Letterkenny Climate: Weather by Month and Best Time to Visit

Best months for Letterkenny: September, June, July, August.

Best time to visit

Year at a glance

Jan 4.1 Feb 4.6 Mar 4.7 Apr 5.2 May 5.6 Jun 5.9 Jul 5.8 Aug 5.8 Sep 6.0 Oct 5.2 Nov 4.4 Dec 4.2

Weather by month

Month	Avg high	Avg low	Rainfall	Rainy days	Humidity	Sunshine	Score
January	7°C	3°C	108 mm	19	–	–	4.1
February	8°C	3°C	93 mm	16	–	–	4.6
March	9°C	4°C	88 mm	17	–	–	4.7
April	11°C	5°C	80 mm	16	–	–	5.2
May	14°C	7°C	86 mm	16	–	–	5.6
June	16°C	10°C	92 mm	16	–	–	5.9
July	17°C	12°C	101 mm	18	–	–	5.8
August	17°C	12°C	105 mm	18	–	–	5.8
September	16°C	10°C	88 mm	15	–	–	6.0
October	13°C	8°C	105 mm	17	–	–	5.2
November	10°C	5°C	110 mm	19	–	–	4.4
December	8°C	3°C	113 mm	18	–	–	4.2