The official National Weather Service forecast for Wahpeton — 46.2652°N, 96.6059°W, population 11,290, 20.5 miles from I-29.
| Richland County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 20 | 24 | 38 | 54 | 69 | 79 | 83 | 81 | 73 | 57 | 40 | 26 | 54 |
| Avg low °F | 2 | 5 | 19 | 32 | 45 | 56 | 60 | 57 | 49 | 36 | 22 | 9 | 33 |
| Precip in | 0.6 | 0.6 | 1.0 | 2.0 | 3.1 | 3.8 | 3.2 | 3.1 | 2.6 | 2.3 | 0.8 | 0.9 | 24.0 |
1996–2025 normals for Richland County — the climate division Wahpeton sits in. All-time county record high 104.9°F (1988-07-06); record low -36.7°F (1994-02-09). Source: NOAA / National Weather Service.