Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
Weather Guide
Normal, Illinois, United States Average Monthly Weather
Weather score50Mixed annual avg
Best months: July, June, August
Across the year, average daytime temperatures are around 16°C, sunshine averages 6.9h per day, and rainfall totals about 939mm.
Annual weather
Annual averages
Temp
16°C
Rain
939mm
Annual total
Sun
6.9h
Weather score
50
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 84mm, so some wet days are possible.
Bright
Sunshine averages 9.1h per day, so bright days are a strong part of the month.
Map
Weather map
Compare Normal, Illinois, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August29°C average high
August is one of Normal's warmest months, with daytime heat above the yearly average.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
August84mm average rain
August is wetter than Normal'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
August9.1 hours average sun
August is brighter than Normal'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.
Weather score
August79 weather score
August is one of Normal's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
