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Weather in Romeoville, IL · National Weather Service + NOAA

Weather in Romeoville

Romeoville has chilly, snowy winters and warm summers. A typical July afternoon reaches 84°, a January night drops to 16°, and about 33 inches of snow falls in a normal winter. In November, a normal day reaches 49° and a normal night drops to 32°.

Winter 35°/19°Spring 60°/39°Summer 83°/62°Fall 63°/43°
Right now
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Sunrise 7:28 am · sunset 5:43 pm

Getting the latest forecast from the National Weather Service…

A normal year

Where today sits in Romeoville’s year

Typical highs and lows month by month, from 30 years of NOAA records.

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Winter
35° / 19°
10 days with an inch or more of snow
Spring
60° / 39°
Last frost around Apr 20
Summer
83° / 62°
16 days reach 90° in a normal year
Fall now
63° / 43°
First frost around Oct 22
Pastthe usual first frost (Oct 22). Last frost next spring: Apr 20
Best months to be outside
MayJunAugSepOct
Highs of 62–84° and lows of 40° or more
How much snow does Romeoville get?About 33 inches a winter.When is it wettest?May, with 4.5 inches.Is it warmer than it used to be?+1.3° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Romeoville.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Romeoville itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Romeoville Wfo, IL (2 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.