Saint John Climate: Weather by Month and Best Time to Visit

Best months for Saint John: August, July.

Best time to visit

Year at a glance

Jan 3.4 Feb 3.7 Mar 3.8 Apr 4.7 May 5.6 Jun 6.3 Jul 7.0 Aug 7.4 Sep 6.7 Oct 5.8 Nov 4.9 Dec 3.5

Weather by month

Month	Avg high	Avg low	Rainfall	Rainy days	Humidity	Sunshine	Score
January	-2°C	-9°C	112 mm	12	–	–	3.4
February	-1°C	-8°C	96 mm	10	–	–	3.7
March	2°C	-4°C	112 mm	12	–	–	3.8
April	6°C	1°C	105 mm	12	–	–	4.7
May	11°C	6°C	103 mm	12	–	–	5.6
June	15°C	11°C	108 mm	12	–	–	6.3
July	18°C	14°C	91 mm	11	–	–	7.0
August	19°C	15°C	81 mm	9	–	–	7.4
September	16°C	12°C	108 mm	10	–	–	6.7
October	12°C	7°C	133 mm	11	–	–	5.8
November	7°C	2°C	128 mm	11	–	–	4.9
December	2°C	-4°C	137 mm	13	–	–	3.5