Green Mountain, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Green Mountain, a community in Marshall County, Iowa.
Tonight
46°F
Chance Rain Showers
A chance of rain showers before 5am. Cloudy. Low around 46, with temperatures rising to around 49 overnight. Southwest wind 7 to 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Green Mountain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Chance Rain Showers | 7 to 10 mph SW | 41% |
| Wednesday | 53°F | Chance Rain Showers | 12 to 16 mph W | 39% |
| Wednesday Night | 42°F | Mostly Cloudy then Chance Rain Showers | 13 mph WSW | 29% |
| Thursday | 52°F | Rain Showers Likely | 12 mph NW | 64% |
| Thursday Night | 38°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph N | 16% |
| Friday | 50°F | Partly Sunny | 3 to 8 mph N | 3% |
| Friday Night | 31°F | Partly Cloudy | 2 mph NNW | 0% |
| Saturday | 54°F | Mostly Sunny | 0 to 3 mph WSW | 1% |
| Saturday Night | 35°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 60°F | Sunny | 7 mph WNW | 6% |
| Sunday Night | 37°F | Mostly Clear | 6 mph SW | 2% |
| Monday | 63°F | Sunny | 6 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 6 mph WNW | 0% |
| Tuesday | 62°F | Mostly Sunny | 5 mph NW | 1% |
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.