Mild
Average highs are around 21°C, so days are mild rather than hot.
October verdict
O'Fallon, Illinois, United States in October
Weather score49Mixed
Mixed for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 6.7h per day, enough for a balanced month. Rainfall averages 64mm, which is relatively low for holiday planning.
October weather
Monthly averages
Temp
21°C
Rain
64mm
Sun
6.7h
Weather score
49
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 64mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 6.7h per day, enough for a balanced month.
Map
Weather map
Compare O'Fallon, Illinois, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
October21°C average high
October is close to O'Fallon'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
October64mm average rain
October sits on the drier side of O'Fallon's year, which helps with sightseeing and transfers.
Driest monthsJanuary to February and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
October6.7 hours average sun
October sits close to O'Fallon'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.
Weather score
October49 weather score
October sits close to O'Fallon's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.
