#1Metropolis
Massac County · 5,727 peopleJuly high·January low 27°·42 days of 90°+ a year
Metropolis, #1 on this list · Photo: Nyttend · Public domainIllinois rankings · Climate
Towns with the hottest summers in Illinois
Metropolis has the hottest summers of Illinois’ 713 towns of 2,500+: July afternoons average a high of 89° (NOAA 1991–2020 normals). The typical town here averages 84°; none of the 713 average 90° or more.
The average July high. NOAA U.S. Climate Normals, 1991–2020, from NOAA’s 5 km grid at each town’s center; one town for each grid cell. A described list: no letters. How grades work
#189°
Dupo
St. Clair County · 3,766 peopleJuly high·January low 24°·39 days of 90°+ a year
Centreville Township
St. Clair County · 19,067 peopleJuly high·January low 24°·46 days of 90°+ a year
All 713 towns
July high, highest first. Towns with the same figure share a rank (T = tied; 705 towns here).
713 towns ranked. Not here? See why a town may be missing.
#TownJuly highDays ≥90°January low
Quick answers
Questions people ask
Which Illinois town has the hottest summers?
Metropolis (Massac County): July afternoons average a high of 89°. Dupo (89°) and Centreville Township (89°) follow.
How are these towns ranked?
By the average July high (the warmest month’s afternoons), highest first, on NOAA’s 1991–2020 normals, read from its 5 km grid at each town’s center. Towns with the same figure share a rank (T); the figure and the state rank are the ones on each town’s Climate page. How grades work.
Why isn’t my town on this list?
The list covers towns of 2,500+ residents, one for each of NOAA’s 5 km grid cells (713 in Illinois): where towns share a cell, one of them stands for it, since the grid gives them the same figures. Every town’s own figures are on its Climate page. Every town is on the Illinois page.
Go deeper
All Illinois rankings →More Illinois lists
Every list ranks the same 2,500+ towns, so a town’s rank means the same thing on each.
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