The official National Weather Service forecast for Smithville — 31.9004°N, 84.2519°W, 30 miles from I-75. Forecasts here are written by NWS TAE, this county’s forecast office.
| Lee County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 60 | 65 | 72 | 78 | 85 | 90 | 92 | 91 | 87 | 79 | 70 | 63 | 78 |
| Avg low °F | 37 | 41 | 47 | 53 | 61 | 69 | 72 | 71 | 66 | 55 | 45 | 40 | 55 |
| Precip in | 4.2 | 4.5 | 4.5 | 4.3 | 3.3 | 4.5 | 5.0 | 4.9 | 4.1 | 2.4 | 2.8 | 5.1 | 49.6 |
1996–2025 normals for Lee County — the climate division Smithville sits in. All-time county record high 103.6°F (1954-06-28); record low -0.1°F (1985-01-21). Source: NOAA / National Weather Service.