Letcher, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Letcher, a town in Sanborn County, South Dakota.
Today
72°F
Partly Sunny
Partly sunny, with a high near 72. Northwest wind 5 to 10 mph.
7-day forecast for Letcher
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Partly Sunny | 5 to 10 mph NW | 8% |
| Tonight | 53°F | Partly Cloudy | 5 mph SSW | 3% |
| Wednesday | 79°F | Mostly Sunny | 5 to 10 mph SSW | 1% |
| Wednesday Night | 59°F | Mostly Clear | 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 | 92°F | Sunny | 10 to 20 mph SSE | 4% |
| Saturday Night | 66°F | Mostly Clear | 10 to 20 mph ESE | 10% |
| Sunday | 89°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) for Letcher (43.900, -98.146). Updated through the day.
Growing snapshot for Letcher
Last spring frost
Apr 27
First fall frost
Oct 11
Growing season
167 days
Hardiness zone
5a
More local growing data for Letcher: nearby ZIP 57359 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mitchell, Sd (10.4 mi from Letcher). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.