The official National Weather Service forecast for Andover — 37.7139°N, 97.1364°W, 10.6 miles from I-235.
| Butler County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 47 | 59 | 68 | 76 | 86 | 91 | 90 | 83 | 71 | 58 | 46 | 68 |
| Avg low °F | 22 | 25 | 35 | 44 | 54 | 64 | 69 | 67 | 59 | 47 | 35 | 25 | 46 |
| Precip in | 1.0 | 1.4 | 2.5 | 3.2 | 5.6 | 5.4 | 3.8 | 4.0 | 3.4 | 3.3 | 1.8 | 1.3 | 36.7 |
1996–2025 normals for Butler County — the climate division Andover sits in. All-time county record high 113.0°F (1954-07-14); record low -17.2°F (1989-12-22). Source: NOAA / National Weather Service.