Portsmouth Climate: Weather by Month and Best Time to Visit

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

Best time to visit

Year at a glance

Jan 3.9 Feb 4.2 Mar 4.6 Apr 5.7 May 6.7 Jun 7.5 Jul 7.7 Aug 7.9 Sep 7.7 Oct 6.5 Nov 5.7 Dec 4.3

Weather by month

Month	Avg high	Avg low	Rainfall	Rainy days	Humidity	Sunshine	Score
January	1°C	-5°C	91 mm	10	–	–	3.9
February	2°C	-5°C	85 mm	9	–	–	4.2
March	5°C	-1°C	113 mm	11	–	–	4.6
April	11°C	4°C	108 mm	11	–	–	5.7
May	16°C	10°C	82 mm	11	–	–	6.7
June	21°C	15°C	91 mm	11	–	–	7.5
July	24°C	18°C	78 mm	10	–	–	7.7
August	24°C	18°C	83 mm	9	–	–	7.9
September	20°C	14°C	87 mm	9	–	–	7.7
October	15°C	9°C	111 mm	10	–	–	6.5
November	9°C	3°C	96 mm	10	–	–	5.7
December	4°C	-2°C	117 mm	11	–	–	4.3