The official National Weather Service forecast for New Union — 35.5326°N, 86.0808°W, 2.5 miles from I-24.
| Coffee County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 48 | 53 | 62 | 71 | 78 | 85 | 87 | 87 | 82 | 72 | 61 | 52 | 70 |
| Avg low °F | 28 | 32 | 38 | 45 | 55 | 63 | 67 | 65 | 58 | 47 | 37 | 32 | 47 |
| Precip in | 5.4 | 5.3 | 5.7 | 5.2 | 5.1 | 5.0 | 4.9 | 4.3 | 4.3 | 3.4 | 4.1 | 5.7 | 58.4 |
1996–2025 normals for Coffee County — the climate division New Union sits in. All-time county record high 105.8°F (2012-06-30); record low -18.2°F (1985-01-21). Source: NOAA / National Weather Service.