The official National Weather Service forecast for Silverton — 45.0051°N, 122.7832°W, population 10,909, 9.8 miles from I-5. Forecasts here are written by NWS PQR, this county’s forecast office.
| Marion County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 44 | 47 | 51 | 56 | 64 | 70 | 79 | 79 | 72 | 60 | 49 | 43 | 60 |
| Avg low °F | 33 | 33 | 35 | 37 | 43 | 47 | 52 | 52 | 48 | 42 | 36 | 33 | 41 |
| Precip in | 9.4 | 7.0 | 7.6 | 5.3 | 3.9 | 2.4 | 0.4 | 0.7 | 2.4 | 5.7 | 9.0 | 11.0 | 64.8 |
1996–2025 normals for Marion County — the climate division Silverton sits in. All-time county record high 104.9°F (2021-06-29); record low 1.1°F (1990-12-21). Source: NOAA / National Weather Service.