Letcher, SD Weather & Growing Conditions
Today
73°F
Isolated Rain Showers then Partly Sunny
Isolated rain showers between 10am and 11am. Partly sunny, with a high near 73. Northwest wind around 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Isolated Rain Showers then Partly Sunny | 10 mph NW | 16% |
| Tonight | 53°F | Partly Cloudy | 5 mph SSW | 1% |
| Wednesday | 79°F | Mostly Sunny | 5 to 10 mph SSW | 1% |
| Wednesday Night | 59°F | Partly Cloudy | 10 mph S | 1% |
| Thursday | 86°F | Mostly Sunny | 10 to 15 mph S | 6% |
| Thursday Night | 64°F | Mostly Clear | 10 to 15 mph S | 6% |
| Friday | 90°F | Sunny | 10 mph S | 5% |
| Friday Night | 65°F | Mostly Clear | 10 mph SSE | 8% |
| Saturday | 93°F | Sunny | 10 to 20 mph SSE | 4% |
| Saturday Night | 66°F | Mostly Clear | 10 to 20 mph ESE | 10% |
| Sunday | 90°F | Mostly Sunny | 10 to 15 mph E | 6% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 20% |
| Monday | 89°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph ENE | 20% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 15% |
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 Aug 4, 2026.