Harlan Weather in September

What's the weather like in Harlan (Iowa) in September 2024?

The climate in Harlan during September can be summarized as mild and a little damp.

September is in the fall / autumn in Harlan and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 11°C (51°F) is normal.

Harlan weather averages (imperial / metric)
Daytime temperature 24°C 75.2°F
Nightly temperature 10.8°C 51.4°F
Average temperature 17.4°C 63.3°F
Daily sunshine 8.6 hrs
Avg rainfall 93 mm 3.7 ins
Rainy days 9 days
Sea temperature 18.6°C 65.6°F
Humidity 72%
Windspeed 15.8kph 10 mph

On average September is the 5th wettest month of the year in Harlan with around 93mm 3.7 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.6 hours of sunshine per day.

September temperatures in Harlan

Harlan average temperature in September

September rainfall

Harlan average rain in September

September hourly sunshine

Harlan 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 Harlan in September 2024.