The official National Weather Service forecast for Delphos — 40.8434°N, 84.3416°W, population 7,266, 15 miles from I-75.
| Van Wert County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 33 | 37 | 49 | 61 | 72 | 81 | 84 | 82 | 77 | 65 | 50 | 38 | 61 |
| Avg low °F | 19 | 21 | 30 | 39 | 50 | 60 | 63 | 61 | 54 | 44 | 33 | 25 | 42 |
| Precip in | 2.5 | 2.3 | 2.8 | 3.7 | 4.6 | 4.1 | 4.3 | 3.6 | 3.1 | 2.8 | 2.6 | 2.6 | 39.0 |
1996–2025 normals for Van Wert County — the climate division Delphos sits in. All-time county record high 104.9°F (2012-06-29); record low -21.8°F (1994-01-19). Source: NOAA / National Weather Service.