Granville, IA Weather & Growing Conditions
Tonight
63°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1am, then patchy fog and a chance of showers and thunderstorms between 1am and 4am, then areas of fog and a chance of showers and thunderstorms between 4am and 5am, then patchy fog and a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. North northeast wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 63°F | Chance Showers And Thunderstorms | 5 to 10 mph NNE | 34% |
| Saturday | 70°F | Patchy Fog | 5 to 10 mph N | 23% |
| Saturday Night | 57°F | Slight Chance Rain Showers then Cloudy | 10 mph NNE | 16% |
| Sunday | 64°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 | 61% |
| Monday | 58°F | Rain Showers Likely | 10 mph ENE | 61% |
| Monday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph ENE | 39% |
| Tuesday | 60°F | Partly Sunny | 5 to 10 mph E | 10% |
| 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 | 31% |
| Thursday | 67°F | Chance Rain Showers | 5 mph SSE | 31% |
| 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). Updated through the day.
Growing snapshot for Granville, IA
Last spring frost
Apr 29
First fall frost
Oct 10
Growing season
163 days
Hardiness zone
5a
Explore more for Granville, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Primghar, Ia (13.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.