Harman US

Shellsburg, IA Weather & Growing Conditions

Overnight
67°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 4am, then patchy fog and occasional showers and thunderstorms. Cloudy, with a low around 67. East wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Overnight 67°F Chance Showers And Thunderstorms 5 to 10 mph E 79%
Saturday 80°F Patchy Fog 5 to 10 mph S 81%
Saturday Night 62°F Showers And Thunderstorms Likely 5 to 10 mph N 67%
Sunday 68°F Chance Rain Showers 10 to 15 mph NE 52%
Sunday Night 55°F Chance Rain Showers 10 to 15 mph NE 46%
Monday 64°F Chance Rain Showers 15 mph NE 46%
Monday Night 50°F Chance Rain Showers 10 mph NE 35%
Tuesday 62°F Chance Rain Showers then Partly Sunny 10 mph NE 28%
Tuesday Night 46°F Mostly Clear 5 to 10 mph NE 5%
Wednesday 66°F Sunny 5 mph NE 0%
Wednesday Night 50°F Partly Cloudy 5 mph NE 2%
Thursday 67°F Mostly Sunny 5 mph E 8%
Thursday Night 53°F Partly Cloudy 0 to 5 mph E 6%
Friday 70°F Mostly Sunny 5 mph E 6%

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

Growing snapshot for Shellsburg, IA

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

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

Climate data from the nearest NOAA station, Vinton, Ia (7.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.