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Weather in Clark County for September 2025

Your guide to Clark County weather in September - trends and predictions
  • In general, the average temperature in Clark County at the beginning of September is 27.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.6 °F by the end of September.

  • Clark 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
23°/11°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
66 %
Avg humidity

Clark County in September average weather

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Temperatures trend during September in Clark 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
29° /15° 0.1 mm 7
Sept. 2 Cloudy
Cloudy
26° /14° 0.2 mm 6
Sept. 3 Patchy rain possible
Patchy rain possible
24° /14° 1.1 mm 5
Sept. 4 Overcast
Overcast
25° /12° 0.8 mm 6
Sept. 5 Mist
Mist
30° /12° 0 mm 7
Sept. 6 Partly cloudy
Partly cloudy
29° /13° 0 mm 7
Sept. 7 Cloudy
Cloudy
28° /14° 0 mm 6
Sept. 8 Overcast
Overcast
28° /13° 0 mm 7
Sept. 9 Mist
Mist
28° /12° 0 mm 7
Sept. 10 Sunny
Sunny
26° /12° 0 mm 7
Sept. 11 Overcast
Overcast
21° /12° 5.2 mm 5
Sept. 12 Cloudy
Cloudy
22° /11° 0.3 mm 5
Sept. 13 Overcast
Overcast
23° /10° 0 mm 6
Sept. 14 Sunny
Sunny
27° /11° 0.1 mm 7
Sept. 15 Sunny
Sunny
28° /11° 0 mm 7
Sept. 16 Sunny
Sunny
27° /10° 0 mm 7
Sept. 17 Overcast
Overcast
20° /10° 10.3 mm 5
Sept. 18 Overcast
Overcast
21° /11° 0 mm 5
Sept. 19 Overcast
Overcast
20° /11° 0 mm 5
Sept. 20 Light rain shower
Light rain shower
20° /10° 0.6 mm 5
Sept. 21 Partly cloudy
Partly cloudy
24° /8° 0 mm 7
Sept. 22 Sunny
Sunny
24° /11° 0 mm 7
Sept. 23 Light rain shower
Light rain shower
23° /13° 1.7 mm 5
Sept. 24 Light drizzle
Light drizzle
25° /13° 2.9 mm 6
Sept. 25 Light rain shower
Light rain shower
21° /14° 10.6 mm 5
Sept. 26 Light rain shower
Light rain shower
20° /11° 5.6 mm 5
Sept. 27 Light rain shower
Light rain shower
19° /13° 7.2 mm 5
Sept. 28 Light rain shower
Light rain shower
19° /11° 0.8 mm 5
Sept. 29 Overcast
Overcast
19° /8° 0 mm 4
Sept. 30 Sunny
Sunny
21° /7° 0 mm 6
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Important Notice
Our weather forecast for Clark 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 Clark County forecast closer to your planned date for the most up-to-date weather information.

Clark County in September - FAQ

What are the expected maximum and minimum temperatures in Clark County during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Clark County during September?
Moderate rainfall is anticipated in Clark County during September, with a total of 58.7 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Clark County during September?
The average wind speed in Clark County during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Clark County

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

UV exposure in Clark 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 Clark County?

Get accurate weather forecasts for Clark County, located at latitude 45.639 and longitude -122.661. Stay updated with localized weather information tailored for Clark County.

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