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Granger, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Granger, a city in Polk County, Iowa.

This Afternoon
84°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly cloudy. High near 84, with temperatures falling to around 78 in the afternoon. West northwest wind around 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Granger

WhenTempForecastWindPrecip
This Afternoon 84°F Slight Chance Showers And Thunderstorms 7 mph WNW 22%
Tonight 62°F Chance Showers And Thunderstorms 9 mph N 56%
Sunday 65°F Chance Rain Showers then Chance Drizzle 9 to 13 mph NE 39%
Sunday Night 56°F Rain Showers Likely 12 mph NE 68%
Monday 59°F Rain Showers 12 mph NE 84%
Monday Night 52°F Rain Showers Likely 7 to 10 mph NE 71%
Tuesday 60°F Slight Chance Rain Showers then Mostly Cloudy 8 mph NE 19%
Tuesday Night 48°F Partly Cloudy 2 to 7 mph ENE 2%
Wednesday 64°F Mostly Sunny 6 mph ENE 0%
Wednesday Night 52°F Partly Cloudy 3 mph ESE 8%
Thursday 67°F Slight Chance Rain Showers 2 to 6 mph SE 23%
Thursday Night 57°F Slight Chance Rain Showers 3 mph ESE 22%
Friday 69°F Slight Chance Rain Showers 2 to 6 mph ESE 20%
Friday Night 59°F Mostly Cloudy 5 mph ESE 11%

Forecast source: National Weather Service (api.weather.gov) for Granger (41.762, -93.824). Updated through the day.

Growing snapshot for Granger

Last spring frost
Apr 19
First fall frost
Oct 18
Growing season
179 days
Hardiness zone
5b

More local growing data for Granger: nearby ZIP 50109 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Des Moines Wsfo-Johnston, Ia (4.6 mi from Granger). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.