Bonner County (Sandpoint)
September
Weather in Bonner County, Idaho for September 2027
Your guide to Bonner County weather in September - trends and predictions
In general, the average temperature in Bonner County at the beginning of September is 26.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.8 °C by the end of September.
Bonner County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 121.3 mm.
Is September a good time to visit Bonner County? check out the best time to travel to Bonner County page.
✨ Is September a good time to visit Bonner County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
22°/11°
Temperatures
9 km/h
Avg max wind
54 %
Avg humidity
Bonner County Weather September
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Temperatures trend during September in Bonner County
See the weather trend as well as the moving average line
September weather in Bonner County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 31° /16° | 0.2 mm | 6 | |
| Sept. 2 |  Heavy rain | 27° /15° | 39.4 mm | 6 | |
| Sept. 3 |  Moderate rain | 25° /14° | 12.9 mm | 5 | |
| Sept. 4 | Moderate rain | 23° /13° | 14.4 mm | 5 | |
| Sept. 5 |  Sunny | 25° /10° | 0 mm | 6.1 | |
| Sept. 6 | Sunny | 28° /12° | 0.6 mm | 6 | |
| Sept. 7 |  Light rain | 24° /13° | 5.2 mm | 5 | |
| Sept. 8 | Moderate rain | 26° /12° | 21.8 mm | 5 | |
| Sept. 9 | Sunny | 25° /12° | 0 mm | 5.7 | |
| Sept. 10 |  Patchy rain possible | 25° /13° | 1.4 mm | 5 | |
| Sept. 11 |  Heavy rain at times | 18° /12° | 5.1 mm | 3 | |
| Sept. 12 | Light rain | 18° /11° | 6.3 mm | 3 | |
| Sept. 13 | Light rain | 20° /10° | 4.3 mm | 4 | |
| Sept. 14 | Patchy rain possible | 16° /8° | 2.4 mm | 3 | |
| Sept. 15 | Patchy rain possible | 18° /9° | 0.1 mm | 3 | |
| Sept. 16 | Sunny | 23° /9° | 0 mm | 5.1 | |
| Sept. 17 | Patchy rain possible | 22° /11° | 0.1 mm | 5 | |
| Sept. 18 |  Overcast | 23° /11° | 0 mm | 4.9 | |
| Sept. 19 | Overcast | 24° /11° | 0 mm | 4.8 | |
| Sept. 20 | Sunny | 23° /12° | 0 mm | 4.7 | |
| Sept. 21 | Overcast | 21° /10° | 0 mm | 4 | |
| Sept. 22 | Overcast | 20° /9° | 0 mm | 3 | |
| Sept. 23 | Sunny | 22° /9° | 0 mm | 4.4 | |
| Sept. 24 | Sunny | 24° /11° | 0 mm | 4.4 | |
| Sept. 25 | Light rain | 23° /11° | 4 mm | 4.3 | |
| Sept. 26 | Partly cloudy | 16° /8° | 0.6 mm | 4.2 | |
| Sept. 27 | Overcast | 17° /7° | 0 mm | 3 | |
| Sept. 28 |  Cloudy | 20° /8° | 0 mm | 4 | |
| Sept. 29 | Patchy rain possible | 16° /9° | 0.1 mm | 3 | |
| Sept. 30 | Patchy rain possible | 15° /8° | 2.4 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Bonner 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 Bonner County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Bonner County in September - FAQ
What are the expected maximum and minimum temperatures in Bonner 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 Bonner County during September?
Significant rainfall exceeding 121.3 mm is expected in Bonner County during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Bonner County during September?
The average wind speed in Bonner County during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Bonner County
Explore the daily rainfall trends and prepare for Bonner Countys September weather 💧
Typically, Bonner County has 6 rainy days in September with a total of 121.3 mm of rainfall.
UV exposure in Bonner County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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