Cool
Average highs are around 20°C, so pack for cooler days.
May verdict
Waukegan, Illinois, United States in May
Weather score43Mixed
Mixed for holiday weather
Average highs are around 20°C, so pack for cooler days. Sunshine averages 8.8h per day, so bright days are a strong part of the month. Rainfall averages 82mm, so some wet days are possible.
May weather
Monthly averages
Temp
20°C
Rain
82mm
Sun
8.8h
Sea
6°C
Weather score
43
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 82mm, so some wet days are possible.
Bright
Sunshine averages 8.8h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 6°C, so the water can feel cool.
Map
Weather map
Compare Waukegan, Illinois, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May20°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
May82mm average rain
May is wetter than Waukegan's yearly average, so flexible plans matter more.
Driest monthsJanuary to February, October, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May8.8 hours average sun
May is brighter than Waukegan's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May6°C average sea
May is below Waukegan's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 20°C in this stretch, so swimming comfort is at its strongest.
Weather score
May43 weather score
May sits close to Waukegan's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
