Ethan, SD Weather & Growing Conditions
This Afternoon
50°F
Chance Rain Showers
A chance of rain showers. Cloudy. High near 50, with temperatures falling to around 46 in the afternoon. North northwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 50°F | Chance Rain Showers | 20 mph NNW | 46% |
| Tonight | 37°F | Chance Rain Showers | 15 to 20 mph NW | 43% |
| Wednesday | 46°F | Rain Showers | 15 to 20 mph NW | 76% |
| Wednesday Night | 35°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph NW | 24% |
| Thursday | 47°F | Partly Sunny | 10 to 15 mph NNW | 5% |
| Thursday Night | 29°F | Mostly Cloudy | 0 to 10 mph NNE | 0% |
| Friday | 48°F | Partly Sunny | 0 to 5 mph SE | 0% |
| Friday Night | 30°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 58°F | Sunny | 5 to 10 mph WSW | 3% |
| Saturday Night | 34°F | Mostly Clear | 5 mph WNW | 3% |
| Sunday | 60°F | Sunny | 5 to 10 mph SW | 1% |
| Sunday Night | 39°F | Mostly Clear | 10 mph SSW | 0% |
| Monday | 61°F | Sunny | 10 to 15 mph WNW | 0% |
| Monday Night | 36°F | Mostly Clear | 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ethan, SD
Last spring frost
May 8
First fall frost
Sep 29
Growing season
143 days
Hardiness zone
5a
Explore more for Ethan, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Alexandria, Sd (12.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.