The official National Weather Service forecast for Kewaunee — 44.4583°N, 87.5031°W, 17.3 miles from I-43. Forecasts here are written by NWS GRB, this county’s forecast office.
| Kewaunee County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 26 | 30 | 40 | 52 | 64 | 74 | 79 | 77 | 71 | 58 | 44 | 32 | 54 |
| Avg low °F | 12 | 13 | 23 | 33 | 43 | 54 | 59 | 58 | 51 | 40 | 29 | 19 | 36 |
| Precip in | 1.5 | 1.2 | 2.1 | 2.9 | 3.6 | 4.1 | 3.3 | 3.5 | 2.7 | 3.0 | 2.0 | 1.8 | 31.7 |
1996–2025 normals for Kewaunee County — the climate division Kewaunee sits in. All-time county record high 96.3°F (2012-07-17); record low -28.6°F (1996-02-03). Source: NOAA / National Weather Service.