De Soto, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for De Soto, a city in Jefferson County, Missouri.
This Afternoon
99°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Sunny, with a high near 99. Heat index values as high as 107. Southwest wind around 2 mph. Chance of precipitation is 30%.
7-day forecast for De Soto
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Chance Showers And Thunderstorms | 2 mph SW | 26% |
| Tonight | 70°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 2 mph S | 22% |
| Saturday | 99°F | Mostly Sunny | 6 mph SW | 4% |
| Saturday Night | 71°F | Partly Cloudy | 5 mph SW | 0% |
| Sunday | 95°F | Mostly Sunny | 5 mph W | 13% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 3 mph N | 54% |
| Monday | 83°F | Showers And Thunderstorms Likely | 2 to 6 mph N | 65% |
| Monday Night | 59°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 3 to 7 mph N | 65% |
| Tuesday | 74°F | Slight Chance Rain Showers then Mostly Cloudy | 7 mph N | 19% |
| Tuesday Night | 53°F | Mostly Cloudy | 2 to 7 mph N | 8% |
| Wednesday | 75°F | Partly Sunny | 6 mph N | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 1 to 5 mph N | 2% |
| Thursday | 77°F | Mostly Sunny | 1 to 5 mph N | 3% |
| Thursday Night | 55°F | Partly Cloudy | 3 mph N | 3% |
Forecast source: National Weather Service (api.weather.gov) for De Soto (38.141, -90.561). Updated through the day.
Growing snapshot for De Soto
Last spring frost
Apr 9
First fall frost
Oct 26
Growing season
197 days
Hardiness zone
6b
More local growing data for De Soto: nearby ZIP 63020 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
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Herculaneum
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Horine
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Kimmswick
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Olympian Village
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Raintree Plantation
Scotsdale
Summer Set
Climate data from the nearest NOAA station, Festus, Mo (12.8 mi from De Soto). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.