Junction City, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Junction City, a village in Madison County, Missouri.
This Afternoon
98°F
Mostly Sunny
Mostly sunny, with a high near 98. Heat index values as high as 100. Southwest wind around 6 mph.
7-day forecast for Junction City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 98°F | Mostly Sunny | 6 mph SW | 1% |
| Tonight | 70°F | Mostly Clear | 5 mph SW | 1% |
| Sunday | 95°F | Mostly Sunny | 5 mph W | 2% |
| Sunday Night | 66°F | Partly Cloudy then Chance Showers And Thunderstorms | 3 mph NE | 39% |
| Monday | 86°F | Chance Showers And Thunderstorms | 2 to 6 mph NE | 65% |
| Monday Night | 60°F | Showers And Thunderstorms Likely | 6 mph N | 65% |
| Tuesday | 75°F | Chance Showers And Thunderstorms then Partly Sunny | 6 to 9 mph N | 26% |
| Tuesday Night | 54°F | Partly Cloudy | 3 to 9 mph N | 3% |
| Wednesday | 75°F | Mostly Sunny | 8 mph N | 0% |
| Wednesday Night | 52°F | Partly Cloudy | 1 to 6 mph N | 0% |
| Thursday | 77°F | Mostly Sunny | 1 to 6 mph N | 1% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Friday | 79°F | Slight Chance Rain Showers | 0 to 7 mph N | 15% |
| Friday Night | 56°F | Slight Chance Rain Showers then Partly Cloudy | 1 to 5 mph NE | 15% |
Forecast source: National Weather Service (api.weather.gov) for Junction City (37.574, -90.293). Updated through the day.
Growing snapshot for Junction City
Last spring frost
Apr 21
First fall frost
Oct 16
Growing season
174 days
Hardiness zone
6b
More local growing data for Junction City: nearby ZIP 63645 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Fredericktown, Mo (2.4 mi from Junction City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.