Nez Perce County (Lewiston)
September
Weather in Nez Perce County, Idaho for September 2027
Your guide to Nez Perce County weather in September - trends and predictions
In general, the average temperature in Nez Perce County at the beginning of September is 30.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.9 °C by the end of September.
With an average of 5 rainy days, Nez Perce County experiences minimal rainfall in September.
Is September a good time to visit Nez Perce County? check out the best time to travel to Nez Perce County page.
✨ Is September a good time to visit Nez Perce County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
25
Dry days
5
Rainy days
0
Snow days
25°/12°
Temperatures
14 km/h
Avg max wind
47 %
Avg humidity
Nez Perce County Weather September
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Temperatures trend during September in Nez Perce County
See the weather trend as well as the moving average line
September weather in Nez Perce County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 35° /18° | 0.1 mm | 5 | |
| Sept. 2 |  Moderate rain | 31° /16° | 18.2 mm | 6 | |
| Sept. 3 |  Heavy rain | 29° /16° | 70.6 mm | 6 | |
| Sept. 4 | Moderate rain | 32° /15° | 10.4 mm | 6.6 | |
| Sept. 5 | Sunny | 29° /12° | 0 mm | 6.5 | |
| Sept. 6 |  Cloudy | 29° /13° | 0.4 mm | 5 | |
| Sept. 7 |  Overcast | 27° /15° | 0.9 mm | 4 | |
| Sept. 8 |  Thundery outbreaks possible | 28° /12° | 0 mm | 6 | |
| Sept. 9 | Overcast | 28° /13° | 0 mm | 6 | |
| Sept. 10 | Overcast | 28° /15° | 0 mm | 5 | |
| Sept. 11 |  Patchy rain possible | 22° /14° | 1.1 mm | 4 | |
| Sept. 12 |  Light rain | 23° /12° | 2.9 mm | 3 | |
| Sept. 13 | Light rain | 23° /11° | 6.2 mm | 5 | |
| Sept. 14 | Light rain | 20° /11° | 4.9 mm | 4 | |
| Sept. 15 | Overcast | 20° /10° | 0 mm | 4 | |
| Sept. 16 | Sunny | 24° /11° | 0.3 mm | 5.5 | |
| Sept. 17 | Patchy rain possible | 23° /12° | 0.6 mm | 5 | |
| Sept. 18 | Overcast | 26° /13° | 0 mm | 5.3 | |
| Sept. 19 | Sunny | 27° /14° | 0 mm | 5.2 | |
| Sept. 20 | Sunny | 26° /12° | 0 mm | 5.1 | |
| Sept. 21 | Overcast | 23° /11° | 0 mm | 5 | |
| Sept. 22 | Cloudy | 23° /11° | 0 mm | 4 | |
| Sept. 23 | Sunny | 25° /11° | 0 mm | 4.9 | |
| Sept. 24 | Sunny | 29° /12° | 0 mm | 4.8 | |
| Sept. 25 | Patchy rain possible | 26° /12° | 2.1 mm | 4.7 | |
| Sept. 26 |  Partly cloudy | 19° /9° | 0 mm | 4 | |
| Sept. 27 | Sunny | 23° /8° | 0 mm | 4.5 | |
| Sept. 28 | Overcast | 24° /9° | 0 mm | 4.4 | |
| Sept. 29 | Overcast | 21° /9° | 0 mm | 4.3 | |
| Sept. 30 | Sunny | 19° /8° | 0.2 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Nez Perce 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 Nez Perce County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Nez Perce County in September - FAQ
What are the expected maximum and minimum temperatures in Nez Perce County during September?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Nez Perce County during September?
Significant rainfall exceeding 119 mm is expected in Nez Perce County during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Nez Perce County during September?
The average wind speed in Nez Perce County during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Nez Perce County
Explore the daily rainfall trends and prepare for Nez Perce Countys September weather 💧
Typically, Nez Perce County has 5 rainy days in September with a total of 119 mm of rainfall.
UV exposure in Nez Perce County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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