Letcher, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Letcher, a town in Sanborn County, South Dakota.
Tonight
60°F
Cloudy
Cloudy, with a low around 60. North wind 5 to 10 mph.
7-day forecast for Letcher
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Cloudy | 5 to 10 mph N | 13% |
| Saturday | 68°F | Patchy Fog then Cloudy | 10 to 15 mph NNE | 12% |
| Saturday Night | 56°F | Cloudy | 10 to 15 mph NNE | 4% |
| Sunday | 65°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph NE | 45% |
| Sunday Night | 53°F | Rain Showers Likely | 10 to 15 mph ENE | 72% |
| Monday | 62°F | Rain Showers Likely | 10 mph E | 72% |
| Monday Night | 48°F | Mostly Cloudy | 5 to 10 mph E | 7% |
| Tuesday | 66°F | Partly Sunny | 5 to 15 mph SE | 4% |
| Tuesday Night | 51°F | Mostly Cloudy | 10 to 15 mph SE | 7% |
| Wednesday | 70°F | Slight Chance Rain Showers | 15 mph SSE | 18% |
| Wednesday Night | 54°F | Chance Rain Showers | 15 mph SSE | 38% |
| Thursday | 71°F | Chance Rain Showers then Partly Sunny | 10 to 15 mph SSE | 38% |
| Thursday Night | 55°F | Mostly Cloudy | 10 mph SE | 8% |
| Friday | 72°F | Partly Sunny | 10 to 15 mph SE | 9% |
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 Sep 19, 2026.