Isabel, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Isabel, a town in Corson County, South Dakota.
Tonight
30°F
Partly Cloudy
Partly cloudy, with a low around 30. North northwest wind 12 to 17 mph, with gusts as high as 26 mph.
7-day forecast for Isabel
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 30°F | Partly Cloudy | 12 to 17 mph NNW | 0% |
| Wednesday | 50°F | Partly Sunny | 14 to 18 mph NNW | 0% |
| Wednesday Night | 30°F | Patchy Fog | 10 to 15 mph NNW | 0% |
| Thursday | 48°F | Patchy Fog then Mostly Sunny | 5 to 9 mph NNE | 0% |
| Thursday Night | 27°F | Partly Cloudy | 7 mph SE | 0% |
| Friday | 50°F | Mostly Sunny | 7 mph SW | 0% |
| Friday Night | 31°F | Partly Cloudy | 6 to 10 mph WSW | 3% |
| Saturday | 57°F | Sunny | 10 to 21 mph W | 3% |
| Saturday Night | 32°F | Mostly Clear | 7 to 10 mph W | 0% |
| Sunday | 60°F | Sunny | 7 to 12 mph SSW | 0% |
| Sunday Night | 39°F | Mostly Clear | 9 to 15 mph WSW | 0% |
| Monday | 58°F | Sunny | 7 to 20 mph NW | 0% |
| Monday Night | 34°F | Partly Cloudy | 7 mph W | 1% |
| Tuesday | 56°F | Mostly Sunny | 7 to 10 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov) for Isabel (45.394, -101.432). Updated through the day.
Growing snapshot for Isabel
Last spring frost
May 11
First fall frost
Sep 30
Growing season
140 days
Hardiness zone
4b
More local growing data for Isabel: nearby ZIP 57633 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Glad Valley 2 W, Sd (13.8 mi from Isabel). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.