Granville, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Granville, a city in O'brien County, Iowa.
Overnight
40°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 40, with temperatures rising to around 43 overnight. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Granville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 40°F | Chance Rain Showers | 15 mph NW | 47% |
| Wednesday | 46°F | Rain Showers Likely | 15 to 20 mph WNW | 55% |
| Wednesday Night | 38°F | Chance Rain Showers | 10 to 15 mph NW | 45% |
| Thursday | 46°F | Mostly Cloudy | 10 to 15 mph NNW | 8% |
| Thursday Night | 32°F | Mostly Cloudy | 5 to 10 mph N | 0% |
| Friday | 46°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Friday Night | 29°F | Partly Cloudy | 0 to 5 mph SE | 0% |
| Saturday | 50°F | Mostly Sunny | 5 mph SSW | 1% |
| Saturday Night | 34°F | Mostly Clear | 5 mph WSW | 0% |
| Sunday | 55°F | Sunny | 5 mph WSW | 0% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SSW | 0% |
| Monday | 60°F | Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 mph NW | 0% |
| Tuesday | 58°F | Mostly Sunny | 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Granville (42.985, -95.875). Updated through the day.
Growing snapshot for Granville
Last spring frost
Apr 29
First fall frost
Oct 10
Growing season
163 days
Hardiness zone
5a
More local growing data for Granville: nearby ZIP 51022 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Primghar, Ia (13.3 mi from Granville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.