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
85°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 4pm. Mostly sunny. High near 85, with temperatures falling to around 83 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast for Grand Mound
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 27% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 85% |
| Wednesday | 77°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph NE | 72% |
| Wednesday Night | 60°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph N | 61% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 0 mph | 34% |
| Thursday Night | 60°F | Mostly Clear | 0 mph | 4% |
| Friday | 82°F | Mostly Sunny | 0 mph | 5% |
| Friday Night | 64°F | Mostly Clear | 0 mph | 8% |
| Saturday | 86°F | Sunny | 5 mph S | 11% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 mph S | 19% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SW | 19% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 mph SW | 37% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 37% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph S | 37% |
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 Aug 4, 2026.