The official National Weather Service forecast for Buffalo — 44.3483°N, 106.6989°W, population 4,516, 1.3 miles from I-25.
| Johnson County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 36 | 46 | 53 | 62 | 74 | 84 | 82 | 72 | 57 | 45 | 35 | 57 |
| Avg low °F | 13 | 14 | 22 | 28 | 38 | 47 | 54 | 52 | 43 | 32 | 22 | 14 | 32 |
| Precip in | 0.5 | 0.7 | 1.0 | 1.8 | 2.9 | 1.9 | 1.3 | 1.0 | 1.2 | 1.5 | 0.6 | 0.6 | 15.0 |
1996–2025 normals for Johnson County — the climate division Buffalo sits in. All-time county record high 101.2°F (2026-07-13); record low -38.0°F (1983-12-24). Source: NOAA / National Weather Service.