Armour, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Armour, a city in Douglas County, South Dakota.
Today
72°F
Scattered Rain Showers
Scattered rain showers before 5pm. Mostly cloudy, with a high near 72. North northwest wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Armour
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Scattered Rain Showers | 5 to 10 mph NNW | 36% |
| Tonight | 54°F | Partly Cloudy | 0 to 5 mph WSW | 2% |
| Wednesday | 78°F | Mostly Sunny | 5 to 10 mph S | 2% |
| Wednesday Night | 58°F | Partly Cloudy | 10 mph S | 0% |
| Thursday | 85°F | Mostly Sunny | 10 to 15 mph S | 12% |
| Thursday Night | 64°F | Mostly Clear | 10 to 15 mph S | 12% |
| Friday | 90°F | Sunny | 10 mph S | 8% |
| Friday Night | 66°F | Mostly Clear | 10 mph SSE | 7% |
| Saturday | 93°F | Sunny | 10 to 20 mph S | 4% |
| Saturday Night | 67°F | Mostly Clear | 10 to 20 mph SE | 8% |
| Sunday | 91°F | Mostly Sunny | 10 to 15 mph ESE | 3% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 15 mph E | 17% |
| Monday | 90°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph ENE | 17% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 15% |
Forecast source: National Weather Service (api.weather.gov) for Armour (43.319, -98.344). Updated through the day.
Growing snapshot for Armour
Last spring frost
May 3
First fall frost
Oct 6
Growing season
157 days
Hardiness zone
5a
More local growing data for Armour: nearby ZIP 57313 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Armour, Sd (0.7 mi from Armour). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.