The official National Weather Service forecast for Lone Tree — 39.5517°N, 104.8863°W, 1.2 miles from I-25. Forecasts here are written by NWS BOU, this county’s forecast office.
| Douglas County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 44 | 44 | 52 | 58 | 66 | 79 | 84 | 81 | 75 | 63 | 52 | 44 | 62 |
| Avg low °F | 16 | 17 | 24 | 30 | 39 | 49 | 55 | 53 | 45 | 34 | 24 | 17 | 34 |
| Precip in | 0.7 | 0.9 | 1.5 | 2.2 | 2.4 | 1.8 | 2.6 | 2.2 | 1.5 | 1.1 | 0.7 | 0.8 | 18.4 |
1996–2025 normals for Douglas County — the climate division Lone Tree sits in. All-time county record high 96.9°F (1994-06-27); record low -30.8°F (1963-01-12). Source: NOAA / National Weather Service.