Alton, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alton, a city in Oregon County, Missouri.
Tonight
51°F
Partly Cloudy
Partly cloudy. Low around 51, with temperatures rising to around 53 overnight. Southwest wind around 7 mph. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Alton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Partly Cloudy | 7 mph SW | 3% |
| Wednesday | 67°F | Partly Sunny | 6 to 9 mph W | 1% |
| Wednesday Night | 37°F | Mostly Clear | 3 mph W | 0% |
| Thursday | 70°F | Sunny | 3 to 7 mph W | 0% |
| Thursday Night | 42°F | Partly Cloudy | 5 mph NW | 2% |
| Friday | 63°F | Mostly Sunny | 5 to 8 mph N | 1% |
| Friday Night | 35°F | Partly Cloudy | 6 mph N | 0% |
| Saturday | 58°F | Mostly Sunny | 3 mph N | 0% |
| Saturday Night | 32°F | Partly Cloudy | 3 mph N | 0% |
| Sunday | 64°F | Sunny | 5 mph NW | 0% |
| Sunday Night | 32°F | Clear | 2 mph NW | 0% |
| Monday | 67°F | Sunny | 3 mph W | 0% |
| Monday Night | 36°F | Clear | 2 mph SW | 1% |
| Tuesday | 71°F | Sunny | 3 mph W | 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 4, 2026.