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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.