Granville, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Granville, a city in O'brien County, Iowa.
Overnight
63°F
Areas Of Fog
Areas of fog before 5am, then areas of fog and a slight chance of showers and thunderstorms. Cloudy. Low around 63, with temperatures rising to around 67 overnight. North wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Granville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Areas Of Fog | 5 mph N | 21% |
| Saturday | 69°F | Areas Of Fog then Cloudy | 5 to 10 mph N | 34% |
| Saturday Night | 56°F | Cloudy | 10 mph NNE | 12% |
| Sunday | 65°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 24% |
| Sunday Night | 53°F | Rain Showers Likely | 10 to 15 mph ENE | 57% |
| Monday | 59°F | Rain Showers Likely | 10 mph ENE | 57% |
| Monday Night | 47°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph ENE | 41% |
| Tuesday | 61°F | Partly Sunny | 5 to 10 mph E | 4% |
| Tuesday Night | 46°F | Partly Cloudy | 5 mph ESE | 0% |
| Wednesday | 65°F | Mostly Sunny | 5 to 10 mph SE | 6% |
| Wednesday Night | 51°F | Mostly Cloudy then Chance Rain Showers | 5 mph SE | 32% |
| Thursday | 67°F | Chance Rain Showers | 5 mph SSE | 32% |
| Thursday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph SSE | 16% |
| Friday | 68°F | Slight Chance Rain Showers then Partly Sunny | 5 to 10 mph SE | 16% |
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 Sep 19, 2026.