The official National Weather Service forecast for Flower Mound — 33.0146°N, 97.097°W, 5.8 miles from I-635. Forecasts here are written by NWS FWD, this county’s forecast office.
| Denton County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 56 | 60 | 68 | 75 | 83 | 91 | 96 | 96 | 89 | 78 | 67 | 58 | 76 |
| Avg low °F | 34 | 38 | 46 | 53 | 63 | 71 | 75 | 74 | 67 | 56 | 45 | 37 | 55 |
| Precip in | 2.1 | 2.6 | 3.6 | 3.6 | 4.9 | 3.9 | 2.0 | 2.4 | 2.7 | 4.2 | 2.8 | 2.4 | 37.2 |
1996–2025 normals for Denton County — the climate division Flower Mound sits in. All-time county record high 110.5°F (1980-06-28); record low -1.8°F (1989-12-23). Source: NOAA / National Weather Service.