Spencer Weather in September

What's the weather like in Spencer (Iowa) in September 2025?

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

September is in the fall / autumn in Spencer and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 9°C (48°F) is normal.

Spencer weather averages (imperial / metric)
Daytime temperature 22.6°C 72.6°F
Nightly temperature 8.9°C 47.9°F
Average temperature 15.7°C 60.3°F
Daily sunshine 8.5 hrs
Avg rainfall 84 mm 3.3 ins
Rainy days 9 days
Sea temperature 17.3°C 63.2°F
Humidity 72%
Windspeed 16.9kph 11 mph

On average September is the 5th wettest month of the year in Spencer with around 84mm 3.3 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 8.5 hours of sunshine per day.

September temperatures in Spencer

Spencer average temperature in September

September rainfall

Spencer average rain in September

September hourly sunshine

Spencer 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 Spencer 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

Spencer weather stats

Spencer weather statistics
Hottest month: July 28.6°C 83.5°F
Driest month: January 16mm 0.6ins
Sunniest month: July 11.6hrs
Coldest month: January -5°C 23°F
Wettest month: June 115mm 4.5ins
Map showing location of Spencer (43.14136, -95.14444) Spencer map pin © Google

Locations nearby

Top United States locations