Ethan, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ethan, a town in Davison County, South Dakota.
Today
72°F
Slight Chance Rain Showers
A slight chance of rain showers between 8am and 2pm. Partly sunny, with a high near 72. North northwest wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Ethan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Slight Chance Rain Showers | 5 to 10 mph NNW | 15% |
| Tonight | 53°F | Partly Cloudy | 5 mph SW | 2% |
| Wednesday | 79°F | Mostly Sunny | 5 to 10 mph S | 1% |
| Wednesday Night | 58°F | Mostly Clear | 5 to 10 mph S | 0% |
| Thursday | 86°F | Sunny | 10 to 15 mph S | 5% |
| Thursday Night | 65°F | Mostly Clear | 10 to 15 mph S | 6% |
| Friday | 90°F | Sunny | 10 mph SSW | 6% |
| Friday Night | 65°F | Mostly Clear | 5 to 10 mph S | 9% |
| Saturday | 93°F | Sunny | 5 to 15 mph SSE | 5% |
| Saturday Night | 67°F | Mostly Clear | 10 to 15 mph SE | 8% |
| Sunday | 90°F | Mostly Sunny | 10 to 15 mph ESE | 4% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 17% |
| Monday | 89°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph ENE | 17% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 15% |
Forecast source: National Weather Service (api.weather.gov) for Ethan (43.546, -97.983). Updated through the day.
Growing snapshot for Ethan
Last spring frost
May 8
First fall frost
Sep 29
Growing season
143 days
Hardiness zone
5a
More local growing data for Ethan: nearby ZIP 57334 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Alexandria, Sd (12.8 mi from Ethan). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.