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Weather in Oakville for September 2025

Your guide to Oakville weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Oakville is cooler than usual, with temperatures averaging 21 °C, this is -2.8 °C below the typical seasonal average.

  • Expect cooler weather in the next days in Oakville with the forecast suggesting a temperature of 21.8 °C, lower than the historical average.

  • In general, the average temperature in Oakville at the beginning of September is 24.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.9 °C by the end of September.

    • Rain 🌧️

  • Oakville experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 44.8 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/15°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Oakville Weather September

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

Temperatures trend during September in Oakville

See the weather trend as well as the moving average line

September weather in Oakville day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 24° /14° 0.1 mm 6
2 Sept. Fog
Fog
 23° /13° 0.3 mm 5
3 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 27° /14° 0.4 mm 7
4 Sept. Partly cloudy
Partly cloudy
 27° /16° 4.5 mm 6
5 Sept. Cloudy
Cloudy
 28° /15° 0 mm 6
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 25° /17° 4.7 mm 6
7 Sept. Light rain shower
Light rain shower
 20° /14° 2.4 mm 4
8 Sept. Overcast
Overcast
 21° /12° 0 mm 5
9 Sept. Overcast
Overcast
 22° /12° 0.5 mm 5
10 Sept. Overcast
Overcast
 21° /13° 0 mm 5
11 Sept. Cloudy
Cloudy
 24° /15° 0 mm 5
12 Sept. Partly cloudy
Partly cloudy
 23° /15° 1.7 mm 6
13 Sept. Overcast
Overcast
 22° /14° 0 mm 5
14 Sept. Partly cloudy
Partly cloudy
 21° /15° 0 mm 1.2
15 Sept. Fog
Fog
 18° /15° 0 mm 1.3
16 Sept. Partly cloudy
Partly cloudy
 19° /14° 0 mm 1.3
17 Sept. Sunny
Sunny
 24° /14° 0 mm 1.3
18 Sept. Sunny
Sunny
 29° /16° 0 mm 0
19 Sept. Partly cloudy
Partly cloudy
 20° /17° 0 mm 5
20 Sept. Sunny
Sunny
 18° /16° 0 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 26° /16° 0.9 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 0.4 mm 4
23 Sept. Sunny
Sunny
 22° /12° 0 mm 5
24 Sept. Overcast
Overcast
 18° /14° 0 mm 4
25 Sept. Sunny
Sunny
 26° /13° 0 mm 5
26 Sept. Sunny
Sunny
 19° /15° 0 mm 5
27 Sept. Sunny
Sunny
 25° /16° 0 mm 5
28 Sept. Patchy rain possible
Patchy rain possible
 18° /15° 3 mm 4
29 Sept. Overcast
Overcast
 20° /16° 0 mm 5
30 Sept. Mist
Mist
 20° /15° 0 mm 5
Next
Important Notice
Our weather forecast for Oakville 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 Oakville forecast closer to your planned date for the most up-to-date weather information.
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Oakville in September - FAQ

What are the expected maximum and minimum temperatures in Oakville during September?
During September, expect a variety of temperatures with highs around 22° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Oakville during September?
In September, Oakville can expect light to moderate rainfall, totaling 44.8 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Oakville during September?
The average wind speed in Oakville during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Oakville

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

UV exposure in Oakville during September

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

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Location coordinates Where is Oakville?

Get accurate weather forecasts for Oakville, located at latitude 43.45 and longitude -79.683. Stay updated with localized weather information tailored for Oakville.

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