Brockville weather in September 2025

The temperatures in Brockville 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 Brockville 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 Brockville in September 2025.

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

Temperatures

21° / 11°

Rainy Days

Snowy Days

Dry Days

Rainfall

103

Sun Hours

7.2

Hrs

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

Explore the weather in Brockville in other months

Brockville annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	-5° / -12°	5	6	21	91 mm	Awful	Brockville in January
February	-4° / -11°	5	4	20	104 mm	Awful	Brockville in February
March	3° / -5°	8	8	15	86 mm	Awful	Brockville in March
April	10° / 2°	10	15	5	136 mm	Awful	Brockville in April
May	18° / 8°	8	22	1	133 mm	Ok	Brockville in May
June	22° / 12°	7	23	0	131 mm	Ok	Brockville in June
July	26° / 15°	7	24	0	130 mm	Good	Brockville in July
August	25° / 15°	6	25	0	138 mm	Perfect	Brockville in August
September	21° / 11°	5	25	0	103 mm	Good	Brockville in September
October	14° / 6°	8	22	1	125 mm	Ok	Brockville in October
November	6° / -1°	6	17	8	78 mm	Awful	Brockville in November
December	-1° / -6°	8	7	17	105 mm	Awful	Brockville in December

Temperatures in Brockville in September

Rain in Brockville in September

Weather in Brockville in September - FAQ

What is the average temperature in Brockville in September?

The average temperature in Brockville in September is 11/21° C.

What is the chance of rain in Brockville in September?

On average, there are 5 rainy days in Brockville during September.

Weather wise, is September a good time to visit Brockville?

The weather in Brockville in September is good.

Can it snow in Brockville in September?

On average, there are 0 snowy days in Brockville in September.

More about the weather in Brockville