Alton, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alton, a city in Oregon County, Missouri.
Overnight
64°F
Areas Of Fog
Areas of fog. Mostly clear. Low around 64, with temperatures rising to around 66 overnight. Wind around 0 mph.
7-day forecast for Alton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Areas Of Fog | 0 mph | 0% |
| Tuesday | 90°F | Areas Of Fog then Sunny | 2 mph SE | 0% |
| Tuesday Night | 66°F | Mostly Clear | 0 to 3 mph SE | 0% |
| Wednesday | 92°F | Sunny | 0 to 3 mph S | 1% |
| Wednesday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SE | 20% |
| Thursday | 92°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 mph S | 35% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 3 mph S | 50% |
| Friday | 90°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 mph S | 66% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 2 mph S | 40% |
| Saturday | 91°F | Chance Showers And Thunderstorms | 3 mph S | 28% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph S | 16% |
| Sunday | 92°F | Sunny | 1 to 5 mph S | 3% |
| Sunday Night | 71°F | Mostly Clear | 5 mph S | 2% |
| Monday | 93°F | Sunny | 2 to 6 mph S | 4% |
Forecast source: National Weather Service (api.weather.gov) for Alton (36.691, -91.392). Updated through the day.
Growing snapshot for Alton
Last spring frost
Apr 17
First fall frost
Oct 21
Growing season
187 days
Hardiness zone
7a
More local growing data for Alton: nearby ZIP 65606 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Alton, Mo (2.2 mi from Alton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.