Bonners Ferry Weather in September

What's the weather like in Bonners Ferry (Idaho) in September 2025?

The climate in Bonners Ferry during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Bonners Ferry and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 20°C (68°F), whilst at night 4°C (40°F) is normal.

Bonners Ferry weather averages (imperial / metric)
Daytime temperature 20.2°C 68.4°F
Nightly temperature 4.4°C 39.9°F
Average temperature 12.3°C 54.1°F
Daily sunshine 8.1 hrs
Avg rainfall 41 mm 1.6 ins
Rainy days 9 days
Sea temperature 12.5°C 54.5°F
Humidity 62%
Windspeed 10.4kph 7 mph

On average September is the 3rd driest month of the year in Bonners Ferry with around 41mm 1.6 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.1 hours of sunshine per day.

September temperatures in Bonners Ferry

Bonners Ferry average temperature in September

September rainfall

Bonners Ferry average rain in September

September hourly sunshine

Bonners Ferry average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Bonners Ferry in September 2025.

Other monthly averages

Best places to visit in September

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Current (hourly) weather 15 day forecast

Bonners Ferry weather stats

Bonners Ferry weather statistics
Hottest month: July 26.1°C 79°F
Driest month: July 33mm 1.3ins
Sunniest month: July 12.2hrs
Coldest month: January -1.4°C 29.5°F
Wettest month: December 88mm 3.5ins
Map showing location of Bonners Ferry (48.69133, -116.31631) Bonners Ferry map pin © Google

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