Green Mountain, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Green Mountain, a community in Marshall County, Iowa.
Overnight
46°F
Chance Rain Showers
A chance of rain showers. Cloudy, with a low around 46. West wind around 13 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
7-day forecast for Green Mountain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Chance Rain Showers | 13 mph W | 27% |
| Wednesday | 51°F | Chance Rain Showers | 16 mph W | 33% |
| Wednesday Night | 43°F | Cloudy then Slight Chance Rain Showers | 13 mph W | 17% |
| Thursday | 54°F | Chance Rain Showers then Cloudy | 12 mph NW | 47% |
| Thursday Night | 37°F | Mostly Cloudy | 9 mph N | 13% |
| Friday | 49°F | Mostly Sunny | 3 to 8 mph N | 3% |
| Friday Night | 28°F | Partly Cloudy | 0 to 3 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 0 to 3 mph W | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 57°F | Sunny | 6 mph W | 1% |
| Sunday Night | 35°F | Clear | 3 mph SW | 0% |
| Monday | 63°F | Sunny | 3 to 9 mph SW | 0% |
| Monday Night | 39°F | Clear | 6 mph WNW | 0% |
| Tuesday | 62°F | Sunny | 3 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Green Mountain (42.102, -92.820). Updated through the day.
Growing snapshot for Green Mountain
Last spring frost
Apr 28
First fall frost
Oct 7
Growing season
162 days
Hardiness zone
5a
More local growing data for Green Mountain: nearby ZIP 50158 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Albion
Clemons
Ferguson
Gilman
Haverhill
Laurel
Le Grand
Liscomb
Marshalltown
Melbourne
Rhodes
St. Anthony
State Center
Climate data from the nearest NOAA station, Marshalltown, Ia (1.6 mi from Green Mountain). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.