Cobalt, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cobalt, a village in Madison County, Missouri.
Overnight
62°F
Clear
Clear, with a low around 62. Northeast wind around 1 mph.
7-day forecast for Cobalt
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Clear | 1 mph NE | 0% |
| Tuesday | 87°F | Patchy Fog then Sunny | 0 to 3 mph SE | 0% |
| Tuesday Night | 65°F | Mostly Clear | 0 to 3 mph E | 0% |
| Wednesday | 90°F | Sunny | 0 to 5 mph S | 2% |
| Wednesday Night | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph S | 19% |
| Thursday | 88°F | Chance Showers And Thunderstorms | 2 to 6 mph S | 44% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 1 to 6 mph S | 56% |
| Friday | 87°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 to 5 mph SW | 56% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 3 mph SW | 40% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 1 to 5 mph S | 28% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph S | 17% |
| Sunday | 89°F | Sunny | 3 to 8 mph S | 4% |
| Sunday Night | 71°F | Mostly Clear | 3 to 8 mph S | 3% |
| Monday | 91°F | Sunny | 3 to 8 mph SW | 3% |
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 Aug 4, 2026.