Summit, SD Weather & Growing Conditions
Today
69°F
Mostly Sunny
Mostly sunny, with a high near 69. West northwest wind 9 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Mostly Sunny | 9 to 15 mph WNW | 0% |
| Tonight | 53°F | Mostly Clear | 5 to 8 mph SW | 0% |
| Wednesday | 75°F | Sunny | 9 to 13 mph SW | 0% |
| Wednesday Night | 59°F | Partly Cloudy | 8 to 16 mph SSW | 1% |
| Thursday | 80°F | Sunny | 14 to 17 mph SW | 4% |
| Thursday Night | 63°F | Mostly Clear | 10 to 15 mph SSW | 6% |
| Friday | 81°F | Sunny | 9 to 14 mph SW | 9% |
| Friday Night | 62°F | Mostly Clear | 6 to 9 mph SE | 9% |
| Saturday | 81°F | Sunny | 6 to 13 mph SE | 8% |
| Saturday Night | 62°F | Slight Chance Showers And Thunderstorms | 13 mph E | 21% |
| Sunday | 79°F | Slight Chance Rain Showers then Mostly Sunny | 12 mph ENE | 19% |
| Sunday Night | 62°F | Partly Cloudy then Chance Showers And Thunderstorms | 9 mph E | 28% |
| Monday | 76°F | Chance Showers And Thunderstorms | 9 to 13 mph ENE | 28% |
| Monday Night | 61°F | Slight Chance Showers And Thunderstorms | 12 mph NE | 18% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Summit, SD
Last spring frost
May 14
First fall frost
Sep 28
Growing season
136 days
Hardiness zone
4a
Explore more for Summit, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Summit 1 W, Sd (1.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.