The official National Weather Service forecast for Williamston — 35.8546°N, 77.0555°W, population 5,522, 27.2 miles from I-587. Forecasts here are written by NWS MHX, this county’s forecast office.
| Martin County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 53 | 57 | 64 | 73 | 80 | 86 | 89 | 88 | 82 | 74 | 64 | 56 | 72 |
| Avg low °F | 32 | 35 | 40 | 49 | 57 | 66 | 70 | 68 | 63 | 51 | 41 | 35 | 51 |
| Precip in | 3.6 | 3.4 | 3.7 | 3.7 | 4.0 | 4.7 | 5.8 | 5.7 | 6.2 | 3.4 | 3.2 | 3.6 | 51.0 |
1996–2025 normals for Martin County — the climate division Williamston sits in. All-time county record high 103.2°F (1952-06-27); record low -4.6°F (1985-01-21). Source: NOAA / National Weather Service.