Armour, SD Weather & Growing Conditions
Overnight
58°F
Patchy Smoke
Patchy smoke. Mostly cloudy, with a low around 58. North northwest wind around 15 mph, with gusts as high as 25 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Patchy Smoke | 15 mph NNW | 7% |
| Tuesday | 72°F | Chance Rain Showers | 5 to 15 mph NNW | 31% |
| Tuesday Night | 54°F | Mostly Cloudy | 0 to 5 mph WSW | 2% |
| Wednesday | 79°F | Mostly Sunny | 0 to 10 mph S | 2% |
| Wednesday Night | 58°F | Partly Cloudy | 5 to 10 mph S | 0% |
| Thursday | 86°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 | 94°F | Sunny | 10 to 20 mph S | 4% |
| Saturday Night | 68°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% |
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 Aug 4, 2026.