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
52°F
Partly Sunny
Partly sunny. High near 52, with temperatures falling to around 47 in the afternoon. North northwest wind 15 to 18 mph.
7-day forecast for Isabel
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Partly Sunny | 15 to 18 mph NNW | 0% |
| Tonight | 29°F | Mostly Cloudy then Areas Of Fog | 9 to 15 mph NNW | 0% |
| Thursday | 44°F | Areas Of Fog then Mostly Sunny | 5 to 9 mph NE | 0% |
| Thursday Night | 26°F | Partly Cloudy | 6 to 9 mph SE | 0% |
| Friday | 48°F | Mostly Sunny | 5 to 8 mph S | 0% |
| Friday Night | 30°F | Mostly Clear | 5 to 10 mph SSW | 0% |
| Saturday | 59°F | Sunny | 9 to 18 mph W | 0% |
| Saturday Night | 32°F | Mostly Clear | 6 to 9 mph WSW | 0% |
| Sunday | 60°F | Sunny | 6 to 13 mph SSW | 0% |
| Sunday Night | 39°F | Mostly Clear | 9 to 13 mph WSW | 0% |
| Monday | 60°F | Sunny | 6 to 15 mph NW | 0% |
| Monday Night | 34°F | Partly Cloudy | 6 mph W | 1% |
| Tuesday | 56°F | Mostly Sunny | 6 to 9 mph S | 0% |
| Tuesday Night | 36°F | Partly Cloudy | 7 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 5, 2026.