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United States weather

Weather in Des Moines, Iowa for September 2026

Your guide to Des Moines weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Des Moines at the beginning of September is 28.1 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 28 °C by the end of September.

    • Rain 🌧️

  • The climate of Des Moines in September is notably wet, with an average of 11 rainy days, and a total of 128.5 mm of precipitation.

    • More

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

Average dry days
19
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/14°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
63 %
Avg humidity

Des Moines Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
29°
2
Sunny
30°
3
Sunny
29°
4
Mist
30°
5
Thundery outbreaks possible
31°
6
Overcast
24°
7
Sunny
24°
8
Cloudy
28°
9
Partly cloudy
31°
10
Overcast
30°
11
Heavy rain
30°
12
Sunny
32°
13
Partly cloudy
31°
14
Partly cloudy
32°
15
Partly cloudy
31°
16
Fog
30°
17
Cloudy
28°
18
Mist
29°
19
Thundery outbreaks possible
27°
20
Thundery outbreaks possible
26°
21
Partly cloudy
28°
22
Light rain shower
25°
23
Patchy rain possible
25°
24
Fog
24°
25
Fog
27°
26
Sunny
28°
27
Fog
28°
28
Mist
28°
29
Partly cloudy
31°
30
Patchy light rain with thunder
30°

Temperatures trend during September in Des Moines

See the weather trend as well as the moving average line

September weather in Des Moines day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
 29° /13° 0 mm 7
Sept. 2 Sunny
Sunny
 30° /12° 0 mm 7
Sept. 3 Sunny
Sunny
 29° /13° 22.2 mm 7
Sept. 4 Mist
Mist
 30° /13° 0 mm 7
Sept. 5 Thundery outbreaks possible
Thundery outbreaks possible
 31° /17° 0.5 mm 7
Sept. 6 Overcast
Overcast
 24° /11° 0 mm 6
Sept. 7 Sunny
Sunny
 24° /7° 0 mm 6
Sept. 8 Cloudy
Cloudy
 28° /10° 0 mm 7
Sept. 9 Partly cloudy
Partly cloudy
 31° /12° 0 mm 8
Sept. 10 Overcast
Overcast
 30° /16° 0.4 mm 7
Sept. 11 Heavy rain
Heavy rain
 30° /16° 9 mm 7
Sept. 12 Sunny
Sunny
 32° /14° 0 mm 7
Sept. 13 Partly cloudy
Partly cloudy
 31° /16° 0 mm 7
Sept. 14 Partly cloudy
Partly cloudy
 32° /15° 0 mm 8
Sept. 15 Partly cloudy
Partly cloudy
 31° /17° 0 mm 7
Sept. 16 Fog
Fog
 30° /16° 1.6 mm 7
Sept. 17 Cloudy
Cloudy
 28° /14° 3.4 mm 6
Sept. 18 Mist
Mist
 29° /14° 10.7 mm 6
Sept. 19 Thundery outbreaks possible
Thundery outbreaks possible
 27° /17° 1.9 mm 6
Sept. 20 Thundery outbreaks possible
Thundery outbreaks possible
 26° /15° 45 mm 6
Sept. 21 Partly cloudy
Partly cloudy
 28° /15° 18.3 mm 6
Sept. 22 Light rain shower
Light rain shower
 25° /14° 11 mm 5
Sept. 23 Patchy rain possible
Patchy rain possible
 25° /13° 2.8 mm 6
Sept. 24 Fog
Fog
 24° /12° 0.3 mm 5
Sept. 25 Fog
Fog
 27° /12° 0 mm 6
Sept. 26 Sunny
Sunny
 28° /13° 0 mm 7
Sept. 27 Fog
Fog
 28° /12° 0 mm 7
Sept. 28 Mist
Mist
 28° /12° 0 mm 6
Sept. 29 Partly cloudy
Partly cloudy
 31° /15° 0 mm 7
Sept. 30 Patchy light rain with thunder
Patchy light rain with thunder
 30° /16° 1.4 mm 7
Next
Important Notice
Our weather forecast for Des Moines 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 Des Moines forecast closer to your planned date for the most up-to-date weather information.
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Des Moines in September - FAQ

What are the expected maximum and minimum temperatures in Des Moines during September?

Enjoy moderate daytime temperatures of up to 28° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Des Moines during September?

Significant rainfall exceeding 128.5 mm is expected in Des Moines during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Des Moines during September?

The average wind speed in Des Moines during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Des Moines

Explore the daily rainfall trends and prepare for Des Moiness September weather 💧
Typically, Des Moines has 11 rainy days in September with a total of 128.5 mm of rainfall.

UV exposure in Des Moines during September

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

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Location coordinates Where is Des Moines?

Get accurate weather forecasts for Des Moines, located at latitude 41.601 and longitude -93.609. Stay updated with localized weather information tailored for Des Moines.

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