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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

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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

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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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