The official National Weather Service forecast for Glenrock — 42.8614°N, 105.8722°W, 1.7 miles from I-25.
| Converse County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 37 | 47 | 55 | 64 | 77 | 86 | 84 | 75 | 59 | 46 | 36 | 58 |
| Avg low °F | 14 | 14 | 22 | 29 | 38 | 47 | 55 | 52 | 43 | 31 | 22 | 14 | 32 |
| Precip in | 0.5 | 0.7 | 1.0 | 1.8 | 2.5 | 1.6 | 1.4 | 1.1 | 1.1 | 1.2 | 0.6 | 0.5 | 14.0 |
1996–2025 normals for Converse County — the climate division Glenrock sits in. All-time county record high 101.5°F (1954-07-12); record low -35.3°F (1990-12-22). Source: NOAA / National Weather Service.