The official National Weather Service forecast for Wilton — 41.5889°N, 91.0168°W, 6.8 miles from I-80.
| Muscatine County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 35 | 49 | 62 | 72 | 82 | 85 | 83 | 77 | 64 | 49 | 36 | 60 |
| Avg low °F | 14 | 17 | 29 | 39 | 51 | 61 | 64 | 62 | 54 | 42 | 30 | 20 | 40 |
| Precip in | 1.3 | 1.6 | 2.3 | 3.6 | 4.8 | 5.1 | 4.1 | 3.9 | 3.3 | 3.0 | 1.8 | 1.8 | 36.6 |
1996–2025 normals for Muscatine County — the climate division Wilton sits in. All-time county record high 103.7°F (2012-07-24); record low -30.5°F (2019-01-31). Source: NOAA / National Weather Service.