Climate almanac
Chester
Illinois, US · 37.91°, -89.82°
What is the climate like in Chester?
The best time to visit Chester is typically August – October, with trip comfort peaking in September (7.2/10). Chester is warmest in July, when daily highs average 89°F (32°C), and coolest in January, when lows fall to about 28°F (-2°C). The wettest month is typically April and the driest is November; the year sees roughly 48 in of precipitation.
- Best time to visitAugust – October — comfort peaks in September (7.2/10)
- Warmest monthJuly — average high 89°F (32°C)
- Coolest monthJanuary — average low 28°F (-2°C)
- Wettest monthApril (5.7 in)
- Driest monthNovember (2.8 in)
- Annual precipitation48 in