Cool
Average highs are around 20°C, so pack for cooler days.
Weather Guide
Forsyth, Illinois, United States Average Monthly Weather
Weather score51Mixed annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 17°C, sunshine averages 7.1h per day, and rainfall totals about 977mm.
Annual weather
Annual averages
Temp
17°C
Rain
977mm
Annual total
Sun
7.1h
Weather score
51
Mixed avg
Seasonal climate calendar
Trip feel
Drier
Rainfall averages 71mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 6.6h per day, enough for a balanced month.
Map
Weather map
Compare Forsyth, Illinois, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
October20°C average high
October is close to Forsyth'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
October71mm average rain
October sits near Forsyth's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
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
October6.6 hours average sun
October sits close to Forsyth'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
October45 weather score
October scores below Forsyth'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.
