Letcher, SD Weather & Growing Conditions
This Afternoon
49°F
Chance Rain Showers
A chance of rain showers. Cloudy. High near 49, with temperatures falling to around 46 in the afternoon. North northwest wind around 25 mph, with gusts as high as 40 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 49°F | Chance Rain Showers | 25 mph NNW | 35% |
| Tonight | 36°F | Rain Showers Likely | 15 to 20 mph NNW | 55% |
| Wednesday | 46°F | Rain Showers | 15 to 20 mph NW | 84% |
| Wednesday Night | 34°F | Chance Rain Showers then Mostly Cloudy | 15 mph NNW | 29% |
| Thursday | 46°F | Partly Sunny | 10 to 15 mph NNW | 4% |
| Thursday Night | 28°F | Mostly Cloudy | 0 to 10 mph NE | 0% |
| Friday | 47°F | Partly Sunny | 0 to 5 mph SE | 0% |
| Friday Night | 29°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 58°F | Mostly Sunny | 5 to 10 mph WSW | 3% |
| Saturday Night | 34°F | Mostly Clear | 5 to 10 mph W | 2% |
| Sunday | 59°F | Sunny | 5 to 10 mph SSW | 1% |
| Sunday Night | 37°F | Mostly Clear | 10 mph S | 0% |
| Monday | 61°F | Sunny | 10 to 15 mph WNW | 0% |
| Monday Night | 35°F | Mostly Clear | 5 to 10 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Letcher, SD
Last spring frost
Apr 27
First fall frost
Oct 11
Growing season
167 days
Hardiness zone
5a
Explore more for Letcher, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Mitchell, Sd (10.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.