Cobalt, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cobalt, a village in Madison County, Missouri.
This Afternoon
71°F
Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 71, with temperatures falling to around 66 in the afternoon. South wind 14 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 100%.
7-day forecast for Cobalt
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Rain | 14 to 17 mph S | 98% |
| Tonight | 49°F | Rain | 5 to 14 mph SW | 94% |
| Wednesday | 68°F | Partly Sunny | 3 to 9 mph W | 1% |
| Wednesday Night | 37°F | Mostly Clear | 1 to 5 mph SW | 0% |
| Thursday | 73°F | Sunny | 1 to 8 mph SW | 2% |
| Thursday Night | 40°F | Slight Chance Light Rain then Mostly Cloudy | 1 to 5 mph W | 20% |
| Friday | 65°F | Partly Sunny | 3 to 8 mph NW | 2% |
| Friday Night | 36°F | Partly Cloudy | 1 to 5 mph N | 0% |
| Saturday | 62°F | Partly Sunny | 1 to 5 mph N | 0% |
| Saturday Night | 32°F | Partly Cloudy | 2 mph NW | 2% |
| Sunday | 63°F | Sunny | 1 to 7 mph NW | 5% |
| Sunday Night | 31°F | Mostly Clear | 1 to 5 mph NW | 4% |
| Monday | 66°F | Sunny | 1 to 6 mph W | 3% |
| Monday Night | 33°F | Mostly Clear | 0 to 3 mph SW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Cobalt (37.545, -90.287). Updated through the day.
Growing snapshot for Cobalt
Last spring frost
Apr 21
First fall frost
Oct 16
Growing season
174 days
Hardiness zone
6b
More local growing data for Cobalt: 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 Cobalt). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.