The official National Weather Service forecast for Harmony — 35.9557°N, 80.7717°W, 7 miles from I-40. Forecasts here are written by NWS GSP, this county’s forecast office.
| Iredell County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 50 | 54 | 62 | 71 | 78 | 85 | 88 | 86 | 81 | 72 | 62 | 53 | 70 |
| Avg low °F | 29 | 32 | 38 | 46 | 54 | 63 | 67 | 66 | 60 | 47 | 36 | 31 | 47 |
| Precip in | 3.6 | 3.2 | 3.7 | 3.8 | 4.2 | 3.9 | 4.4 | 4.5 | 4.1 | 2.9 | 3.0 | 3.9 | 45.2 |
1996–2025 normals for Iredell County — the climate division Harmony sits in. All-time county record high 102.7°F (1983-08-22); record low -7.4°F (1985-01-21). Source: NOAA / National Weather Service.