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Canada weather

Weather in Duncan for September 2025

Your guide to Duncan weather in September - trends and predictions

  • In general, the average temperature in Duncan at the beginning of September is 20.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14 °C by the end of September.

  • Duncan sees moderate rainfall in September, averaging 8 rainy days.

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Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/10°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Duncan in September average weather

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

See the weather trend as well as the moving average line

September weather day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 22° /13° 0 mm 6
2 Sept. Cloudy
Cloudy
 21° /13° 0 mm 5
3 Sept. Light drizzle
Light drizzle
 18° /13° 0.2 mm 4
4 Sept. Mist
Mist
 19° /11° 0 mm 5
5 Sept. Cloudy
Cloudy
 21° /12° 0 mm 5
6 Sept. Mist
Mist
 20° /12° 0 mm 5
7 Sept. Fog
Fog
 21° /12° 0 mm 5
8 Sept. Fog
Fog
 20° /12° 0 mm 5
9 Sept. Fog
Fog
 19° /11° 0 mm 5
10 Sept. Partly cloudy
Partly cloudy
 20° /12° 0 mm 5
11 Sept. Overcast
Overcast
 17° /11° 1.2 mm 4
12 Sept. Fog
Fog
 16° /11° 0 mm 4
13 Sept. Fog
Fog
 17° /11° 0.3 mm 4
14 Sept. Mist
Mist
 19° /11° 0.9 mm 5
15 Sept. Partly cloudy
Partly cloudy
 19° /10° 0 mm 5
16 Sept. Overcast
Overcast
 19° /10° 0 mm 5
17 Sept. Cloudy
Cloudy
 16° /12° 1.6 mm 4
18 Sept. Overcast
Overcast
 16° /11° 0.1 mm 4
19 Sept. Overcast
Overcast
 13° /11° 0 mm 3
20 Sept. Patchy rain possible
Patchy rain possible
 15° /10° 0.8 mm 4
21 Sept. Overcast
Overcast
 16° /9° 0 mm 4
22 Sept. Sunny
Sunny
 18° /9° 0 mm 5
23 Sept. Light rain
Light rain
 16° /11° 2.7 mm 4
24 Sept. Light rain
Light rain
 15° /10° 8.5 mm 4
25 Sept. Light rain shower
Light rain shower
 16° /11° 5.8 mm 4
26 Sept. Light drizzle
Light drizzle
 13° /10° 5.2 mm 3
27 Sept. Light drizzle
Light drizzle
 14° /10° 5.3 mm 4
28 Sept. Light drizzle
Light drizzle
 14° /9° 1.1 mm 4
29 Sept. Cloudy
Cloudy
 13° /7° 0 mm 4
30 Sept. Sunny
Sunny
 13° /7° 0 mm 4
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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.

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 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Duncan during September?
In September, Duncan can expect light to moderate rainfall, totaling 47 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
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 💧

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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