Mild
Average highs are around 24°C, so days are mild rather than hot.
September verdict
Waterloo, Iowa, United States in September
Weather score57Good
Good for holiday weather
Average highs are around 24°C, so days are mild rather than hot. Sunshine averages 7.5h per day, enough for a balanced month. Rainfall averages 92mm, so some wet days are possible.
September weather
Monthly averages
Temp
24°C
Rain
92mm
Sun
7.5h
Weather score
57
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 92mm, so some wet days are possible.
Some sun
Sunshine averages 7.5h per day, enough for a balanced month.
Map
Weather map
Compare Waterloo, 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
September92mm average rain
September is wetter than Waterloo'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
September7.5 hours average sun
September sits close to Waterloo's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
September57 weather score
September sits close to Waterloo'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.
