Grenora, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grenora, a city in Williams County, North Dakota.
Overnight
55°F
Slight Chance Rain Showers
A slight chance of rain showers before 1am, then patchy drizzle and patchy fog. Cloudy. Low around 55, with temperatures rising to around 57 overnight. Northeast wind around 13 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
7-day forecast for Grenora
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Slight Chance Rain Showers | 13 mph NE | 21% |
| Saturday | 66°F | Patchy Fog then Mostly Cloudy | 13 to 18 mph NE | 8% |
| Saturday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 13 to 17 mph E | 21% |
| Sunday | 62°F | Slight Chance Rain Showers | 14 mph E | 22% |
| Sunday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 9 to 13 mph SE | 18% |
| Monday | 69°F | Mostly Sunny | 9 to 18 mph SE | 2% |
| Monday Night | 50°F | Partly Cloudy | 17 mph SE | 0% |
| Tuesday | 73°F | Mostly Sunny | 16 to 21 mph SE | 1% |
| Tuesday Night | 53°F | Partly Cloudy | 14 to 18 mph SE | 4% |
| Wednesday | 76°F | Mostly Sunny | 14 mph S | 9% |
| Wednesday Night | 53°F | Mostly Clear | 10 mph S | 10% |
| Thursday | 78°F | Sunny | 7 to 12 mph SE | 4% |
| Thursday Night | 55°F | Mostly Clear | 9 to 13 mph SE | 4% |
| Friday | 77°F | Mostly Sunny | 13 to 20 mph SE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Grenora (48.620, -103.937). Updated through the day.
Growing snapshot for Grenora
Last spring frost
May 18
First fall frost
Sep 21
Growing season
125 days
Hardiness zone
3b
More local growing data for Grenora: nearby ZIP 58845 weather · frost dates · planting calendar · North Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Westby, Mt (17.2 mi from Grenora). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.