Grand Mound, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grand Mound, a city in Clinton County, Iowa.
Today
54°F
Chance Rain Showers
A chance of rain showers between 7am and 3pm. Cloudy, with a high near 54. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
7-day forecast for Grand Mound
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 54°F | Chance Rain Showers | 10 mph SW | 33% |
| Tonight | 46°F | Slight Chance Rain Showers | 10 mph SW | 21% |
| Thursday | 55°F | Chance Rain Showers | 5 to 10 mph W | 49% |
| Thursday Night | 41°F | Mostly Cloudy | 5 mph N | 13% |
| Friday | 50°F | Partly Sunny | 5 mph N | 4% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 0 to 5 mph W | 2% |
| Sunday | 57°F | Sunny | 5 mph W | 2% |
| Sunday Night | 35°F | Clear | 0 mph | 0% |
| Monday | 62°F | Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 0 to 5 mph W | 0% |
| Tuesday | 63°F | Sunny | 0 to 5 mph NW | 0% |
| Tuesday Night | 40°F | Partly Cloudy | 0 mph | 0% |
Forecast source: National Weather Service (api.weather.gov) for Grand Mound (41.824, -90.651). Updated through the day.
Growing snapshot for Grand Mound
Last spring frost
Apr 27
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5a
More local growing data for Grand Mound: nearby ZIP 52751 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Andover
Calamus
Camanche
Charlotte
Clinton
Delmar
DeWitt
Goose Lake
Lost Nation
Low Moor
Toronto
Welton
Wheatland
Climate data from the nearest NOAA station, Lowden, Ia (11.6 mi from Grand Mound). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.