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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
Alleman
Altoona
Ankeny
Bondurant
Clive
Des Moines
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Grimes
Johnston
Maxwell
Mitchellville
Pleasant Hill
Polk City
Runnells
Saylorville
Sheldahl
Slater
Urbandale
West Des Moines
Windsor Heights
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.