Summit, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Summit, a town in Grant County, South Dakota.
Today
62°F
Areas Of Fog
Areas of fog and a slight chance of drizzle. Cloudy, with a high near 62. Northeast wind around 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
7-day forecast for Summit
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 62°F | Areas Of Fog | 13 mph NE | 16% |
| Tonight | 51°F | Patchy Fog then Slight Chance Rain Showers | 8 to 12 mph NNE | 15% |
| Sunday | 62°F | Patchy Fog then Cloudy | 13 mph NE | 14% |
| Sunday Night | 48°F | Cloudy | 7 to 10 mph E | 8% |
| Monday | 61°F | Partly Sunny | 9 mph E | 8% |
| Monday Night | 44°F | Partly Cloudy | 8 mph ESE | 6% |
| Tuesday | 63°F | Mostly Sunny | 6 to 13 mph SE | 2% |
| Tuesday Night | 46°F | Partly Cloudy | 10 mph SSE | 2% |
| Wednesday | 66°F | Mostly Sunny | 10 to 15 mph SSE | 9% |
| Wednesday Night | 51°F | Chance Rain Showers | 12 mph SSE | 25% |
| Thursday | 68°F | Chance Rain Showers then Partly Sunny | 13 mph SSE | 25% |
| Thursday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 9 mph SSE | 17% |
| Friday | 70°F | Slight Chance Rain Showers then Partly Sunny | 9 to 14 mph SSE | 17% |
| Friday Night | 55°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 14 mph SSE | 20% |
Forecast source: National Weather Service (api.weather.gov) for Summit (45.306, -97.039). Updated through the day.
Growing snapshot for Summit
Last spring frost
May 14
First fall frost
Sep 28
Growing season
136 days
Hardiness zone
4a
More local growing data for Summit: nearby ZIP 57266 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Summit 1 W, Sd (1.8 mi from Summit). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.