Sumner, MO Weather & Growing Conditions
This Afternoon
92°F
Sunny
Sunny, with a high near 92. Heat index values as high as 100. South wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 92°F | Sunny | 7 mph S | 8% |
| Tonight | 72°F | Partly Cloudy | 6 mph SSE | 8% |
| Saturday | 93°F | Partly Sunny | 6 to 12 mph SSW | 6% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 to 7 mph W | 60% |
| Sunday | 80°F | Chance Showers And Thunderstorms | 3 to 9 mph NNW | 41% |
| Sunday Night | 61°F | Showers And Thunderstorms Likely | 6 to 12 mph NNE | 64% |
| Monday | 69°F | Showers And Thunderstorms Likely | 8 to 12 mph NNE | 63% |
| Monday Night | 55°F | Chance Rain Showers | 6 to 12 mph NNE | 43% |
| Tuesday | 66°F | Mostly Cloudy | 10 mph NNE | 8% |
| Tuesday Night | 50°F | Mostly Cloudy | 3 to 10 mph NE | 6% |
| Wednesday | 70°F | Mostly Sunny | 3 to 7 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 1 to 5 mph ENE | 3% |
| Thursday | 72°F | Partly Sunny | 1 to 6 mph ENE | 6% |
| Thursday Night | 55°F | Mostly Cloudy | 1 to 5 mph ENE | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sumner, MO
Last spring frost
Apr 14
First fall frost
Oct 23
Growing season
192 days
Hardiness zone
6a
Explore more for Sumner, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Brookfield, Mo (11.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.