New Underwood, SD Weather & Growing Conditions
Today
68°F
Chance Rain Showers
A chance of rain showers and patchy fog. Cloudy. High near 68, with temperatures falling to around 66 in the afternoon. East wind 8 to 12 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Chance Rain Showers | 8 to 12 mph E | 43% |
| Tonight | 50°F | Showers And Thunderstorms Likely | 12 mph E | 71% |
| Sunday | 61°F | Rain Showers | 12 to 16 mph E | 99% |
| Sunday Night | 48°F | Rain Showers | 7 to 15 mph NE | 97% |
| Monday | 64°F | Chance Rain Showers | 6 to 14 mph E | 39% |
| Monday Night | 46°F | Mostly Cloudy | 14 mph SE | 7% |
| Tuesday | 72°F | Mostly Sunny | 14 to 22 mph SE | 2% |
| Tuesday Night | 52°F | Partly Cloudy | 21 mph SE | 7% |
| Wednesday | 80°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 17 to 23 mph S | 18% |
| Wednesday Night | 54°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 16 mph SW | 17% |
| Thursday | 83°F | Mostly Sunny | 2 to 8 mph N | 1% |
| Thursday Night | 55°F | Mostly Clear | 9 mph SE | 4% |
| Friday | 83°F | Mostly Sunny | 9 to 18 mph SE | 5% |
| Friday Night | 57°F | Slight Chance Rain Showers then Partly Cloudy | 20 mph SE | 16% |
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 Sep 19, 2026.