Mercer, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mercer, a city in Mclean County, North Dakota.
This Afternoon
69°F
Patchy Drizzle
Patchy drizzle. Cloudy. High near 69, with temperatures falling to around 62 in the afternoon. Northeast wind around 10 mph.
7-day forecast for Mercer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Patchy Drizzle | 10 mph NE | 10% |
| Tonight | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 14 mph NE | 15% |
| Sunday | 65°F | Cloudy | 13 mph E | 7% |
| Sunday Night | 46°F | Mostly Cloudy | 6 to 9 mph E | 6% |
| Monday | 69°F | Mostly Sunny | 5 to 10 mph SE | 1% |
| Monday Night | 44°F | Mostly Clear | 9 mph SE | 1% |
| Tuesday | 69°F | Sunny | 9 to 21 mph SE | 1% |
| Tuesday Night | 50°F | Partly Cloudy | 17 mph S | 4% |
| Wednesday | 72°F | Partly Sunny then Slight Chance Rain Showers | 18 to 22 mph SE | 15% |
| Wednesday Night | 52°F | Chance Rain Showers | 9 to 17 mph SE | 42% |
| Thursday | 76°F | Chance Rain Showers then Partly Sunny | 12 mph S | 27% |
| Thursday Night | 53°F | Partly Cloudy | 6 to 9 mph S | 4% |
| Friday | 78°F | Mostly Sunny | 8 to 21 mph S | 5% |
| Friday Night | 56°F | Partly Cloudy then Slight Chance Rain Showers | 18 mph SE | 16% |
Forecast source: National Weather Service (api.weather.gov) for Mercer (47.491, -100.711). Updated through the day.
Growing snapshot for Mercer
Last spring frost
May 14
First fall frost
Sep 26
Growing season
136 days
Hardiness zone
4a
More local growing data for Mercer: nearby ZIP 58559 weather · frost dates · planting calendar · North Dakota frost dates
Nearby towns & communities
Benedict
Butte
Coleharbor
Garrison
Max
Pick City
Riverdale
Ruso
Ryder
Turtle Lake
Underwood
Washburn
White Shield
Climate data from the nearest NOAA station, Turtle Lake, Nd (9.7 mi from Mercer). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.