The official National Weather Service forecast for Benton — 35.1742°N, 84.6535°W, 12.4 miles from I-75.
| Polk County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 49 | 54 | 62 | 71 | 78 | 85 | 87 | 87 | 82 | 72 | 61 | 53 | 70 |
| Avg low °F | 29 | 32 | 39 | 45 | 55 | 62 | 66 | 65 | 59 | 48 | 37 | 32 | 47 |
| Precip in | 5.1 | 5.2 | 5.3 | 5.0 | 4.7 | 5.1 | 4.9 | 4.6 | 4.4 | 3.2 | 4.4 | 5.5 | 57.4 |
1996–2025 normals for Polk County — the climate division Benton sits in. All-time county record high 102.8°F (2012-07-01); record low -12.3°F (1985-01-21). Source: NOAA / National Weather Service.