Guelph weather in September 2025

The temperatures in Guelph in September are comfortable with low of 11°C and and high up to 21°C.

You can expect about 3 to 8 days of rain in Guelph during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Guelph in September 2025.

If you’re planning to visit Guelph in the near future, we highly recommend that you review the 14 day weather forecast for Guelph before you arrive.

Temperatures

21° / 11°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

10.2

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
	1 23° /11°	2 24° /11°	3 27° /13°	4 27° /13°	5 27° /15°	6 26° /15°
7 23° /11°	8 22° /12°	9 24° /11°	10 24° /12°	11 23° /13°	12 24° /15°	13 21° /12°
14 24° /10°	15 23° /12°	16 25° /11°	17 25° /13°	18 26° /13°	19 23° /12°	20 25° /10°
21 21° /14°	22 19° /11°	23 17° /9°	24 19° /11°	25 20° /11°	26 18° /10°	27 18° /9°
28 16° /10°	29 19° /10°	30 19° /9°

Explore the weather in Guelph in other months

Guelph annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	-4° / -10°	8	4	22	105 mm	Awful	Guelph in January
February	-3° / -9°	5	3	20	93 mm	Awful	Guelph in February
March	3° / -4°	8	9	14	108 mm	Awful	Guelph in March
April	10° / 1°	9	14	7	142 mm	Awful	Guelph in April
May	18° / 8°	8	22	1	132 mm	Ok	Guelph in May
June	22° / 12°	8	22	0	138 mm	Ok	Guelph in June
July	25° / 15°	9	22	0	154 mm	Good	Guelph in July
August	24° / 15°	7	24	0	133 mm	Good	Guelph in August
September	21° / 11°	5	25	0	93 mm	Good	Guelph in September
October	13° / 6°	9	20	2	134 mm	Awful	Guelph in October
November	6° / 0°	8	11	11	95 mm	Awful	Guelph in November
December	0° / -4°	8	5	19	102 mm	Awful	Guelph in December