The official National Weather Service forecast for Hesston — 38.1383°N, 97.4314°W, 2.6 miles from I-135.
| Harvey County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 47 | 59 | 68 | 77 | 88 | 92 | 91 | 83 | 71 | 57 | 46 | 68 |
| Avg low °F | 21 | 24 | 34 | 43 | 54 | 64 | 69 | 67 | 59 | 46 | 34 | 24 | 45 |
| Precip in | 0.9 | 1.2 | 2.2 | 2.7 | 5.0 | 5.1 | 3.7 | 3.9 | 2.9 | 2.9 | 1.6 | 1.1 | 33.2 |
1996–2025 normals for Harvey County — the climate division Hesston sits in. All-time county record high 113.0°F (1954-07-14); record low -18.7°F (1989-12-23). Source: NOAA / National Weather Service.