The official National Weather Service forecast for Berne — 40.6578°N, 84.9519°W, 24 miles from I-69. Forecasts here are written by NWS IWX, this county’s forecast office.
| Adams County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 33 | 37 | 49 | 62 | 72 | 81 | 84 | 82 | 77 | 65 | 50 | 39 | 61 |
| Avg low °F | 19 | 21 | 30 | 39 | 50 | 60 | 63 | 61 | 54 | 43 | 33 | 24 | 41 |
| Precip in | 2.6 | 2.3 | 3.0 | 3.8 | 4.6 | 4.3 | 4.3 | 3.8 | 3.0 | 2.9 | 2.7 | 2.6 | 39.9 |
1996–2025 normals for Adams County — the climate division Berne sits in. All-time county record high 104.7°F (2012-06-29); record low -23.4°F (1985-01-20). Source: NOAA / National Weather Service.