The official National Weather Service forecast for Cooperstown — 47.4444°N, 98.124°W, 37.3 miles from I-94.
| Griggs County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 17 | 21 | 35 | 51 | 66 | 76 | 81 | 79 | 71 | 55 | 37 | 22 | 51 |
| Avg low °F | -1 | 1 | 15 | 29 | 42 | 53 | 58 | 55 | 46 | 33 | 19 | 5 | 30 |
| Precip in | 0.4 | 0.4 | 0.7 | 1.4 | 3.0 | 3.6 | 3.1 | 2.6 | 2.1 | 1.8 | 0.6 | 0.7 | 20.4 |
1996–2025 normals for Griggs County — the climate division Cooperstown sits in. All-time county record high 103.9°F (1983-08-08); record low -39.1°F (1996-02-01). Source: NOAA / National Weather Service.