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Canada weather

Weather in Brockville for September 2026

Your guide to Brockville weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Brockville at the beginning of September is 25.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.3 °C by the end of September.

    • Rain 🌧️

  • Brockville experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 117.4 mm.

    • More

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Average dry days
21
Dry days
Average rainy days
9
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/11°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Brockville Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
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
Cloudy
21°
27
Mist
21°
28
Mist
22°
29
Overcast
21°
30
Overcast
23°

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. Cloudy
Cloudy
 21° /12° 16.1 mm 5
27 Sept. Mist
Mist
 21° /7° 0 mm 5
28 Sept. Mist
Mist
 22° /10° 0 mm 5
29 Sept. Overcast
Overcast
 21° /12° 0 mm 5
30 Sept. Overcast
Overcast
 23° /10° 0 mm 5
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?

Significant rainfall exceeding 117.4 mm is expected in Brockville during September, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Brockville during September?

The average wind speed in Brockville during September is 14 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 💧
Typically, Brockville has 9 rainy days in September with a total of 117.4 mm of rainfall.

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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