Harman US

Letcher, SD Weather & Growing Conditions

Tonight
60°F
Cloudy
Cloudy, with a low around 60. North wind 5 to 10 mph.

7-day forecast

WhenTempForecastWindPrecip
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 5%
Sunday 66°F Chance Rain Showers 10 to 15 mph NE 46%
Sunday Night 53°F Rain Showers Likely 10 to 15 mph ENE 73%
Monday 63°F Rain Showers Likely 10 mph E 73%
Monday Night 48°F Mostly Cloudy 5 to 10 mph E 6%
Tuesday 67°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 19%
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). Updated through the day.

Growing snapshot for Letcher, SD

Last spring frost
Apr 27
First fall frost
Oct 11
Growing season
167 days
Hardiness zone
5a

Explore more for Letcher, SD: full frost dates · planting calendar · South Dakota frost dates

Climate data from the nearest NOAA station, Mitchell, Sd (10.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.