Chester weather
Loading live data…The weather map: all three models at once
NWS, American, European side by side around Chester and nearby towns.Live rain radar →Next 14 hours
consensus of the three models14-day forecast
where the models agree, and where they splitChester, IL is at its warmest in Jul (average highs near 88°F) and coldest in Jan (lows around 28°F), with roughly 42 in of precipitation across the year. Below, compare what NWS, American, European forecast for Chester right now, and see exactly where they disagree.
We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.
Chester climate by month
average daytime high and overnight low across a typical yearWhich forecast is most accurate in the US?
CheckWeather Score — graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.