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Weather in Marion County for September 2025

Your guide to Marion County weather in September - trends and predictions
  • In general, the average temperature in Marion County at the beginning of September is 28.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.3 °F by the end of September.

  • Marion County sees moderate rainfall in September, averaging 10 rainy days.

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Average dry days
20
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/10°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
68 %
Avg humidity

Marion County in September average weather

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Temperatures trend during September in Marion County

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
Sept. 1 Fog
Fog
30° /14° 0.2 mm 7
Sept. 2 Thundery outbreaks possible
Thundery outbreaks possible
27° /13° 1 mm 6
Sept. 3 Mist
Mist
27° /11° 0.1 mm 6
Sept. 4 Mist
Mist
28° /10° 0.4 mm 7
Sept. 5 Mist
Mist
30° /11° 0 mm 7
Sept. 6 Partly cloudy
Partly cloudy
30° /13° 0 mm 8
Sept. 7 Mist
Mist
28° /12° 0 mm 7
Sept. 8 Sunny
Sunny
29° /11° 0 mm 8
Sept. 9 Mist
Mist
28° /11° 0 mm 7
Sept. 10 Partly cloudy
Partly cloudy
27° /10° 0 mm 7
Sept. 11 Overcast
Overcast
21° /11° 8.9 mm 5
Sept. 12 Mist
Mist
23° /10° 0.2 mm 6
Sept. 13 Mist
Mist
24° /10° 0 mm 6
Sept. 14 Mist
Mist
27° /10° 0 mm 6
Sept. 15 Sunny
Sunny
28° /10° 0 mm 7
Sept. 16 Partly cloudy
Partly cloudy
28° /10° 0 mm 7
Sept. 17 Overcast
Overcast
21° /10° 7.3 mm 5
Sept. 18 Overcast
Overcast
22° /11° 1.5 mm 5
Sept. 19 Mist
Mist
22° /9° 0 mm 5
Sept. 20 Light rain shower
Light rain shower
21° /9° 0.2 mm 5
Sept. 21 Partly cloudy
Partly cloudy
25° /6° 0 mm 7
Sept. 22 Sunny
Sunny
25° /9° 0 mm 6
Sept. 23 Patchy rain possible
Patchy rain possible
23° /10° 0.2 mm 5
Sept. 24 Light drizzle
Light drizzle
25° /11° 1.9 mm 6
Sept. 25 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
17° /12° 4.3 mm 4
Sept. 26 Light rain shower
Light rain shower
21° /10° 3.6 mm 5
Sept. 27 Light rain shower
Light rain shower
19° /10° 7.9 mm 5
Sept. 28 Patchy light rain
Patchy light rain
20° /8° 1 mm 5
Sept. 29 Patchy rain possible
Patchy rain possible
18° /8° 0 mm 5
Sept. 30 Sunny
Sunny
22° /5° 0 mm 6
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Important Notice
Our weather forecast for Marion 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 Marion County forecast closer to your planned date for the most up-to-date weather information.

Marion County in September - FAQ

What are the expected maximum and minimum temperatures in Marion County during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Marion County during September?
In September, Marion County can expect light to moderate rainfall, totaling 42 mm across approximately 10 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Marion County during September?
The average wind speed in Marion County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Marion County

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

UV exposure in Marion County during September

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

Get accurate weather forecasts for Marion County, located at latitude 44.943 and longitude -123.035. Stay updated with localized weather information tailored for Marion County.

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