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Weather in Mount Prospect, IL · National Weather Service + NOAA

Weather in Mount Prospect

Mount Prospect has chilly, snowy winters and pleasant summers. A typical July afternoon reaches 84°, a January night drops to 16°, and about 34 inches of snow falls in a normal winter. Normal November highs come to 48°, and lows to 32°.

Winter 34°/19°Spring 58°/38°Summer 82°/61°Fall 62°/43°
Right now
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Sunrise 7:26 am · sunset 5:44 pm

Getting the latest forecast from the National Weather Service…

A normal year

Where today sits in Mount Prospect’s year

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

Full climate →
Winter
34° / 19°
12 days with an inch or more of snow
Spring
58° / 38°
Last frost around Apr 26
Summer
82° / 61°
17 days reach 90° in a normal year
Fall now
62° / 43°
First frost around Oct 21
Pastthe usual first frost (Oct 21). Last frost next spring: Apr 26
Best months to be outside
MayJunJulAugSepOct
Highs of 62–84° and lows of 40° or more
How much snow does Mount Prospect get?About 34 inches a winter.When is it wettest?June, with 4.6 inches.Is it warmer than it used to be?+1.4° vs. the 20th century.

Weather talk

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

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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 Mount Prospect itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Chicago Botanic Garden, IL (9 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.