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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
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.