Harman US

Armour, SD Weather & Growing Conditions

This Afternoon
66°F
Cloudy
Cloudy, with a high near 66. North wind around 10 mph.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 66°F Cloudy 10 mph N 6%
Tonight 55°F Cloudy then Slight Chance Rain Showers 10 mph NNE 15%
Sunday 64°F Chance Rain Showers 10 to 15 mph NE 45%
Sunday Night 51°F Rain Showers 10 mph ENE 76%
Monday 61°F Rain Showers 10 mph E 76%
Monday Night 46°F Mostly Cloudy 5 to 10 mph E 9%
Tuesday 65°F Partly Sunny 5 to 15 mph SE 7%
Tuesday Night 48°F Partly Cloudy 10 to 15 mph SE 7%
Wednesday 69°F Partly Sunny then Slight Chance Rain Showers 15 mph SSE 19%
Wednesday Night 53°F Chance Showers And Thunderstorms 10 to 15 mph SE 42%
Thursday 71°F Chance Showers And Thunderstorms 10 to 15 mph SSE 42%
Thursday Night 54°F Slight Chance Rain Showers 10 mph SE 18%
Friday 73°F Slight Chance Rain Showers then Partly Sunny 10 to 15 mph SE 17%
Friday Night 56°F Mostly Cloudy then Slight Chance Rain Showers 15 mph SE 21%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Armour, SD

Last spring frost
May 3
First fall frost
Oct 6
Growing season
157 days
Hardiness zone
5a

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

Climate data from the nearest NOAA station, Armour, Sd (0.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.