Letcher, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Letcher, a town in Sanborn County, South Dakota.
This Afternoon
50°F
Rain Showers Likely
Rain showers likely. Cloudy. High near 50, 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 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Letcher
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 50°F | Rain Showers Likely | 25 mph NNW | 56% |
| Tonight | 37°F | Rain Showers Likely | 20 mph NW | 56% |
| Wednesday | 45°F | Rain Showers | 20 mph NW | 71% |
| Wednesday Night | 35°F | Rain Showers Likely | 15 mph NNW | 58% |
| Thursday | 46°F | Partly Sunny | 15 mph NNW | 12% |
| Thursday Night | 29°F | Mostly Cloudy | 5 to 10 mph N | 3% |
| Friday | 46°F | Partly Sunny | 5 mph E | 1% |
| Friday Night | 30°F | Mostly Cloudy | 5 mph S | 0% |
| Saturday | 55°F | Mostly Sunny | 5 to 10 mph WSW | 4% |
| Saturday Night | 34°F | Partly Cloudy | 10 mph WNW | 2% |
| Sunday | 53°F | Sunny | 5 to 10 mph W | 1% |
| Sunday Night | 34°F | Mostly Clear | 5 mph S | 0% |
| Monday | 58°F | Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 35°F | Partly Cloudy | 5 mph NW | 0% |
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 Nov 3, 2026.