Isabel, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Isabel, a town in Corson County, South Dakota.
This Afternoon
68°F
Patchy Fog
Patchy fog before 5pm. Cloudy, with a high near 68. East northeast wind around 7 mph.
7-day forecast for Isabel
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Patchy Fog | 7 mph ENE | 1% |
| Tonight | 54°F | Areas Of Fog | 8 mph NE | 6% |
| Saturday | 66°F | Patchy Fog then Cloudy | 7 to 13 mph ENE | 14% |
| Saturday Night | 52°F | Rain Showers Likely | 10 to 14 mph ENE | 74% |
| Sunday | 60°F | Rain Showers | 15 mph E | 80% |
| Sunday Night | 49°F | Rain Showers | 8 to 12 mph E | 77% |
| Monday | 63°F | Slight Chance Rain Showers | 8 to 13 mph E | 23% |
| Monday Night | 48°F | Mostly Cloudy | 14 mph SE | 7% |
| Tuesday | 68°F | Partly Sunny | 15 to 23 mph SE | 6% |
| Tuesday Night | 52°F | Mostly Cloudy | 21 mph SE | 11% |
| Wednesday | 75°F | Partly Sunny then Slight Chance Rain Showers | 17 to 21 mph SE | 16% |
| Wednesday Night | 54°F | Chance Rain Showers then Partly Cloudy | 7 to 16 mph SE | 27% |
| Thursday | 76°F | Mostly Sunny | 7 to 10 mph SE | 5% |
| Thursday Night | 54°F | Partly Cloudy | 10 mph ESE | 8% |
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 Sep 19, 2026.