The official National Weather Service forecast for Columbus — 45.6366°N, 109.2521°W, 1.5 miles from I-90.
| Stillwater County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 36 | 46 | 53 | 62 | 72 | 83 | 81 | 71 | 56 | 44 | 35 | 56 |
| Avg low °F | 15 | 15 | 22 | 29 | 38 | 46 | 52 | 51 | 43 | 33 | 23 | 16 | 32 |
| Precip in | 0.8 | 1.1 | 1.2 | 1.9 | 3.1 | 2.5 | 1.3 | 1.2 | 1.4 | 1.7 | 0.9 | 0.9 | 18.0 |
1996–2025 normals for Stillwater County — the climate division Columbus sits in. All-time county record high 105.8°F (2026-07-13); record low -36.0°F (1983-12-25). Source: NOAA / National Weather Service.