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Canada weather

Weather in Duncan for September 2026

Your guide to Duncan weather in September - trends and predictions

    Temperatures

  • So far, September 2026 in Duncan is slightly warmer than the historical average by 1.8 °C.

  • The forecast for the next days in Duncan predicts temperatures to be around 20 °C, close to the historical average.

  • In general, the average temperature in Duncan at the beginning of September is 20.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.9 °C by the end of September.

    • Rain 🌧️

  • The climate of Duncan in September is notably wet, with an average of 12 rainy days, and a total of 55.6 mm of precipitation.

    • More

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

Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/12°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
82 %
Avg humidity

Duncan Weather September

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

Temperatures trend during September in Duncan

See the weather trend as well as the moving average line

September weather in Duncan day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 21° /13° 0 mm 6
2 Sept. Cloudy
Cloudy
 20° /13° 1.8 mm 4
3 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 0.5 mm 4
4 Sept. Mist
Mist
 19° /12° 0 mm 4
5 Sept. Sunny
Sunny
 22° /12° 0 mm 6
6 Sept. Sunny
Sunny
 21° /12° 0 mm 5
7 Sept. Sunny
Sunny
 20° /13° 11.9 mm 5
8 Sept. Sunny
Sunny
 20° /12° 0 mm 5
9 Sept. Fog
Fog
 19° /12° 0 mm 4
10 Sept. Overcast
Overcast
 19° /12° 0 mm 5
11 Sept. Overcast
Overcast
 17° /11° 0.6 mm 3
12 Sept. Overcast
Overcast
 22° /12° 0 mm 3.4
13 Sept. Sunny
Sunny
 21° /11° 0 mm 4.8
14 Sept. Partly cloudy
Partly cloudy
 16° /10° 0 mm 4.1
15 Sept. Sunny
Sunny
 18° /11° 0.1 mm 5
16 Sept. Sunny
Sunny
 19° /11° 0 mm 5
17 Sept. Sunny
Sunny
 21° /12° 0 mm 6
18 Sept. Sunny
Sunny
 21° /13° 0 mm 6
19 Sept. Sunny
Sunny
 22° /13° 0 mm 6
20 Sept. Sunny
Sunny
 18° /13° 0 mm 5
21 Sept. Overcast
Overcast
 19° /12° 0 mm 5
22 Sept. Sunny
Sunny
 20° /13° 0 mm 5
23 Sept. Sunny
Sunny
 21° /13° 0 mm 6
24 Sept. Sunny
Sunny
 17° /12° 0 mm 5
25 Sept. Sunny
Sunny
 18° /11° 0 mm 5
26 Sept. Light drizzle
Light drizzle
 14° /10° 3.5 mm 3
27 Sept. Light drizzle
Light drizzle
 14° /11° 3.5 mm 4
28 Sept. Overcast
Overcast
 14° /10° 0.8 mm 3
29 Sept. Cloudy
Cloudy
 14° /9° 3.1 mm 4
30 Sept. Sunny
Sunny
 13° /9° 1.1 mm 4
Next
Important Notice
Our weather forecast for Duncan 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 Duncan forecast closer to your planned date for the most up-to-date weather information.
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Duncan in September - FAQ

What are the expected maximum and minimum temperatures in Duncan during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Duncan during September?
Moderate rainfall is anticipated in Duncan during September, with a total of 55.6 mm spread over approximately 12 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Duncan during September?
The average wind speed in Duncan during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Duncan

Explore the daily rainfall trends and prepare for Duncans September weather 💧
Typically, Duncan has 12 rainy days in September with a total of 55.6 mm of rainfall.

UV exposure in Duncan during September

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

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Location coordinates Where is Duncan?

Get accurate weather forecasts for Duncan, located at latitude 48.783 and longitude -123.703. Stay updated with localized weather information tailored for Duncan.

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