Granger, IA Weather & Growing Conditions
Overnight
68°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South southeast wind around 7 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 | 68°F | Chance Showers And Thunderstorms | 7 mph SSE | 50% |
| Saturday | 80°F | Chance Showers And Thunderstorms | 8 mph W | 46% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms | 8 mph N | 36% |
| Sunday | 67°F | Chance Showers And Thunderstorms | 9 to 13 mph NNE | 52% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 12 mph ENE | 52% |
| Monday | 60°F | Rain Showers Likely | 13 mph ENE | 64% |
| Monday Night | 53°F | Rain Showers Likely | 7 to 10 mph NE | 59% |
| Tuesday | 60°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph NE | 15% |
| Tuesday Night | 49°F | Partly Cloudy | 2 to 7 mph ENE | 2% |
| Wednesday | 64°F | Mostly Sunny | 5 mph E | 3% |
| Wednesday Night | 53°F | Partly Cloudy | 3 mph ESE | 5% |
| Thursday | 67°F | Slight Chance Rain Showers | 1 to 5 mph SE | 20% |
| Thursday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 3 mph SE | 15% |
| Friday | 67°F | Slight Chance Rain Showers | 2 to 6 mph E | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Granger, IA
Last spring frost
Apr 19
First fall frost
Oct 18
Growing season
179 days
Hardiness zone
5b
Explore more for Granger, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Des Moines Wsfo-Johnston, Ia (4.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.