Harman US

Blue Grass, IA Weather & Growing Conditions

This Afternoon
80°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 80. South wind 5 to 10 mph. Chance of precipitation is 50%.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 80°F Chance Showers And Thunderstorms 5 to 10 mph S 52%
Tonight 66°F Chance Showers And Thunderstorms then Showers And Thunderstorms 5 mph SE 90%
Sunday 68°F Showers And Thunderstorms 5 to 15 mph NE 77%
Sunday Night 58°F Chance Rain Showers 10 to 15 mph NE 48%
Monday 63°F Rain Showers Likely 15 mph NE 68%
Monday Night 54°F Rain Showers Likely 10 mph NE 68%
Tuesday 62°F Rain Showers Likely 10 mph NE 56%
Tuesday Night 51°F Partly Cloudy 5 to 10 mph NE 6%
Wednesday 65°F Partly Sunny 5 to 10 mph NE 4%
Wednesday Night 53°F Partly Cloudy 0 to 5 mph NE 4%
Thursday 67°F Partly Sunny 0 to 5 mph NE 4%
Thursday Night 57°F Slight Chance Rain Showers 0 to 5 mph NE 18%
Friday 70°F Slight Chance Rain Showers then Partly Sunny 0 to 5 mph NE 15%
Friday Night 57°F Partly Cloudy 0 to 5 mph NE 8%

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

Growing snapshot for Blue Grass, IA

Last spring frost
Apr 19
First fall frost
Oct 22
Growing season
184 days
Hardiness zone
5b

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

Climate data from the nearest NOAA station, Rock Island L&D 15, Il (11.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.