Union, MO Weather & Growing Conditions
Today
60°F
Slight Chance Drizzle then Mostly Cloudy
A slight chance of drizzle before noon. Mostly cloudy, with a high near 60. West wind 5 to 10 mph, with gusts as high as 21 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 60°F | Slight Chance Drizzle then Mostly Cloudy | 5 to 10 mph W | 12% |
| Tonight | 38°F | Mostly Clear | 2 mph SW | 0% |
| Thursday | 64°F | Sunny | 2 to 7 mph W | 0% |
| Thursday Night | 40°F | Mostly Cloudy | 2 mph NW | 3% |
| Friday | 56°F | Partly Sunny | 2 to 6 mph N | 2% |
| Friday Night | 31°F | Partly Cloudy | 2 mph N | 0% |
| Saturday | 55°F | Mostly Sunny | 1 mph N | 0% |
| Saturday Night | 29°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 61°F | Sunny | 2 mph NW | 1% |
| Sunday Night | 31°F | Clear | 0 mph | 0% |
| Monday | 66°F | Sunny | 2 mph NW | 0% |
| Monday Night | 36°F | Clear | 1 mph W | 1% |
| Tuesday | 69°F | Sunny | 2 mph W | 1% |
| Tuesday Night | 38°F | Mostly Clear | 0 mph | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Union, MO
Last spring frost
Apr 11
First fall frost
Oct 23
Growing season
194 days
Hardiness zone
6b
Explore more for Union, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Union, Mo (1.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.