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Weather in Allendale, IL · National Weather Service + NOAA

Allendale has milder winters than most of Illinois

Allendale has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 88°, a January night drops to 23°, and about 9 inches of snow falls in a normal winter. Normal November highs come to 55°, and lows to 36°.

Winter 42°/26°Spring 66°/45°Summer 86°/65°Fall 68°/46°
Right now
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Sunrise 7:18 am · sunset 5:50 pm

Getting the latest forecast from the National Weather Service…

What stands out about Allendale’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Milder winters than most of IllinoisJanuary nights average 23°, milder than 2,631 of 2,886 Illinois towns.A long growing season209 frost-free days, from Apr 2 to Oct 31.Less snow than most of IllinoisAbout 9 inches a winter, less than 2,718 of 2,880 Illinois towns.Wetter than most of Illinois48 inches of rain and melted snow a year, more than 2,815 of 2,886 Illinois towns.
A normal year

Where today sits in Allendale’s year

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

Full climate →
Winter
42° / 26°
4 days with an inch or more of snow
Spring
66° / 45°
Last frost around Apr 2
Summer
86° / 65°
46 days reach 90° in a normal year
Fall now
68° / 46°
First frost around Oct 31
Pastthe usual first frost (Oct 31). Last frost next spring: Apr 2
Best months to be outside
AprMaySepOct
Highs of 62–84° and lows of 40° or more
How much snow does Allendale get?About 9 inches a winter.When is it wettest?May, with 5.2 inches.Is it warmer than it used to be?+1.0° vs. the 20th century.

Weather talk

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

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