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Little Sioux, IA Weather & Growing Conditions

This Afternoon
75°F
Slight Chance Showers And Thunderstorms
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly cloudy. High near 75, with temperatures falling to around 72 in the afternoon. North northwest wind around 9 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 75°F Slight Chance Showers And Thunderstorms 9 mph NNW 17%
Tonight 59°F Cloudy 10 mph N 14%
Sunday 63°F Rain Showers Likely 12 mph NNE 57%
Sunday Night 55°F Rain Showers Likely 6 to 9 mph NE 73%
Monday 58°F Rain Showers 9 mph NE 79%
Monday Night 50°F Chance Rain Showers then Mostly Cloudy 3 to 8 mph NE 29%
Tuesday 61°F Partly Sunny 6 mph NE 3%
Tuesday Night 47°F Partly Cloudy 5 mph E 1%
Wednesday 65°F Partly Sunny 3 to 7 mph SE 4%
Wednesday Night 52°F Mostly Cloudy then Chance Showers And Thunderstorms 7 mph SE 27%
Thursday 67°F Chance Showers And Thunderstorms 6 to 9 mph SSE 39%
Thursday Night 56°F Slight Chance Rain Showers then Mostly Cloudy 6 mph SE 18%
Friday 69°F Slight Chance Rain Showers 3 to 7 mph ESE 19%
Friday Night 57°F Mostly Cloudy then Chance Rain Showers 7 mph SE 28%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Little Sioux, IA

Last spring frost
May 1
First fall frost
Oct 3
Growing season
155 days
Hardiness zone
5a

Explore more for Little Sioux, IA: full frost dates · planting calendar · Iowa frost dates

Climate data from the nearest NOAA station, Little Sioux 2 Nw, Ia (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.