Silver Bow County (Butte)
September
Weather in Silver Bow County, Montana for September 2026
Your guide to Silver Bow County weather in September - trends and predictions
Until now, September 2026 in Silver Bow County is slightly cooler than the historical average by 1.4 °F.
The forecast for the coming days of September 2026 predicts a temperature of 20.4 °F , which is warmer than usual.
In general, the average temperature in Silver Bow County at the beginning of September is 22.3 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 19.7 °F by the end of September.
With an average of 4 rainy days, Silver Bow County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
26
Dry days
4
Rainy days
0
Snow days
22°/8°
Temperatures
15 km/h
Avg max wind
47 %
Avg humidity
Silver Bow County Weather September
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Temperatures trend during September in Silver Bow County
See the weather trend as well as the moving average line
September weather in Silver Bow County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 26° /10° | 0.4 mm | 6 | |
| Sept. 2 | Sunny | 25° /10° | 0.1 mm | 6 | |
| Sept. 3 | Sunny | 23° /9° | 0 mm | 6 | |
| Sept. 4 | Sunny | 20° /8° | 0.2 mm | 7 | |
| Sept. 5 | Sunny | 20° /5° | 0 mm | 8 | |
| Sept. 6 | Sunny | 23° /6° | 0 mm | 5 | |
| Sept. 7 |  Overcast | 19° /7° | 1.6 mm | 5 | |
| Sept. 8 | Sunny | 19° /4° | 0 mm | 7 | |
| Sept. 9 |  Thundery outbreaks possible | 21° /6° | 0 mm | 5 | |
| Sept. 10 | Thundery outbreaks possible | 24° /7° | 0 mm | 7 | |
| Sept. 11 | Thundery outbreaks possible | 20° /7° | 0.8 mm | 5 | |
| Sept. 12 | Thundery outbreaks possible | 19° /5° | 0 mm | 3 | |
| Sept. 13 | Thundery outbreaks possible | 19° /5° | 0.1 mm | 6 | |
| Sept. 14 | Thundery outbreaks possible | 16° /5° | 0.4 mm | 6 | |
| Sept. 15 |  Moderate or heavy rain with thunder | 15° /3° | 10.8 mm | 4 | |
| Sept. 16 | Overcast | 18° /4° | 0 mm | 5 | |
| Sept. 17 |  Partly cloudy | 22° /6° | 0 mm | 5 | |
| Sept. 18 | Sunny | 22° /7° | 0.9 mm | 4 | |
| Sept. 19 | Overcast | 16° /7° | 9.4 mm | 3 | |
| Sept. 20 | Sunny | 21° /7° | 0 mm | 5 | |
| Sept. 21 | Overcast | 21° /6° | 22.6 mm | 5 | |
| Sept. 22 |  Cloudy | 18° /6° | 2.1 mm | 4 | |
| Sept. 23 | Sunny | 21° /5° | 0 mm | 5 | |
| Sept. 24 | Sunny | 24° /6° | 0 mm | 5 | |
| Sept. 25 | Sunny | 24° /8° | 0.1 mm | 5 | |
| Sept. 26 | Cloudy | 18° /8° | 0 mm | 5 | |
| Sept. 27 | Overcast | 16° /1° | 0 mm | 3.2 | |
| Sept. 28 | Sunny | 17° /5° | 0 mm | 4.3 | |
| Sept. 29 | Overcast | 19° /3° | 0 mm | 4.7 | |
| Sept. 30 | Sunny | 20° /5° | 0 mm | 5.1 | |
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Important Notice
Our weather forecast for Silver Bow 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 Silver Bow County forecast closer to your planned date for the most up-to-date weather information.
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Silver Bow County in September - FAQ
What are the expected maximum and minimum temperatures in Silver Bow County during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Silver Bow County during September?
Moderate rainfall is anticipated in Silver Bow County during September, with a total of 92.6 mm spread over approximately 4 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Silver Bow County during September?
The average wind speed in Silver Bow County during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Silver Bow County
Explore the daily rainfall trends and prepare for Silver Bow Countys September weather 💧
Typically, Silver Bow County has 4 rainy days in September with a total of 92.6 mm of rainfall.
UV exposure in Silver Bow County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Silver Bow County?Get accurate weather forecasts for Silver Bow County, located at latitude 46.004 and longitude -112.535. Stay updated with localized weather information tailored for Silver Bow County.
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