St. Thomas, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Thomas, a city in Pembina County, North Dakota.
Tonight
32°F
Cloudy
Cloudy. Low around 32, with temperatures rising to around 35 overnight. North wind 12 to 15 mph.
7-day forecast for St. Thomas
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 32°F | Cloudy | 12 to 15 mph N | 0% |
| Wednesday | 48°F | Mostly Cloudy | 16 to 21 mph N | 0% |
| Wednesday Night | 29°F | Mostly Cloudy | 16 to 20 mph N | 0% |
| Thursday | 40°F | Partly Sunny | 6 to 20 mph N | 0% |
| Thursday Night | 20°F | Partly Cloudy | 3 mph SE | 0% |
| Friday | 46°F | Mostly Sunny | 5 to 14 mph S | 0% |
| Friday Night | 27°F | Partly Cloudy | 10 mph S | 0% |
| Saturday | 55°F | Mostly Sunny | 9 to 15 mph WSW | 11% |
| Saturday Night | 32°F | Partly Cloudy | 8 to 12 mph WNW | 6% |
| Sunday | 54°F | Mostly Sunny | 10 mph SW | 1% |
| Sunday Night | 35°F | Mostly Cloudy | 9 to 14 mph SSW | 0% |
| Monday | 56°F | Mostly Sunny | 15 to 23 mph W | 0% |
| Monday Night | 31°F | Partly Cloudy | 6 to 14 mph W | 0% |
| Tuesday | 51°F | Mostly Sunny | 6 to 10 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for St. Thomas (48.619, -97.447). Updated through the day.
Growing snapshot for St. Thomas
Last spring frost
May 4
First fall frost
Oct 7
Growing season
156 days
Hardiness zone
4a
More local growing data for St. Thomas: nearby ZIP 58276 weather · frost dates · planting calendar · North Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Grafton, Nd (14.3 mi from St. Thomas). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.