Le Grand, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Le Grand, a city in Marshall County, Iowa.
Overnight
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. Low around 66, with temperatures rising to around 68 overnight. Southeast wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Le Grand
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Chance Showers And Thunderstorms | 8 mph SE | 46% |
| Saturday | 80°F | Showers And Thunderstorms Likely | 8 mph SW | 63% |
| Saturday Night | 60°F | Chance Showers And Thunderstorms | 9 mph N | 38% |
| Sunday | 66°F | Chance Rain Showers | 9 to 13 mph NE | 40% |
| Sunday Night | 54°F | Chance Rain Showers | 12 mph ENE | 46% |
| Monday | 62°F | Chance Rain Showers | 12 mph NE | 49% |
| Monday Night | 49°F | Chance Rain Showers | 7 to 10 mph NE | 49% |
| Tuesday | 60°F | Slight Chance Rain Showers then Partly Sunny | 8 mph ENE | 23% |
| Tuesday Night | 45°F | Partly Cloudy | 6 mph ENE | 3% |
| Wednesday | 65°F | Sunny | 5 mph ENE | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 3 mph E | 4% |
| Thursday | 66°F | Partly Sunny | 3 mph E | 12% |
| Thursday Night | 52°F | Mostly Cloudy | 2 mph E | 9% |
| Friday | 68°F | Partly Sunny | 5 mph E | 6% |
Forecast source: National Weather Service (api.weather.gov) for Le Grand (42.007, -92.775). Updated through the day.
Growing snapshot for Le Grand
Last spring frost
Apr 28
First fall frost
Oct 7
Growing season
162 days
Hardiness zone
5a
More local growing data for Le Grand: nearby ZIP 50142 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Albion
Clemons
Ferguson
Gilman
Green Mountain
Haverhill
Laurel
Liscomb
Marshalltown
Melbourne
Rhodes
St. Anthony
State Center
Climate data from the nearest NOAA station, Marshalltown, Ia (8.6 mi from Le Grand). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.