Rexburg Weather in September

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

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

September is in the fall / autumn in Rexburg and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 22°C (71°F), whilst at night 4°C (39°F) is normal.

Rexburg weather averages (imperial / metric)
Daytime temperature 21.7°C 71°F
Nightly temperature 3.8°C 38.8°F
Average temperature 12.7°C 54.9°F
Daily sunshine 10.1 hrs
Avg rainfall 24 mm 1 ins
Rainy days 6 days
Sea temperature 15.2°C 59.4°F
Humidity 49%
Windspeed 14.4kph 9 mph

On average September is the 3rd driest month of the year in Rexburg with around 24mm 1 inches of rain making it a 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 10.1 hours of sunshine per day.

September temperatures in Rexburg

Rexburg average temperature in September

September rainfall

Rexburg average rain in September

September hourly sunshine

Rexburg 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 Rexburg 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

Rexburg weather stats

Rexburg weather statistics
Hottest month: July 28°C 82.4°F
Driest month: July 19mm 0.7ins
Sunniest month: July 12.9hrs
Coldest month: January -3°C 26.6°F
Wettest month: June 42mm 1.7ins
Map showing location of Rexburg (43.82602, -111.78969) Rexburg map pin © Google

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