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 686 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 (20–84°F scale). Tap a month to browse its races.
JanJanuary
20–33°F
20% rain
11 races
FebFebruary
25–41°F
22% rain
8 races
MarMarch
33–51°F
28% rain
18 races
AprApril
40–58°F
33% rain
16 races
MayMay
50–68°F
30% rain
27 races
JunJune
62–80°F
29% rain
21 races
JulJuly
67–84°F
29% rain
7 races
AugAugust
65–81°F
25% rain
3 races
SepSeptember
60–77°F
21% rain
237 races
OctOctober
49–66°F
24% rain
195 races
NovNovember
34–48°F
19% rain
108 races
DecDecember
26–40°F
16% rain
35 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 686 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.