The official National Weather Service forecast for Blue Grass — 41.5089°N, 90.766°W, 7 miles from I-80.
| Scott County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 35 | 48 | 61 | 72 | 82 | 84 | 82 | 77 | 64 | 49 | 35 | 60 |
| Avg low °F | 14 | 18 | 29 | 39 | 51 | 61 | 64 | 62 | 55 | 43 | 31 | 20 | 41 |
| Precip in | 1.4 | 1.7 | 2.4 | 3.7 | 4.8 | 5.0 | 4.2 | 4.0 | 3.3 | 3.0 | 1.9 | 1.9 | 37.3 |
1996–2025 normals for Scott County — the climate division Blue Grass sits in. All-time county record high 101.2°F (1988-08-18); record low -29.7°F (2019-01-31). Source: NOAA / National Weather Service.