Blue Grass, IA Weather & Growing Conditions
Today
87°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5pm. Mostly sunny. High near 87, with temperatures falling to around 85 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Tonight | 68°F | Showers And Thunderstorms Likely | 5 mph N | 82% |
| Wednesday | 79°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph NE | 79% |
| Wednesday Night | 63°F | Showers And Thunderstorms Likely | 5 mph N | 71% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 5 mph NE | 44% |
| Thursday Night | 63°F | Mostly Clear | 0 to 5 mph E | 7% |
| Friday | 83°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 66°F | Mostly Clear | 0 to 5 mph S | 11% |
| Saturday | 86°F | Sunny | 5 mph S | 9% |
| Saturday Night | 71°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 17% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph SW | 17% |
| Sunday Night | 71°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 33% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 33% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 10 mph SE | 33% |
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 Aug 4, 2026.