Armstrong, MO Weather & Growing Conditions
Today
91°F
Sunny
Sunny, with a high near 91. Heat index values as high as 96. South wind 3 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Sunny | 3 to 7 mph S | 2% |
| Tonight | 71°F | Partly Cloudy | 1 to 6 mph SE | 12% |
| Wednesday | 89°F | Chance Showers And Thunderstorms | 7 mph SSE | 48% |
| Wednesday Night | 68°F | Showers And Thunderstorms Likely | 7 mph NE | 82% |
| Thursday | 86°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph SW | 82% |
| Thursday Night | 67°F | Partly Cloudy | 3 mph ESE | 6% |
| Friday | 88°F | Mostly Sunny | 5 mph S | 14% |
| Friday Night | 69°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 3 mph S | 20% |
| Saturday | 91°F | Slight Chance Showers And Thunderstorms then Sunny | 3 to 8 mph SSW | 20% |
| Saturday Night | 73°F | Mostly Clear | 6 to 9 mph S | 5% |
| Sunday | 92°F | Sunny | 8 to 14 mph SSW | 3% |
| Sunday Night | 73°F | Mostly Clear | 10 mph SSW | 4% |
| Monday | 93°F | Sunny | 8 to 14 mph SSW | 5% |
| Monday Night | 75°F | Mostly Clear | 12 mph SSW | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Armstrong, MO
Last spring frost
Apr 12
First fall frost
Oct 22
Growing season
190 days
Hardiness zone
6b
Explore more for Armstrong, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Salisbury, Mo (11.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.