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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.

This Afternoon
87°F
Sunny
Sunny, with a high near 87. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.

7-day forecast for Union Star

WhenTempForecastWindPrecip
This Afternoon 87°F Sunny 7 to 10 mph SW 9%
Tonight 65°F Chance Showers And Thunderstorms then Showers And Thunderstorms 5 to 8 mph NW 67%
Sunday 73°F Chance Showers And Thunderstorms 6 to 9 mph NNE 32%
Sunday Night 60°F Showers And Thunderstorms Likely 7 to 10 mph NNE 51%
Monday 65°F Rain Showers Likely 8 to 12 mph NNE 51%
Monday Night 53°F Slight Chance Rain Showers then Mostly Cloudy 7 to 12 mph NNE 17%
Tuesday 62°F Partly Sunny 9 mph NNE 7%
Tuesday Night 49°F Mostly Cloudy 3 to 8 mph NE 4%
Wednesday 64°F Mostly Sunny 6 mph ENE 0%
Wednesday Night 52°F Partly Cloudy 5 mph E 6%
Thursday 70°F Slight Chance Rain Showers 6 mph SE 23%
Thursday Night 58°F Chance Rain Showers 5 mph ESE 32%
Friday 73°F Chance Rain Showers 6 mph E 33%
Friday Night 60°F Slight Chance Rain Showers 5 mph E 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.