Saint Maries Weather in September

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

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

September is in the fall / autumn in Saint Maries and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 5°C (41°F) is normal.

Saint Maries weather averages (imperial / metric)
Daytime temperature 22.2°C 72°F
Nightly temperature 5.2°C 41.4°F
Average temperature 13.7°C 56.7°F
Daily sunshine 9.6 hrs
Avg rainfall 37 mm 1.5 ins
Rainy days 7 days
Sea temperature 12.9°C 55.2°F
Humidity 56%
Windspeed 12.6kph 8 mph

On average September is the 3rd driest month of the year in Saint Maries with around 37mm 1.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.6 hours of sunshine per day.

September temperatures in Saint Maries

Saint Maries average temperature in September

September rainfall

Saint Maries average rain in September

September hourly sunshine

Saint Maries 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 Saint Maries 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

Saint Maries weather stats

Saint Maries weather statistics
Hottest month: July 27.4°C 81.3°F
Driest month: July 26mm 1ins
Sunniest month: July 13.8hrs
Coldest month: January 0.9°C 33.6°F
Wettest month: January 102mm 4ins
Map showing location of Saint Maries (47.31435, -116.56267) Saint Maries map pin © Google

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