Boise City Weather in September

What's the weather like in Boise City (Oklahoma) in September 2025?

The climate in Boise City during September can be summarized as warm and reasonably dry.

September is in the fall / autumn in Boise City and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 27°C (81°F), whilst at night 11°C (52°F) is normal.

Boise City weather averages (imperial / metric)
Daytime temperature 27°C 80.5°F
Nightly temperature 10.9°C 51.5°F
Average temperature 18.9°C 66°F
Daily sunshine 9.7 hrs
Avg rainfall 43 mm 1.7 ins
Rainy days 7 days
Sea temperature 20.4°C 68.8°F
Humidity 55%
Windspeed 19.4kph 12 mph

On average September is the 5th wettest month of the year in Boise City with around 43mm 1.7 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 9.7 hours of sunshine per day.

September temperatures in Boise City

Boise City average temperature in September

September rainfall

Boise City average rain in September

September hourly sunshine

Boise City 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 Boise City 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

Boise City weather stats

Boise City weather statistics
Hottest month: July 32.8°C 91°F
Driest month: January 8mm 0.3ins
Sunniest month: July 11.9hrs
Coldest month: January 8.4°C 47.1°F
Wettest month: July 71mm 2.8ins
Map showing location of Boise City (36.72947, -102.51324) Boise City map pin © Google

Locations nearby

Top United States locations