Grand Junction, IA Weather & Growing Conditions
Overnight
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. Low around 66, with temperatures rising to around 68 overnight. South southwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Chance Showers And Thunderstorms | 5 mph SSW | 49% |
| Saturday | 79°F | Chance Showers And Thunderstorms | 7 mph WNW | 46% |
| Saturday Night | 60°F | Slight Chance Showers And Thunderstorms then Chance Rain Showers | 8 mph N | 27% |
| Sunday | 66°F | Slight Chance Rain Showers then Chance Drizzle | 12 mph NNE | 41% |
| Sunday Night | 55°F | Chance Rain Showers | 10 mph ENE | 49% |
| Monday | 62°F | Rain Showers Likely | 9 mph ENE | 57% |
| Monday Night | 50°F | Rain Showers Likely | 5 to 8 mph NE | 57% |
| Tuesday | 61°F | Partly Sunny | 7 mph ENE | 8% |
| Tuesday Night | 45°F | Partly Cloudy | 1 to 5 mph E | 1% |
| Wednesday | 66°F | Mostly Sunny | 3 mph ESE | 1% |
| Wednesday Night | 50°F | Partly Cloudy | 2 mph ESE | 8% |
| Thursday | 67°F | Slight Chance Rain Showers | 1 to 5 mph SE | 18% |
| Thursday Night | 53°F | Mostly Cloudy | 2 mph ESE | 9% |
| Friday | 69°F | Partly Sunny | 2 to 6 mph ESE | 9% |
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 Sep 19, 2026.