76 "Hg

Visibility: 11 mi

December Climate & Weather Averages in Letterkenny

High Temp: 45 °F

Low Temp: 34 °F

Mean Temp: 40 °F

Precipitation: 5.62"

Humidity: 91%

Dew Point: 37 °F

Wind: 9 mph

Pressure: 29.80 "Hg

Visibility: 11 mi

Quick Climate Info

Hottest MonthJuly (59 °F avg)
Coldest MonthDecember (40 °F avg)
Wettest MonthDecember (5.62" avg)
Windiest MonthJanuary (9 mph avg)
Annual precip.44.89" (per year)

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