Mild
Average highs are around 24°C, so days are mild rather than hot.
September verdict
Sioux City, Iowa, United States in September
Weather score61Good
Good for holiday weather
Average highs are around 24°C, so days are mild rather than hot. Sunshine averages 7.8h per day, enough for a balanced month. Rainfall averages 73mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
24°C
Rain
73mm
Sun
7.8h
Weather score
61
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 73mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.8h per day, enough for a balanced month.
Map
Weather map
Compare Sioux City, Iowa, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September24°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
September73mm average rain
September is wetter than Sioux City's yearly average, so flexible plans matter more.
Driest monthsJanuary to February and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September7.8 hours average sun
September sits close to Sioux City's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
September61 weather score
September sits close to Sioux City's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
