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

Best months for St. Charles: May, September, October, June.

Best time to visit

Year at a glance

Jan 5.2 Feb 5.7 Mar 6.2 Apr 7.3 May 7.7 Jun 7.5 Jul 6.9 Aug 7.5 Sep 7.7 Oct 7.7 Nov 6.8 Dec 5.7

Weather by month

Month	Avg high	Avg low	Rainfall	Rainy days	Humidity	Sunshine	Score
January	7°C	0°C	77 mm	9	–	–	5.2
February	9°C	0°C	71 mm	8	–	–	5.7
March	13°C	4°C	98 mm	10	–	–	6.2
April	19°C	10°C	84 mm	10	–	–	7.3
May	24°C	15°C	86 mm	10	–	–	7.7
June	28°C	20°C	90 mm	11	–	–	7.5
July	31°C	23°C	96 mm	13	–	–	6.9
August	29°C	22°C	93 mm	10	–	–	7.5
September	26°C	18°C	102 mm	9	–	–	7.7
October	20°C	12°C	87 mm	8	–	–	7.7
November	14°C	6°C	74 mm	8	–	–	6.8
December	9°C	2°C	85 mm	9	–	–	5.7