St. Catharines Climate: Weather by Month and Best Time to Visit

Best months for St. Catharines: August, September, July, June.

Best time to visit

Year at a glance

Jan 3.5 Feb 3.9 Mar 4.6 Apr 5.5 May 6.5 Jun 7.5 Jul 7.6 Aug 7.8 Sep 7.7 Oct 6.2 Nov 5.4 Dec 4.3

Weather by month

Month	Avg high	Avg low	Rainfall	Rainy days	Humidity	Sunshine	Score
January	0°C	-5°C	76 mm	12	–	–	3.5
February	0°C	-6°C	60 mm	9	–	–	3.9
March	4°C	-2°C	73 mm	10	–	–	4.6
April	10°C	4°C	97 mm	11	–	–	5.5
May	16°C	10°C	84 mm	11	–	–	6.5
June	22°C	16°C	92 mm	11	–	–	7.5
July	25°C	20°C	87 mm	11	–	–	7.6
August	25°C	19°C	76 mm	10	–	–	7.8
September	21°C	16°C	84 mm	9	–	–	7.7
October	15°C	10°C	92 mm	12	–	–	6.2
November	8°C	4°C	82 mm	11	–	–	5.4
December	3°C	-1°C	78 mm	12	–	–	4.3