The official National Weather Service forecast for New Market — 36.104°N, 83.5527°W, 7.8 miles from I-40.
| Jefferson County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 48 | 53 | 62 | 71 | 79 | 85 | 88 | 87 | 82 | 72 | 61 | 51 | 70 |
| Avg low °F | 28 | 32 | 38 | 46 | 55 | 63 | 67 | 66 | 60 | 48 | 37 | 32 | 48 |
| Precip in | 4.3 | 4.5 | 4.6 | 4.2 | 4.0 | 4.1 | 4.6 | 3.7 | 3.6 | 2.9 | 3.4 | 4.4 | 48.3 |
1996–2025 normals for Jefferson County — the climate division New Market sits in. All-time county record high 103.8°F (2012-07-01); record low -15.5°F (1985-01-21). Source: NOAA / National Weather Service.