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Union Star, MO Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Union Star, a town in Andrew County, Missouri.

Overnight
72°F
Partly Cloudy
Partly cloudy, with a low around 72. South wind around 9 mph, with gusts as high as 20 mph. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Union Star

WhenTempForecastWindPrecip
Overnight 72°F Partly Cloudy 9 mph S 5%
Saturday 87°F Chance Rain Showers then Partly Sunny 7 to 12 mph SSW 26%
Saturday Night 65°F Showers And Thunderstorms Likely 7 mph NNW 64%
Sunday 75°F Chance Showers And Thunderstorms 6 to 10 mph N 44%
Sunday Night 60°F Chance Showers And Thunderstorms 7 to 10 mph NE 49%
Monday 65°F Chance Rain Showers 12 mph NE 49%
Monday Night 54°F Chance Rain Showers then Mostly Cloudy 6 to 12 mph NNE 29%
Tuesday 63°F Mostly Cloudy 9 mph NE 8%
Tuesday Night 49°F Mostly Cloudy 3 to 8 mph ENE 5%
Wednesday 66°F Mostly Sunny 6 mph ENE 2%
Wednesday Night 53°F Mostly Cloudy 5 mph E 6%
Thursday 68°F Slight Chance Rain Showers 5 mph ESE 17%
Thursday Night 56°F Mostly Cloudy then Slight Chance Rain Showers 3 mph E 19%
Friday 69°F Slight Chance Rain Showers 6 mph ESE 19%

Forecast source: National Weather Service (api.weather.gov) for Union Star (39.979, -94.598). Updated through the day.

Growing snapshot for Union Star

Last spring frost
Apr 17
First fall frost
Oct 19
Growing season
184 days
Hardiness zone
6a

More local growing data for Union Star: nearby ZIP 64494 weather · frost dates · planting calendar · Missouri frost dates

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Climate data from the nearest NOAA station, Cosby 2W, Mo (10.8 mi from Union Star). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.