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Weather in Green Castle, MO · National Weather Service + NOAA

Green Castle stays cool in summer

Green Castle has chilly winters and warm summers. A typical July afternoon reaches 86°, a January night drops to 16°, and about 19 inches of snow falls in a normal winter. In November, a normal day reaches 51° and a normal night drops to 31°.

Winter 37°/19°Spring 62°/41°Summer 84°/63°Fall 64°/43°
Right now
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Sunrise 7:43 am · sunset 6:06 pm

Getting the latest forecast from the National Weather Service…

What stands out about Green Castle’s weather

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

Climate →
Cool summersJuly afternoons average 86°, cooler than 1,327 of 1,353 Missouri towns.A short growing season169 frost-free days, from Apr 26 to Oct 14.Among Missouri’s coldest wintersJanuary nights average 16°, colder than 1,238 of 1,353 Missouri towns.Barely warmer than a century agoThe last 30 years averaged 0.6° warmer than the 1900s, a smaller shift than 94% of U.S. towns.
A normal year

Where today sits in Green Castle’s year

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

Full climate →
Winter
37° / 19°
7 days with an inch or more of snow
Spring
62° / 41°
Last frost around Apr 26
Summer
84° / 63°
25 days reach 90° in a normal year
Fall now
64° / 43°
First frost around Oct 14
Pastthe usual first frost (Oct 14). Last frost next spring: Apr 26
Best months to be outside
AprMayJunSepOct
Highs of 62–84° and lows of 40° or more
How much snow does Green Castle get?About 19 inches a winter.When is it wettest?May, with 5.7 inches.Is it warmer than it used to be?+0.6° vs. the 20th century.

Weather talk

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

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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 Green Castle itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Kirksville, MO (16 mi, snow) and Green City 5n, MO (7 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.