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Marathon County (Wausau)
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United States weather

Weather in Marathon County, Wisconsin for September 2026

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

    Temperatures

  • Until now, September 2026 in Marathon County has been nearly identical to the historical average, with a temperature of 21.7 °F (showing only a slight deviation of 0.2 °F).

  • The forecast for the next days in Marathon County predicts a temperature of 15.6 °F, which is cooler than the historical average.

  • In general, the average temperature in Marathon County at the beginning of September is 22.1 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 19.3 °F by the end of September.

    • Rain 🌧️

  • Marathon County experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 78 mm.

    • More

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Average dry days
20
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/11°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Marathon County Weather September

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

Temperatures trend during September in Marathon County

See the weather trend as well as the moving average line

September weather in Marathon County day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
 26° /13° 0 mm 6
Sept. 2 Sunny
Sunny
 25° /12° 5.4 mm 4
Sept. 3 Sunny
Sunny
 22° /11° 22.5 mm 4
Sept. 4 Sunny
Sunny
 22° /10° 4.1 mm 4
Sept. 5 Moderate rain at times
Moderate rain at times
 20° /12° 7 mm 5
Sept. 6 Patchy rain possible
Patchy rain possible
 20° /9° 0.2 mm 5
Sept. 7 Sunny
Sunny
 20° /7° 0 mm 4
Sept. 8 Partly cloudy
Partly cloudy
 21° /7° 96.6 mm 4
Sept. 9 Sunny
Sunny
 23° /13° 5.7 mm 5
Sept. 10 Patchy rain possible
Patchy rain possible
 24° /11° 13 mm 6
Sept. 11 Cloudy
Cloudy
 25° /12° 0 mm 6
Sept. 12 Sunny
Sunny
 23° /14° 0.1 mm 4
Sept. 13 Overcast
Overcast
 22° /13° 3.2 mm 5
Sept. 14 Cloudy
Cloudy
 24° /11° 8.9 mm 5
Sept. 15 Overcast
Overcast
 24° /14° 2.3 mm 4
Sept. 16 Sunny
Sunny
 25° /13° 0 mm 5
Sept. 17 Partly cloudy
Partly cloudy
 25° /13° 1.5 mm 5
Sept. 18 Overcast
Overcast
 22° /14° 2.7 mm 4
Sept. 19 Cloudy
Cloudy
 19° /12° 2.1 mm 4
Sept. 20 Overcast
Overcast
 20° /12° 3.2 mm 3
Sept. 21 Partly cloudy
Partly cloudy
 20° /11° 1.6 mm 4
Sept. 22 Patchy rain possible
Patchy rain possible
 18° /10° 11.5 mm 4
Sept. 23 Sunny
Sunny
 18° /9° 0.4 mm 4
Sept. 24 Overcast
Overcast
 19° /8° 0 mm 3
Sept. 25 Overcast
Overcast
 20° /9° 0.4 mm 4
Sept. 26 Overcast
Overcast
 20° /9° 0 mm 5
Sept. 27 Overcast
Overcast
 18° /11° 0 mm 2.9
Sept. 28 Sunny
Sunny
 21° /13° 0 mm 5
Sept. 29 Overcast
Overcast
 18° /13° 17.2 mm 3
Sept. 30 Overcast
Overcast
 19° /14° 8 mm 1.5
Next
Important Notice
Our weather forecast for Marathon 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 Marathon County forecast closer to your planned date for the most up-to-date weather information.
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Marathon County in September - FAQ

What are the expected maximum and minimum temperatures in Marathon County during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Marathon County during September?
Moderate rainfall is anticipated in Marathon County during September, with a total of 78 mm spread over approximately 10 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Marathon County during September?
The average wind speed in Marathon County during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Marathon County

Explore the daily rainfall trends and prepare for Marathon Countys September weather 💧
Typically, Marathon County has 10 rainy days in September with a total of 78 mm of rainfall.

UV exposure in Marathon County during September

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

Get accurate weather forecasts for Marathon County, located at latitude 44.959 and longitude -89.63. Stay updated with localized weather information tailored for Marathon County.

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