Grand Junction, IA Weather & Growing Conditions
Tonight
43°F
Rain Showers
Rain showers before 5am. Cloudy. Low around 43, with temperatures rising to around 46 overnight. Northwest wind 10 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 43°F | Rain Showers | 10 to 15 mph NW | 75% |
| Wednesday | 51°F | Chance Rain Showers | 14 mph W | 28% |
| Wednesday Night | 41°F | Cloudy then Chance Rain Showers | 8 to 12 mph W | 43% |
| Thursday | 52°F | Rain Showers Likely | 10 mph NW | 58% |
| Thursday Night | 37°F | Mostly Cloudy | 5 to 8 mph N | 12% |
| Friday | 52°F | Partly Sunny | 5 mph N | 1% |
| Friday Night | 32°F | Partly Cloudy | 1 mph NW | 0% |
| Saturday | 57°F | Mostly Sunny | 3 mph WSW | 1% |
| Saturday Night | 36°F | Mostly Clear | 3 mph W | 4% |
| Sunday | 62°F | Sunny | 5 mph W | 5% |
| Sunday Night | 38°F | Mostly Clear | 3 mph SW | 1% |
| Monday | 65°F | Sunny | 3 to 9 mph WSW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 63°F | Mostly Sunny | 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grand Junction, IA
Last spring frost
Apr 26
First fall frost
Oct 9
Growing season
164 days
Hardiness zone
5a
Explore more for Grand Junction, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Jefferson, Ia (9.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.