The official National Weather Service forecast for Terry — 46.7931°N, 105.3122°W, 1.1 miles from I-94.
| Prairie County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 29 | 32 | 45 | 57 | 67 | 77 | 88 | 86 | 75 | 58 | 43 | 31 | 57 |
| Avg low °F | 8 | 10 | 20 | 30 | 41 | 50 | 57 | 55 | 45 | 32 | 20 | 10 | 32 |
| Precip in | 0.3 | 0.3 | 0.4 | 1.2 | 2.7 | 2.5 | 1.9 | 1.2 | 1.2 | 1.1 | 0.4 | 0.4 | 13.6 |
1996–2025 normals for Prairie County — the climate division Terry sits in. All-time county record high 112.7°F (2026-07-13); record low -40.5°F (1954-01-20). Source: NOAA / National Weather Service.