Tarkio, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tarkio, a city in Atchison County, Missouri.
Today
86°F
Partly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 86. Northeast wind 1 to 6 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Tarkio
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 1 to 6 mph NE | 17% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 8 to 12 mph NNE | 68% |
| Wednesday | 76°F | Showers And Thunderstorms Likely | 10 mph NE | 58% |
| Wednesday Night | 62°F | Chance Showers And Thunderstorms | 2 to 9 mph NE | 29% |
| Thursday | 83°F | Mostly Sunny | 3 mph E | 9% |
| Thursday Night | 65°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 3 mph SE | 23% |
| Friday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 3 to 7 mph S | 23% |
| Friday Night | 70°F | Mostly Clear | 6 mph SSE | 6% |
| Saturday | 91°F | Sunny | 5 to 13 mph S | 3% |
| Saturday Night | 75°F | Mostly Clear | 14 mph S | 6% |
| Sunday | 94°F | Mostly Sunny | 10 to 14 mph S | 6% |
| Sunday Night | 75°F | Partly Cloudy | 15 mph S | 8% |
| Monday | 94°F | Mostly Sunny | 12 to 16 mph S | 5% |
| Monday Night | 76°F | Partly Cloudy | 13 to 16 mph S | 10% |
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 Aug 4, 2026.