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Weather in Markham for September 2026

Your guide to Markham weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Markham has been nearly identical to the historical average, with a temperature of 24.4 °C (showing only a slight deviation of 0.1 °C).

  • Expect cooler weather in the next days in Markham with the forecast suggesting a temperature of 21.2 °C, lower than the historical average.

  • In general, the average temperature in Markham at the beginning of September is 25 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21 °C by the end of September.

    • Rain 🌧️

  • Markham experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 73.9 mm.

    • More

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

Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/13°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Markham Weather September

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

Temperatures trend during September in Markham

See the weather trend as well as the moving average line

September weather in Markham day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 26° /14° 0.2 mm 6
2 Sept. Mist
Mist
 24° /14° 21.1 mm 5
3 Sept. Partly cloudy
Partly cloudy
 28° /14° 0 mm 7
4 Sept. Sunny
Sunny
 26° /15° 6 mm 7
5 Sept. Sunny
Sunny
 26° /15° 0 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 25° /15° 2.4 mm 6
7 Sept. Overcast
Overcast
 20° /13° 2.6 mm 4
8 Sept. Overcast
Overcast
 22° /10° 0 mm 4
9 Sept. Overcast
Overcast
 22° /12° 4 mm 4
10 Sept. Overcast
Overcast
 23° /13° 0.3 mm 6
11 Sept. Sunny
Sunny
 25° /11° 0 mm 6
12 Sept. Overcast
Overcast
 23° /17° 0 mm 6
13 Sept. Patchy rain possible
Patchy rain possible
 26° /17° 0.8 mm 5.6
14 Sept. Sunny
Sunny
 20° /12° 0 mm 5.6
15 Sept. Overcast
Overcast
 20° /15° 0.6 mm 4
16 Sept. Patchy rain possible
Patchy rain possible
 23° /17° 3 mm 5
17 Sept. Overcast
Overcast
 17° /15° 0.1 mm 4
18 Sept. Sunny
Sunny
 19° /13° 0 mm 5
19 Sept. Sunny
Sunny
 21° /12° 0 mm 6
20 Sept. Sunny
Sunny
 21° /14° 0 mm 6
21 Sept. Sunny
Sunny
 20° /15° 0 mm 6
22 Sept. Overcast
Overcast
 19° /15° 0.5 mm 4
23 Sept. Overcast
Overcast
 20° /13° 0.8 mm 5
24 Sept. Sunny
Sunny
 23° /16° 0 mm 6
25 Sept. Overcast
Overcast
 24° /15° 19.5 mm 5
26 Sept. Overcast
Overcast
 21° /13° 0 mm 5
27 Sept. Fog
Fog
 19° /12° 0 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 0 mm 4
29 Sept. Mist
Mist
 21° /12° 0 mm 5
30 Sept. Mist
Mist
 20° /13° 0 mm 5
Next
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.
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Markham in September - FAQ

What are the expected maximum and minimum temperatures in Markham during September?
Enjoy moderate daytime temperatures of up to 23° 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?
Moderate rainfall is anticipated in Markham during September, with a total of 73.9 mm spread over approximately 8 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Markham during September?
The average wind speed in Markham during September is 15 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 💧
Typically, Markham has 8 rainy days in September with a total of 73.9 mm of rainfall.

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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