The official National Weather Service forecast for Saint Stephen — 33.4043°N, 79.9217°W, 26.3 miles from I-95. Forecasts here are written by NWS CHS, this county’s forecast office.
| Berkeley County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 59 | 63 | 70 | 77 | 84 | 89 | 92 | 90 | 86 | 78 | 69 | 62 | 77 |
| Avg low °F | 36 | 40 | 45 | 52 | 60 | 68 | 72 | 71 | 66 | 55 | 45 | 40 | 54 |
| Precip in | 2.9 | 3.4 | 3.4 | 3.4 | 3.6 | 5.3 | 5.5 | 6.3 | 5.2 | 4.0 | 2.7 | 3.5 | 49.2 |
1996–2025 normals for Berkeley County — the climate division Saint Stephen sits in. All-time county record high 103.8°F (1952-06-27); record low 5.0°F (1985-01-21). Source: NOAA / National Weather Service.