Isabel, SD Weather & Growing Conditions
Tonight
54°F
Patchy Fog
Patchy fog between 9pm and 2am. Cloudy. Low around 54, with temperatures rising to around 56 overnight. Northeast wind 6 to 9 mph, with gusts as high as 16 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Patchy Fog | 6 to 9 mph NE | 3% |
| Saturday | 65°F | Patchy Fog then Cloudy | 7 to 12 mph NE | 13% |
| Saturday Night | 52°F | Rain Showers Likely | 10 to 14 mph E | 74% |
| Sunday | 60°F | Rain Showers | 12 to 15 mph E | 81% |
| Sunday Night | 50°F | Rain Showers Likely | 12 mph E | 74% |
| Monday | 62°F | Slight Chance Rain Showers | 9 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 | 7% |
| Tuesday Night | 52°F | Mostly Cloudy | 18 to 22 mph SE | 11% |
| Wednesday | 75°F | Partly Sunny then Slight Chance Rain Showers | 16 to 21 mph SE | 16% |
| Wednesday Night | 54°F | Chance Rain Showers then Partly Cloudy | 7 to 15 mph SE | 25% |
| Thursday | 76°F | Mostly Sunny | 7 to 10 mph SE | 5% |
| Thursday Night | 54°F | Partly Cloudy | 12 mph SE | 7% |
| Friday | 76°F | Partly Sunny | 12 to 21 mph SE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Isabel, SD
Last spring frost
May 11
First fall frost
Sep 30
Growing season
140 days
Hardiness zone
4b
Explore more for Isabel, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Glad Valley 2 W, Sd (13.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.