Rock Rapids Weather in September

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

The climate in Rock Rapids during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Rock Rapids and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 23°C (74°F), whilst at night 9°C (48°F) is normal.

Rock Rapids weather averages (imperial / metric)
Daytime temperature 23.4°C 74°F
Nightly temperature 8.9°C 47.9°F
Average temperature 16.1°C 61°F
Daily sunshine 8.6 hrs
Avg rainfall 73 mm 2.9 ins
Rainy days 9 days
Sea temperature 17.2°C 62.9°F
Humidity 71%
Windspeed 17.6kph 11 mph

On average September is the 5th wettest month of the year in Rock Rapids with around 73mm 2.9 inches of rain making it a reasonably dry 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 Rock Rapids

Rock Rapids average temperature in September

September rainfall

Rock Rapids average rain in September

September hourly sunshine

Rock Rapids 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 Rock Rapids 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

Rock Rapids weather stats

Rock Rapids weather statistics
Hottest month: July 29.9°C 85.8°F
Driest month: January 12mm 0.5ins
Sunniest month: July 11.8hrs
Coldest month: January -4.5°C 23.9°F
Wettest month: June 104mm 4.1ins
Map showing location of Rock Rapids (43.42719, -96.17586) Rock Rapids map pin © Google

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