Union Star, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Union Star, a town in Andrew County, Missouri.
Tonight
45°F
Patchy Drizzle
Patchy drizzle before 2am. Cloudy, with a low around 45. West northwest wind 10 to 14 mph, with gusts as high as 21 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Union Star
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 45°F | Patchy Drizzle | 10 to 14 mph WNW | 12% |
| Wednesday | 55°F | Mostly Cloudy | 12 to 16 mph W | 4% |
| Wednesday Night | 41°F | Partly Cloudy | 9 mph W | 1% |
| Thursday | 54°F | Partly Sunny | 8 to 12 mph NW | 9% |
| Thursday Night | 42°F | Mostly Cloudy | 8 mph NNW | 4% |
| Friday | 53°F | Partly Sunny | 5 to 8 mph N | 1% |
| Friday Night | 33°F | Partly Cloudy | 0 to 3 mph ENE | 0% |
| Saturday | 55°F | Mostly Sunny | 3 mph S | 0% |
| Saturday Night | 36°F | Mostly Clear | 2 mph WSW | 0% |
| Sunday | 61°F | Sunny | 2 to 6 mph W | 0% |
| Sunday Night | 39°F | Clear | 5 mph SW | 0% |
| Monday | 66°F | Sunny | 5 to 9 mph SSW | 0% |
| Monday Night | 42°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 67°F | Sunny | 6 mph N | 0% |
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 Nov 4, 2026.