Cool
Average highs are around -3°C, so pack for cooler days.
January verdict
Poor for holiday weather
Average highs are around -3°C, so pack for cooler days. Sunshine averages 5h per day, enough for a balanced month. Rainfall averages 22mm, which is relatively low for holiday planning.
Monthly averages
Temp
-3°C
Rain
22mm
Sun
5h
Weather score
37
Poor
Cool
Average highs are around -3°C, so pack for cooler days.
Drier
Rainfall averages 22mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5h per day, enough for a balanced month.
Map
Compare Waterloo, Iowa, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
January-3°C average high
January 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.
January22mm average rain
January is one of Waterloo'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.
January5 hours average sun
January is below Waterloo's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
January37 weather score
January 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.