Cool
Average highs are around 18°C, so pack for cooler days.
October verdict
Joliet, Illinois, United States in October
Weather score33Poor
Poor for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 6.2h per day, enough for a balanced month. Rainfall averages 65mm, which is relatively low for holiday planning.
October weather
Monthly averages
Temp
18°C
Rain
65mm
Sun
6.2h
Sea
15°C
Weather score
33
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 65mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 6.2h per day, enough for a balanced month.
Cool sea
Sea temperatures average 15°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
October18°C average high
October 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
October65mm average rain
October sits near Joliet's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to February, October, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
October6.2 hours average sun
October 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
October15°C average sea
October is close to Joliet's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJuly to September
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
Weather score
October33 weather score
October scores below Joliet's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
