Alton, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alton, a city in Oregon County, Missouri.
This Afternoon
70°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 70, with temperatures falling to around 64 in the afternoon. South wind around 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Alton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Showers And Thunderstorms | 14 mph S | 99% |
| Tonight | 48°F | Showers And Thunderstorms Likely then Mostly Cloudy | 5 to 12 mph SW | 60% |
| Wednesday | 64°F | Mostly Sunny | 5 to 9 mph W | 3% |
| Wednesday Night | 37°F | Mostly Clear | 3 mph W | 0% |
| Thursday | 70°F | Sunny | 1 to 5 mph W | 1% |
| Thursday Night | 41°F | Mostly Cloudy | 5 mph NW | 10% |
| Friday | 63°F | Partly Sunny | 5 to 8 mph N | 0% |
| Friday Night | 36°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 60°F | Mostly Sunny | 3 mph N | 0% |
| Saturday Night | 33°F | Partly Cloudy | 2 mph NW | 2% |
| Sunday | 64°F | Sunny | 5 mph NW | 6% |
| Sunday Night | 33°F | Mostly Clear | 3 mph NW | 1% |
| Monday | 68°F | Sunny | 2 to 6 mph W | 1% |
| Monday Night | 36°F | Mostly Clear | 3 mph SW | 0% |
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 Nov 3, 2026.