Eureka, SD Weather & Growing Conditions
This Afternoon
66°F
Cloudy
Cloudy. High near 66, with temperatures falling to around 63 in the afternoon. Northeast wind around 14 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Cloudy | 14 mph NE | 6% |
| Tonight | 56°F | Cloudy then Chance Rain Showers | 9 to 15 mph ENE | 41% |
| Sunday | 59°F | Chance Rain Showers | 17 mph ENE | 41% |
| Sunday Night | 48°F | Chance Rain Showers | 8 to 14 mph ENE | 42% |
| Monday | 63°F | Partly Sunny | 12 mph E | 7% |
| Monday Night | 43°F | Partly Cloudy | 10 mph SE | 2% |
| Tuesday | 64°F | Mostly Sunny | 9 to 21 mph SE | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 22 mph SE | 4% |
| Wednesday | 67°F | Partly Sunny then Slight Chance Rain Showers | 22 to 25 mph SE | 16% |
| Wednesday Night | 52°F | Showers And Thunderstorms Likely | 16 to 24 mph SE | 62% |
| Thursday | 72°F | Chance Showers And Thunderstorms | 10 to 15 mph SE | 46% |
| Thursday Night | 53°F | Partly Cloudy | 9 mph SE | 8% |
| Friday | 73°F | Partly Sunny | 9 to 20 mph SE | 6% |
| Friday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 18 to 22 mph SE | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Eureka, SD
Last spring frost
May 12
First fall frost
Sep 27
Growing season
137 days
Hardiness zone
4b
Explore more for Eureka, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Eureka, Sd (1.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.