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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

WhenTempForecastWindPrecip
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

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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.