Cool
Average highs are around -1°C, so pack for cooler days.
December verdict
Sioux City, Iowa, United States in December
Weather score36Poor
Poor for holiday weather
Average highs are around -1°C, so pack for cooler days. Sunshine averages 4.4h per day, so this is not one of the brighter months. Rainfall averages 20mm, which is relatively low for holiday planning.
December weather
Monthly averages
Temp
-1°C
Rain
20mm
Sun
4.4h
Weather score
36
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 20mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4.4h per day, so this is not one of the brighter months.
Map
Weather map
Compare Sioux City, Iowa, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December-1°C average high
December has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
December20mm average rain
December is one of Sioux City's driest months, making outdoor days easier to plan than in wetter parts of the year.
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
December4.4 hours average sun
December is one of Sioux City's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
December36 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
