Le Mars, IA Weather & Growing Conditions
Overnight
64°F
Areas Of Fog
Areas of fog before 4am, then areas of fog and a slight chance of showers and thunderstorms. Cloudy. Low around 64, with temperatures rising to around 68 overnight. North northwest wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Areas Of Fog | 0 to 5 mph NNW | 23% |
| Saturday | 70°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph N | 33% |
| Saturday Night | 57°F | Cloudy | 10 mph NNE | 11% |
| Sunday | 65°F | Chance Rain Showers | 10 to 15 mph NE | 29% |
| Sunday Night | 53°F | Rain Showers Likely | 5 to 10 mph ENE | 58% |
| Monday | 61°F | Rain Showers Likely | 5 to 10 mph ENE | 59% |
| Monday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph ENE | 41% |
| Tuesday | 62°F | Mostly Cloudy | 5 mph E | 4% |
| Tuesday Night | 47°F | Partly Cloudy | 0 to 5 mph ESE | 0% |
| Wednesday | 66°F | Mostly Sunny | 0 to 10 mph SE | 8% |
| Wednesday Night | 52°F | Mostly Cloudy then Chance Rain Showers | 5 mph SE | 33% |
| Thursday | 67°F | Chance Rain Showers | 5 to 10 mph SSE | 33% |
| Thursday Night | 54°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph SE | 18% |
| Friday | 69°F | Slight Chance Rain Showers then Partly Sunny | 0 to 10 mph SE | 18% |
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 Sep 19, 2026.