Hot
Average highs reach 32°C, so days can feel very hot.
Weather Guide
Marion, Illinois, United States Average Monthly Weather
Weather score52Mixed annual avg
Best months: June, August, July
Across the year, average daytime temperatures are around 19°C, sunshine averages 7.2h per day, and rainfall totals about 1155mm.
Annual weather
Annual averages
Temp
19°C
Rain
1155mm
Annual total
Sun
7.2h
Weather score
52
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 100mm, so some wet days are possible.
Bright
Sunshine averages 10h per day, so bright days are a strong part of the month.
Map
Weather map
Compare Marion, Illinois, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July32°C average high
July is one of Marion'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
July100mm average rain
July sits near Marion's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to February, June to October, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July10 hours average sun
July is one of Marion's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
July79 weather score
July is one of Marion's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.
