The official National Weather Service forecast for Wilsonville — 45.2998°N, 122.7737°W, 1.3 miles from I-5. Forecasts here are written by NWS PQR, this county’s forecast office.
| Clackamas County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 45 | 49 | 54 | 61 | 68 | 77 | 77 | 70 | 58 | 47 | 42 | 58 |
| Avg low °F | 32 | 31 | 34 | 36 | 42 | 47 | 52 | 52 | 48 | 41 | 36 | 32 | 40 |
| Precip in | 10.5 | 7.9 | 8.7 | 6.2 | 4.7 | 3.0 | 0.5 | 0.9 | 2.7 | 6.7 | 10.2 | 12.3 | 74.3 |
1996–2025 normals for Clackamas County — the climate division Wilsonville sits in. All-time county record high 104.5°F (2021-06-29); record low -1.8°F (1989-02-04). Source: NOAA / National Weather Service.