Grannis, AR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grannis, a city in Polk County, Arkansas.
Overnight
47°F
Mostly Clear
Mostly clear. Low around 47, with temperatures rising to around 51 overnight. Northwest wind around 5 mph.
7-day forecast for Grannis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Mostly Clear | 5 mph NW | 0% |
| Wednesday | 70°F | Sunny | 0 to 5 mph WNW | 0% |
| Wednesday Night | 42°F | Partly Cloudy | 0 mph | 0% |
| Thursday | 71°F | Sunny | 0 to 5 mph S | 0% |
| Thursday Night | 48°F | Partly Cloudy | 0 to 5 mph N | 2% |
| Friday | 67°F | Sunny | 5 mph N | 0% |
| Friday Night | 41°F | Partly Cloudy | 0 to 5 mph NNE | 0% |
| Saturday | 64°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Saturday Night | 39°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Sunday | 66°F | Mostly Sunny | 0 to 5 mph NNW | 0% |
| Sunday Night | 38°F | Mostly Clear | 0 mph | 0% |
| Monday | 67°F | Sunny | 0 to 5 mph SW | 2% |
| Monday Night | 39°F | Mostly Clear | 0 mph | 1% |
| Tuesday | 70°F | Sunny | 0 to 5 mph SSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Grannis (34.240, -94.322). Updated through the day.
Growing snapshot for Grannis
Last spring frost
Mar 29
First fall frost
Nov 5
Growing season
222 days
Hardiness zone
8a
More local growing data for Grannis: nearby ZIP 71944 weather · frost dates · planting calendar · Arkansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Dequeen, Ar (13.5 mi from Grannis). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.