Letcher, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Letcher, a town in Sanborn County, South Dakota.
Overnight
60°F
Patchy Fog
Patchy fog. Cloudy, with a low around 60. North wind around 10 mph.
7-day forecast for Letcher
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Patchy Fog | 10 mph N | 12% |
| Saturday | 68°F | Patchy Fog then Cloudy | 10 to 15 mph N | 18% |
| Saturday Night | 55°F | Cloudy | 10 to 15 mph NNE | 13% |
| Sunday | 66°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph NE | 26% |
| Sunday Night | 52°F | Rain Showers Likely | 10 to 15 mph ENE | 70% |
| Monday | 63°F | Rain Showers Likely | 10 mph E | 70% |
| Monday Night | 46°F | Mostly Cloudy | 5 to 10 mph ESE | 7% |
| Tuesday | 66°F | Partly Sunny | 10 to 15 mph SE | 4% |
| Tuesday Night | 49°F | Partly Cloudy | 10 to 15 mph SE | 4% |
| Wednesday | 69°F | Partly Sunny | 15 to 20 mph SSE | 13% |
| Wednesday Night | 53°F | Chance Rain Showers | 15 mph SSE | 35% |
| Thursday | 71°F | Chance Showers And Thunderstorms | 15 mph SSE | 35% |
| Thursday Night | 55°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph SE | 16% |
| Friday | 74°F | Slight Chance Rain Showers then Partly Sunny | 15 mph SE | 16% |
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.