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United States weather

Weather in Cass County, North Dakota for September 2025

Your guide to Cass County weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Cass County is cooler than usual, with temperatures averaging 21.2 °F, this is -3.4 °F below the typical seasonal average.

  • The forecast for the upcoming days in Cass County predicts a temperature of 27.4 °F, which is slightly above the historical average.

  • In general, the average temperature in Cass County at the beginning of September is 21.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 30.1 °F by the end of September.

    • Rain 🌧️

  • With an average of 5 rainy days, Cass County experiences minimal rainfall in September.

    • More

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Average dry days
25
Dry days
Average rainy days
5
Rainy days
Average snowy days
0
Snow days
Average temperatures
27°/15°
Temperatures
Average wind speed
25 km/h
Avg max wind
Average humidity
53 %
Avg humidity

Cass County Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
24°
2
Sunny
25°
3
Sunny
23°
4
Moderate rain at times
21°
5
Partly cloudy
18°
6
Patchy rain possible
19°
7
Sunny
22°
8
Sunny
26°
9
Sunny
29°
10
Partly cloudy
31°
11
Sunny
27°
12
Sunny
27°
13
Partly cloudy
28°
14
Sunny
31°
15
Moderate rain
27°
16
Partly cloudy
30°
17
Mist
27°
18
Patchy rain possible
18°
19
Patchy rain possible
20°
20
Patchy rain possible
23°
21
Cloudy
26°
22
Sunny
27°
23
Sunny
28°
24
Patchy rain possible
32°
25
Sunny
31°
26
Sunny
26°
27
Patchy rain possible
34°
28
Sunny
34°
29
Sunny
30°
30
Cloudy
24°

Temperatures trend during September in Cass County

See the weather trend as well as the moving average line

September weather in Cass County day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Overcast
Overcast
 24° /11° 0 mm 6
Sept. 2 Sunny
Sunny
 25° /13° 6.3 mm 6
Sept. 3 Sunny
Sunny
 23° /13° 0 mm 6
Sept. 4 Moderate rain at times
Moderate rain at times
 21° /11° 11.3 mm 5
Sept. 5 Partly cloudy
Partly cloudy
 18° /11° 0.1 mm 5
Sept. 6 Patchy rain possible
Patchy rain possible
 19° /8° 0.1 mm 5
Sept. 7 Sunny
Sunny
 22° /8° 0 mm 6
Sept. 8 Sunny
Sunny
 26° /10° 0 mm 6
Sept. 9 Sunny
Sunny
 29° /14° 0 mm 7
Sept. 10 Partly cloudy
Partly cloudy
 31° /16° 0 mm 7
Sept. 11 Sunny
Sunny
 27° /14° 0 mm 6
Sept. 12 Sunny
Sunny
 27° /18° 6.2 mm 7
Sept. 13 Partly cloudy
Partly cloudy
 28° /19° 3.3 mm 7
Sept. 14 Sunny
Sunny
 31° /20° 0 mm 7
Sept. 15 Moderate rain
Moderate rain
 27° /19° 7.7 mm 1.2
Sept. 16 Partly cloudy
Partly cloudy
 30° /13° 0 mm 1.2
Sept. 17 Mist
Mist
 27° /15° 0 mm 1
Sept. 18 Patchy rain possible
Patchy rain possible
 18° /17° 3.7 mm 0.2
Sept. 19 Patchy rain possible
Patchy rain possible
 20° /15° 1.9 mm 0
Sept. 20 Patchy rain possible
Patchy rain possible
 23° /15° 0.5 mm 4
Sept. 21 Cloudy
Cloudy
 26° /15° 0 mm 4
Sept. 22 Sunny
Sunny
 27° /16° 0 mm 6
Sept. 23 Sunny
Sunny
 28° /14° 0 mm 6
Sept. 24 Patchy rain possible
Patchy rain possible
 32° /19° 0.4 mm 5
Sept. 25 Sunny
Sunny
 31° /20° 0 mm 7
Sept. 26 Sunny
Sunny
 26° /16° 0.1 mm 6
Sept. 27 Patchy rain possible
Patchy rain possible
 34° /15° 2.2 mm 5
Sept. 28 Sunny
Sunny
 34° /23° 0 mm 7
Sept. 29 Sunny
Sunny
 30° /13° 0 mm 8
Sept. 30 Cloudy
Cloudy
 24° /13° 0 mm 5
Next
Important Notice
Our weather forecast for Cass County 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 Cass County forecast closer to your planned date for the most up-to-date weather information.
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Cass County in September - FAQ

What are the expected maximum and minimum temperatures in Cass County during September?
During September, expect a variety of temperatures with highs around 27° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cass County during September?
Moderate rainfall is anticipated in Cass County during September, with a total of 63.3 mm spread over approximately 5 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Cass County during September?
The average wind speed in Cass County during September is 25 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Cass County

Explore the daily rainfall trends and prepare for Cass Countys September weather 💧

UV exposure in Cass County during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Fargo
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Location coordinates Where is Cass County?

Get accurate weather forecasts for Cass County, located at latitude 46.877 and longitude -96.79. Stay updated with localized weather information tailored for Cass County.

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