Preston Weather in September

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

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

September is in the fall / autumn in Preston and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 5°C (42°F) is normal.

Preston weather averages (imperial / metric)
Daytime temperature 23.6°C 74.5°F
Nightly temperature 5.4°C 41.7°F
Average temperature 14.5°C 58.1°F
Daily sunshine 10.4 hrs
Avg rainfall 32 mm 1.3 ins
Rainy days 6 days
Sea temperature 15.7°C 60.2°F
Humidity 46%
Windspeed 15.1kph 9 mph

On average September is the 3rd driest month of the year in Preston with around 32mm 1.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.4 hours of sunshine per day.

September temperatures in Preston

Preston average temperature in September

September rainfall

Preston average rain in September

September hourly sunshine

Preston 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 Preston in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Preston weather stats

Preston weather statistics
Hottest month: July 30.1°C 86.2°F
Driest month: July 22mm 0.9ins
Sunniest month: July 12.9hrs
Coldest month: January -1°C 30.2°F
Wettest month: May 49mm 1.9ins
Map showing location of Preston (42.09631, -111.87662) Preston map pin © Google

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