Le Mars, IA Weather & Growing Conditions
Tonight
39°F
Rain Showers
Rain showers. Cloudy. Low around 39, with temperatures rising to around 43 overnight. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 39°F | Rain Showers | 15 mph NW | 92% |
| Wednesday | 48°F | Chance Rain Showers | 15 mph WNW | 49% |
| Wednesday Night | 38°F | Chance Rain Showers | 10 to 15 mph NW | 39% |
| Thursday | 48°F | Mostly Cloudy | 10 to 15 mph NNW | 6% |
| Thursday Night | 32°F | Mostly Cloudy | 0 to 10 mph N | 0% |
| Friday | 48°F | Mostly Sunny | 0 mph | 0% |
| Friday Night | 30°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph SSW | 0% |
| Saturday Night | 35°F | Mostly Clear | 0 to 5 mph W | 5% |
| Sunday | 60°F | Sunny | 0 to 5 mph WSW | 3% |
| Sunday Night | 38°F | Mostly Clear | 5 mph S | 0% |
| Monday | 63°F | Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 38°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Tuesday | 60°F | Mostly Sunny | 0 to 5 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Le Mars, IA
Last spring frost
Apr 30
First fall frost
Oct 4
Growing season
157 days
Hardiness zone
5a
Explore more for Le Mars, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Le Mars, Ia (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.