Isabel, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Isabel, a town in Corson County, South Dakota.
Today
75°F
Sunny
Sunny, with a high near 75. West northwest wind 8 to 12 mph, with gusts as high as 21 mph.
7-day forecast for Isabel
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Sunny | 8 to 12 mph WNW | 0% |
| Tonight | 52°F | Mostly Clear | 3 to 10 mph SW | 1% |
| Wednesday | 83°F | Sunny | 5 to 10 mph WSW | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 6 to 9 mph S | 1% |
| Thursday | 91°F | Sunny | 7 to 10 mph W | 0% |
| Thursday Night | 60°F | Mostly Clear | 6 to 10 mph E | 0% |
| Friday | 92°F | Sunny | 8 to 13 mph NNE | 0% |
| Friday Night | 61°F | Mostly Clear | 13 mph ESE | 0% |
| Saturday | 94°F | Sunny | 15 mph NE | 1% |
| Saturday Night | 60°F | Mostly Clear | 10 to 14 mph ENE | 3% |
| Sunday | 91°F | Mostly Sunny | 10 to 18 mph E | 9% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms | 13 to 18 mph E | 31% |
| Monday | 88°F | Partly Sunny | 14 to 17 mph ENE | 14% |
| Monday Night | 60°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 13 to 17 mph E | 33% |
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 Aug 4, 2026.