New Underwood, SD Weather & Growing Conditions
Today
55°F
Partly Sunny
Partly sunny. High near 55, with temperatures falling to around 49 in the afternoon. Northwest wind 9 to 15 mph, with gusts as high as 26 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Partly Sunny | 9 to 15 mph NW | 0% |
| Tonight | 32°F | Partly Cloudy | 6 to 10 mph NW | 0% |
| Thursday | 54°F | Mostly Sunny | 3 to 7 mph NE | 0% |
| Thursday Night | 31°F | Partly Cloudy | 5 to 8 mph S | 0% |
| Friday | 56°F | Mostly Sunny | 2 to 13 mph NW | 0% |
| Friday Night | 34°F | Mostly Clear | 2 to 6 mph W | 0% |
| Saturday | 63°F | Sunny | 5 to 15 mph NW | 0% |
| Saturday Night | 35°F | Mostly Clear | 7 mph SW | 0% |
| Sunday | 67°F | Sunny | 5 to 9 mph S | 0% |
| Sunday Night | 40°F | Mostly Clear | 8 mph W | 0% |
| Monday | 62°F | Sunny | 5 to 9 mph NW | 0% |
| Monday Night | 37°F | Partly Cloudy | 6 mph W | 0% |
| Tuesday | 63°F | Mostly Sunny | 5 to 8 mph SE | 0% |
| Tuesday Night | 39°F | Partly Cloudy | 6 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for New Underwood, SD
Last spring frost
May 8
First fall frost
Oct 3
Growing season
146 days
Hardiness zone
5a
Explore more for New Underwood, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Elm Springs 3 Ese, Sd (16.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.