Kootenai County (Coeur d'Alene)
September
Weather in Kootenai County, Idaho for September 2025
Your guide to Kootenai County weather in September - trends and predictions
The forecast for the first days of September 2025 in Kootenai County predicts a temperature of 29.9 °F, which is slightly above the historical average.
In general, the average temperature in Kootenai County at the beginning of September is 29 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.7 °F by the end of September.
Kootenai County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 19.4 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
24°/11°
Temperatures
12 km/h
Avg max wind
48 %
Avg humidity
Kootenai County Weather September
Move between months or click on a day
Temperatures trend during September in Kootenai County
See the weather trend as well as the moving average line
September weather in Kootenai County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 29° /10° | 0 mm | 5 | |
| Sept. 2 | Sunny | 32° /12° | 0 mm | 6 | |
| Sept. 3 | Sunny | 33° /13° | 0 mm | 6 | |
| Sept. 4 | Sunny | 30° /13° | 0 mm | 6 | |
| Sept. 5 | Sunny | 30° /10° | 0 mm | 5 | |
| Sept. 6 | Sunny | 23° /11° | 0 mm | 5 | |
| Sept. 7 | Sunny | 26° /10° | 0 mm | 5 | |
| Sept. 8 |  Partly cloudy | 34° /13° | 0 mm | 8 | |
| Sept. 9 | Partly cloudy | 29° /15° | 0 mm | 7 | |
| Sept. 10 | Partly cloudy | 26° /12° | 0 mm | 7 | |
| Sept. 11 |  Moderate rain at times | 18° /11° | 1.3 mm | 4 | |
| Sept. 12 |  Heavy rain at times | 17° /9° | 5 mm | 4 | |
| Sept. 13 |  Cloudy | 21° /9° | 0 mm | 5 | |
| Sept. 14 |  Patchy rain possible | 21° /10° | 0.4 mm | 5 | |
| Sept. 15 | Cloudy | 21° /9° | 0 mm | 5 | |
| Sept. 16 | Sunny | 24° /8° | 0 mm | 6 | |
| Sept. 17 | Heavy rain at times | 16° /11° | 7.7 mm | 4 | |
| Sept. 18 |  Overcast | 20° /9° | 0 mm | 5 | |
| Sept. 19 | Cloudy | 22° /11° | 0 mm | 5 | |
| Sept. 20 | Sunny | 19° /8° | 0 mm | 5 | |
| Sept. 21 | Overcast | 20° /6° | 0 mm | 5 | |
| Sept. 22 | Overcast | 20° /9° | 0 mm | 5 | |
| Sept. 23 | Sunny | 22° /10° | 0 mm | 6 | |
| Sept. 24 | Sunny | 27° /12° | 0 mm | 7 | |
| Sept. 25 | Patchy rain possible | 28° /13° | 4.1 mm | 6 | |
| Sept. 26 | Cloudy | 19° /9° | 0.1 mm | 4 | |
| Sept. 27 | Overcast | 22° /11° | 0 mm | 5 | |
| Sept. 28 | Cloudy | 25° /9° | 0 mm | 6 | |
| Sept. 29 | Moderate rain at times | 17° /8° | 0.8 mm | 4 | |
| Sept. 30 | Sunny | 14° /2° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Kootenai 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 Kootenai County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Kootenai County in September - FAQ
What are the expected maximum and minimum temperatures in Kootenai County during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Kootenai County during September?
Expect minimal rainfall in Kootenai County during September, with a total of 19.4 mm over approximately 6 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Kootenai County during September?
The average wind speed in Kootenai County during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Kootenai County
Explore the daily rainfall trends and prepare for Kootenai Countys September weather 💧
UV exposure in Kootenai County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Kootenai County
Select a location for an accurate weather forecast
More Locations Quick links
More Kootenai County weather pages
You are here
Where is Kootenai County?Get accurate weather forecasts for Kootenai County, located at latitude 47.678 and longitude -116.78. Stay updated with localized weather information tailored for Kootenai County.
Found a mistake?
We appreciate your attention to details. Tell us here.