Granville, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Granville, a city in O'brien County, Iowa.
Today
71°F
Patchy Smoke
Patchy smoke and scattered rain showers before 10am, then patchy smoke and showers and thunderstorms between 10am and 5pm, then patchy smoke and scattered showers and thunderstorms. Mostly cloudy, with a high near 71. North wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Granville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Patchy Smoke | 5 to 10 mph N | 82% |
| Tonight | 54°F | Patchy Smoke then Mostly Cloudy | 0 to 5 mph NNW | 50% |
| Wednesday | 75°F | Mostly Sunny | 0 to 5 mph ESE | 1% |
| Wednesday Night | 53°F | Mostly Clear | 5 mph SSE | 0% |
| Thursday | 81°F | Sunny | 5 to 10 mph S | 0% |
| Thursday Night | 61°F | Mostly Clear | 5 to 10 mph S | 3% |
| Friday | 86°F | Sunny | 5 to 15 mph SSW | 4% |
| Friday Night | 64°F | Mostly Clear | 5 to 10 mph S | 12% |
| Saturday | 89°F | Sunny | 5 to 15 mph S | 5% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SSE | 21% |
| Sunday | 88°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SE | 16% |
| Sunday Night | 67°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 to 15 mph ESE | 19% |
| Monday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph E | 19% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 15 mph ENE | 27% |
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 Aug 4, 2026.