Erwin, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Erwin, a town in Kingsbury County, South Dakota.
Overnight
57°F
Areas Of Fog
Areas of fog. Cloudy, with a low around 57. Northeast wind 5 to 10 mph.
7-day forecast for Erwin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Areas Of Fog | 5 to 10 mph NE | 12% |
| Saturday | 64°F | Areas Of Fog | 10 to 15 mph NE | 12% |
| Saturday Night | 51°F | Mostly Cloudy | 10 to 15 mph NE | 3% |
| Sunday | 64°F | Mostly Cloudy | 15 mph NE | 11% |
| Sunday Night | 48°F | Chance Rain Showers | 10 to 15 mph ENE | 26% |
| Monday | 61°F | Chance Rain Showers | 10 mph E | 26% |
| Monday Night | 44°F | Mostly Cloudy | 5 to 10 mph ESE | 7% |
| Tuesday | 64°F | Partly Sunny | 10 mph SE | 2% |
| Tuesday Night | 48°F | Partly Cloudy | 10 mph SE | 5% |
| Wednesday | 66°F | Partly Sunny | 10 to 15 mph SSE | 11% |
| Wednesday Night | 52°F | Chance Rain Showers | 10 mph SSE | 31% |
| Thursday | 67°F | Chance Rain Showers | 10 mph SSE | 31% |
| Thursday Night | 53°F | Mostly Cloudy | 5 to 10 mph SE | 10% |
| Friday | 69°F | Partly Sunny | 10 to 15 mph SE | 11% |
Forecast source: National Weather Service (api.weather.gov) for Erwin (44.488, -97.441). Updated through the day.
Growing snapshot for Erwin
Last spring frost
May 5
First fall frost
Oct 4
Growing season
151 days
Hardiness zone
4b
More local growing data for Erwin: nearby ZIP 57233 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, De Smet, Sd (11.5 mi from Erwin). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.