The official National Weather Service forecast for Jamestown — 35.9943°N, 79.9353°W, 2.3 miles from I-74. Forecasts here are written by NWS RAH, this county’s forecast office.
| Guilford County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 50 | 54 | 62 | 71 | 78 | 85 | 88 | 87 | 81 | 71 | 61 | 53 | 70 |
| Avg low °F | 29 | 32 | 39 | 46 | 55 | 64 | 68 | 67 | 60 | 48 | 38 | 33 | 48 |
| Precip in | 3.7 | 3.1 | 3.7 | 3.7 | 4.0 | 4.0 | 4.6 | 4.5 | 4.9 | 3.1 | 3.1 | 3.6 | 46.0 |
1996–2025 normals for Guilford County — the climate division Jamestown sits in. All-time county record high 102.1°F (1952-07-29); record low -8.3°F (1985-01-21). Source: NOAA / National Weather Service.