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Weather in Markham for September 2025

Your guide to Markham weather in September - trends and predictions
  • In general, the average temperature in Markham at the beginning of September is 26.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °C by the end of September.

  • With an average of 5 rainy days, Markham experiences minimal rainfall in September, ensuring that most days remain pleasantly dry.

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Average dry days
25
Dry days
Average rainy days
5
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/13°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
67 %
Avg humidity

Markham in September average weather

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Temperatures trend during September in Markham

See the weather trend as well as the moving average line

September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
24° /13° 0.2 mm 6
2 Sept. Mist
Mist
23° /12° 0.5 mm 6
3 Sept. Partly cloudy
Partly cloudy
29° /14° 0 mm 7
4 Sept. Cloudy
Cloudy
30° /17° 0 mm 7
5 Sept. Partly cloudy
Partly cloudy
30° /18° 0 mm 8
6 Sept. Patchy rain possible
Patchy rain possible
29° /19° 4.7 mm 6
7 Sept. Light rain shower
Light rain shower
20° /13° 5.1 mm 5
8 Sept. Overcast
Overcast
21° /10° 0 mm 5
9 Sept. Overcast
Overcast
22° /10° 1.9 mm 5
10 Sept. Overcast
Overcast
22° /14° 0 mm 6
11 Sept. Overcast
Overcast
24° /15° 0.1 mm 5
12 Sept. Fog
Fog
24° /14° 1 mm 6
13 Sept. Overcast
Overcast
22° /13° 0 mm 6
14 Sept. Cloudy
Cloudy
23° /13° 0 mm 6
15 Sept. Partly cloudy
Partly cloudy
25° /12° 0 mm 7
16 Sept. Overcast
Overcast
25° /14° 0 mm 6
17 Sept. Patchy light rain with thunder
Patchy light rain with thunder
23° /14° 1 mm 5
18 Sept. Mist
Mist
23° /12° 0 mm 5
19 Sept. Sunny
Sunny
24° /10° 0 mm 6
20 Sept. Partly cloudy
Partly cloudy
23° /9° 0 mm 6
21 Sept. Mist
Mist
24° /15° 0 mm 6
22 Sept. Mist
Mist
22° /14° 4.5 mm 5
23 Sept. Mist
Mist
21° /14° 14.4 mm 5
24 Sept. Sunny
Sunny
21° /13° 0 mm 5
25 Sept. Overcast
Overcast
23° /14° 21.3 mm 5
26 Sept. Overcast
Overcast
22° /13° 0 mm 6
27 Sept. Overcast
Overcast
19° /11° 0 mm 5
28 Sept. Patchy rain possible
Patchy rain possible
18° /13° 0 mm 4
29 Sept. Mist
Mist
20° /15° 0 mm 5
30 Sept. Mist
Mist
20° /14° 0 mm 5
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Important Notice
Our weather forecast for Markham 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 Markham forecast closer to your planned date for the most up-to-date weather information.

Markham in September - FAQ

What are the expected maximum and minimum temperatures in Markham during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Markham during September?
Expect minimal rainfall in Markham during September, with a total of 13.8 mm over approximately 5 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Markham during September?
The average wind speed in Markham during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Markham

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

UV exposure in Markham during September

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

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Location coordinates Where is Markham?

Get accurate weather forecasts for Markham, located at latitude 43.867 and longitude -79.266. Stay updated with localized weather information tailored for Markham.

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