Blue Grass, IA Weather & Growing Conditions
Tonight
52°F
Mostly Cloudy
Mostly cloudy. Low around 52, with temperatures rising to around 55 overnight. Southwest wind 10 to 15 mph. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Cloudy | 10 to 15 mph SW | 7% |
| Wednesday | 56°F | Chance Rain Showers then Mostly Cloudy | 15 mph SW | 25% |
| Wednesday Night | 46°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph SW | 15% |
| Thursday | 55°F | Rain Showers Likely | 10 to 15 mph W | 58% |
| Thursday Night | 42°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 15% |
| Friday | 50°F | Partly Sunny | 5 to 10 mph N | 6% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 35°F | Mostly Clear | 0 to 5 mph W | 2% |
| Sunday | 57°F | Sunny | 5 mph W | 2% |
| Sunday Night | 37°F | Clear | 0 to 5 mph W | 1% |
| Monday | 63°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 63°F | Sunny | 5 mph NW | 0% |
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 Nov 4, 2026.