Race weather · 10-year data
When to race in Illinois
Typical race-day conditions for every month, averaged from 10 years of weather history across 439 upcoming race days in Illinois — the same data shown on every race page on Find The Run.
Month by month
Bars show the typical race-day range (22–84°F scale). Tap a month to browse its races.
JanJanuary
22–36°F
20% rain
16 races
FebFebruary
23–40°F
21% rain
10 races
MarMarch
32–51°F
28% rain
21 races
AprApril
41–59°F
32% rain
24 races
MayMay
50–69°F
31% rain
35 races
JunJune
62–81°F
28% rain
25 races
JulJuly
67–84°F
29% rain
12 races
AugAugust
65–81°F
24% rain
11 races
SepSeptember
61–78°F
21% rain
15 races
OctOctober
46–61°F
24% rain
76 races
NovNovember
34–48°F
19% rain
138 races
DecDecember
26–40°F
16% rain
56 races
Races in the sweet spot
Upcoming Illinois races in the best-weather months.
How this is measured: every race on Find The Run carries 10 years of weather history for its exact location and calendar date. These monthly figures average that data across all 439 upcoming race days in Illinois — real race-day conditions in the US, not city-wide monthly normals. Daily lows land around sunrise, so the low end of each range is close to typical start-line temperature.