Arco Weather in September

What's the weather like in Arco (Idaho) in September 2024?

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

September is in the fall / autumn in Arco and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 22°C (72°F), whilst at night 3°C (38°F) is normal.

Arco weather averages (imperial / metric)
Daytime temperature 22.2°C 71.9°F
Nightly temperature 3.1°C 37.5°F
Average temperature 12.6°C 54.7°F
Daily sunshine 10.2 hrs
Avg rainfall 19 mm 0.7 ins
Rainy days 6 days
Sea temperature 14.9°C 58.9°F
Humidity 49%
Windspeed 14.8kph 9 mph

On average September is the 3rd driest month of the year in Arco with around 19mm 0.7 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 10.2 hours of sunshine per day.

September temperatures in Arco

Arco average temperature in September

September rainfall

Arco average rain in September

September hourly sunshine

Arco 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 Arco in September 2024.