Harman US

Armstrong, MO Weather & Growing Conditions

Today
95°F
Mostly Sunny
Mostly sunny, with a high near 95. Heat index values as high as 99. Southwest wind 7 to 12 mph, with gusts as high as 20 mph.

7-day forecast

WhenTempForecastWindPrecip
Today 95°F Mostly Sunny 7 to 12 mph SW 1%
Tonight 69°F Chance Showers And Thunderstorms 3 to 8 mph WSW 44%
Sunday 83°F Chance Showers And Thunderstorms 3 to 7 mph NNW 50%
Sunday Night 63°F Showers And Thunderstorms 9 mph NNE 86%
Monday 70°F Showers And Thunderstorms 12 mph NE 86%
Monday Night 56°F Chance Rain Showers 8 to 12 mph NNE 29%
Tuesday 67°F Partly Sunny 12 mph NNE 7%
Tuesday Night 50°F Partly Cloudy 5 to 9 mph NNE 3%
Wednesday 71°F Mostly Sunny 7 mph NNE 0%
Wednesday Night 52°F Partly Cloudy 2 to 6 mph NE 1%
Thursday 74°F Partly Sunny 5 mph ENE 7%
Thursday Night 57°F Mostly Cloudy then Slight Chance Rain Showers 5 mph ENE 17%
Friday 75°F Slight Chance Rain Showers 6 mph ENE 19%
Friday Night 57°F Mostly Cloudy 5 mph E 9%

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 Sep 19, 2026.