The official National Weather Service forecast for Marion — 35.684°N, 82.0093°W, population 12,031, 3 miles from I-40. Forecasts here are written by NWS GSP, this county’s forecast office.
| McDowell County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 49 | 53 | 61 | 70 | 77 | 83 | 86 | 85 | 79 | 69 | 60 | 52 | 69 |
| Avg low °F | 27 | 31 | 37 | 44 | 52 | 60 | 64 | 63 | 57 | 46 | 36 | 30 | 46 |
| Precip in | 4.4 | 3.8 | 4.4 | 4.8 | 5.2 | 4.5 | 5.3 | 5.3 | 5.6 | 4.2 | 4.0 | 4.7 | 56.2 |
1996–2025 normals for McDowell County — the climate division Marion sits in. All-time county record high 100.0°F (1952-07-29); record low -12.6°F (1985-01-22). Source: NOAA / National Weather Service.