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Canada weather

Weather in Brockville for September 2025

Your guide to Brockville weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Brockville is slightly cooler than the historical average by -0.8 °C.

  • The forecast for the next days in Brockville predicts a temperature of 21.4 °C, which is cooler than the historical average.

  • In general, the average temperature in Brockville at the beginning of September is 25.1 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 22.9 °C by the end of September.

    • Rain 🌧️

  • Brockville experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 66.6 mm.

    • More

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Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/11°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Brockville Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
26°
2
Mist
22°
3
Fog
26°
4
Mist
27°
5
Cloudy
27°
6
Fog
26°
7
Light rain shower
22°
8
Light rain shower
19°
9
Cloudy
23°
10
Light rain shower
22°
11
Fog
24°
12
Mist
24°
13
Fog
22°
14
Mist
22°
15
Mist
24°
16
Overcast
25°
17
Patchy rain possible
24°
18
Light rain shower
24°
19
Thundery outbreaks possible
21°
20
Overcast
22°
21
Mist
24°
22
Mist
23°
23
Overcast
21°
24
Fog
22°
25
Heavy rain
19°
26
Overcast
23°
27
Fog
22°
28
Mist
24°
29
Sunny
26°
30
Sunny
24°

Temperatures trend during September in Brockville

See the weather trend as well as the moving average line

September weather in Brockville day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 26° /10° 1.3 mm 6
2 Sept. Mist
Mist
 22° /11° 0.5 mm 5
3 Sept. Fog
Fog
 26° /11° 0 mm 6
4 Sept. Mist
Mist
 27° /14° 13.6 mm 6
5 Sept. Cloudy
Cloudy
 27° /12° 0 mm 6
6 Sept. Fog
Fog
 26° /14° 4.4 mm 6
7 Sept. Light rain shower
Light rain shower
 22° /12° 4.7 mm 5
8 Sept. Light rain shower
Light rain shower
 19° /10° 0.3 mm 4
9 Sept. Cloudy
Cloudy
 23° /8° 1.4 mm 5
10 Sept. Light rain shower
Light rain shower
 22° /9° 1.1 mm 6
11 Sept. Fog
Fog
 24° /10° 0 mm 6
12 Sept. Mist
Mist
 24° /12° 0.2 mm 6
13 Sept. Fog
Fog
 22° /12° 0 mm 5
14 Sept. Mist
Mist
 22° /12° 0.4 mm 5
15 Sept. Mist
Mist
 24° /10° 0 mm 5
16 Sept. Overcast
Overcast
 25° /10° 0 mm 6
17 Sept. Patchy rain possible
Patchy rain possible
 24° /12° 0.1 mm 6
18 Sept. Light rain shower
Light rain shower
 24° /12° 9.3 mm 5
19 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 21° /10° 0 mm 4
20 Sept. Overcast
Overcast
 22° /6° 0 mm 6
21 Sept. Mist
Mist
 24° /7° 0 mm 5
22 Sept. Mist
Mist
 23° /9° 0.3 mm 5
23 Sept. Overcast
Overcast
 21° /13° 0 mm 5
24 Sept. Fog
Fog
 22° /13° 0 mm 5
25 Sept. Heavy rain
Heavy rain
 19° /12° 63.8 mm 5
26 Sept. Overcast
Overcast
 23° /16° 0 mm 0.9
27 Sept. Fog
Fog
 22° /13° 0 mm 1
28 Sept. Mist
Mist
 24° /15° 0 mm 1
29 Sept. Sunny
Sunny
 26° /9° 0 mm 1.1
30 Sept. Sunny
Sunny
 24° /12° 0 mm 0
Next
Important Notice
Our weather forecast for Brockville in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Brockville forecast closer to your planned date for the most up-to-date weather information.
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Brockville in September - FAQ

What are the expected maximum and minimum temperatures in Brockville during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Brockville during September?
Moderate rainfall is anticipated in Brockville during September, with a total of 66.6 mm spread over approximately 6 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Brockville during September?
The average wind speed in Brockville during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Brockville

Explore the daily rainfall trends and prepare for Brockvilles September weather 💧

UV exposure in Brockville during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Brockville?

Get accurate weather forecasts for Brockville, located at latitude 44.591 and longitude -75.687. Stay updated with localized weather information tailored for Brockville.

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