Groton, SD Weather & Growing Conditions
Overnight
37°F
Light Rain Likely
Rain likely. Cloudy. Low around 37, with temperatures rising to around 41 overnight. North northwest wind around 22 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 37°F | Light Rain Likely | 22 mph NNW | 64% |
| Wednesday | 45°F | Light Rain Likely | 15 to 22 mph NNW | 65% |
| Wednesday Night | 31°F | Mostly Cloudy then Patchy Fog | 14 mph NNW | 1% |
| Thursday | 40°F | Mostly Cloudy | 7 to 14 mph N | 0% |
| Thursday Night | 24°F | Mostly Cloudy | 1 to 6 mph E | 0% |
| Friday | 41°F | Mostly Sunny | 1 to 6 mph S | 0% |
| Friday Night | 26°F | Partly Cloudy | 7 mph S | 0% |
| Saturday | 53°F | Sunny | 7 to 10 mph SW | 1% |
| Saturday Night | 31°F | Mostly Clear | 3 to 7 mph WSW | 0% |
| Sunday | 54°F | Sunny | 3 to 9 mph SSW | 0% |
| Sunday Night | 35°F | Partly Cloudy | 8 mph SSW | 0% |
| Monday | 59°F | Mostly Sunny | 6 to 9 mph W | 0% |
| Monday Night | 32°F | Mostly Clear | 2 to 6 mph WNW | 0% |
| Tuesday | 54°F | Mostly Sunny | 2 to 6 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Groton, SD
Last spring frost
May 6
First fall frost
Oct 4
Growing season
150 days
Hardiness zone
4a
Explore more for Groton, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Andover #2, Sd (10.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.