Cool
Average highs are around 15°C, so pack for cooler days.
April verdict
Joliet, Illinois, United States in April
Weather score28Poor
Poor for holiday weather
Average highs are around 15°C, so pack for cooler days. Sunshine averages 7.1h per day, enough for a balanced month. Rainfall averages 99mm, so some wet days are possible.
April weather
Monthly averages
Temp
15°C
Rain
99mm
Sun
7.1h
Sea
4°C
Weather score
28
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 99mm, so some wet days are possible.
Some sun
Sunshine averages 7.1h per day, enough for a balanced month.
Cool sea
Sea temperatures average 4°C, so the water can feel cool.
Map
Weather map
Compare Joliet, Illinois, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
April15°C average high
April is close to Joliet's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
April99mm average rain
April is one of Joliet's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to February, October, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
April7.1 hours average sun
April sits close to Joliet'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.
Sea temperature
April4°C average sea
April is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJuly to September
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
Weather score
April28 weather score
April 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.
