Tarkio, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tarkio, a city in Atchison County, Missouri.
Today
55°F
Mostly Cloudy
Mostly cloudy, with a high near 55. West northwest wind 10 to 15 mph, with gusts as high as 22 mph.
7-day forecast for Tarkio
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Mostly Cloudy | 10 to 15 mph WNW | 5% |
| Tonight | 40°F | Partly Cloudy | 8 mph W | 1% |
| Thursday | 54°F | Mostly Cloudy | 8 to 12 mph NW | 13% |
| Thursday Night | 40°F | Mostly Cloudy | 3 to 7 mph NNW | 2% |
| Friday | 54°F | Partly Sunny | 2 to 6 mph N | 2% |
| Friday Night | 34°F | Partly Cloudy | 1 mph N | 0% |
| Saturday | 56°F | Mostly Sunny | 0 to 3 mph SSW | 1% |
| Saturday Night | 36°F | Mostly Clear | 2 mph WSW | 0% |
| Sunday | 63°F | Sunny | 3 mph WSW | 0% |
| Sunday Night | 39°F | Clear | 3 mph SSW | 0% |
| Monday | 68°F | Sunny | 3 to 9 mph SSW | 0% |
| Monday Night | 42°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 68°F | Mostly Sunny | 5 mph N | 0% |
| Tuesday Night | 45°F | Partly Cloudy | 2 mph ESE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Tarkio (40.443, -95.384). Updated through the day.
Growing snapshot for Tarkio
Last spring frost
Apr 19
First fall frost
Oct 15
Growing season
177 days
Hardiness zone
5b
More local growing data for Tarkio: nearby ZIP 64491 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Tarkio, Mo (1.8 mi from Tarkio). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.