The official National Weather Service forecast for Wellington — 37.2653°N, 97.3717°W, population 7,398, 23.6 miles from I-135.
| Sumner County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 46 | 50 | 61 | 70 | 79 | 89 | 93 | 92 | 85 | 72 | 59 | 48 | 70 |
| Avg low °F | 23 | 26 | 36 | 45 | 56 | 66 | 70 | 69 | 61 | 48 | 36 | 26 | 47 |
| Precip in | 1.0 | 1.3 | 2.5 | 3.0 | 5.1 | 5.1 | 3.7 | 3.6 | 3.0 | 3.3 | 1.7 | 1.3 | 34.6 |
1996–2025 normals for Sumner County — the climate division Wellington sits in. All-time county record high 113.3°F (1954-07-14); record low -14.8°F (2021-02-16). Source: NOAA / National Weather Service.