The official National Weather Service forecast for O'Donnell — 32.9637°N, 101.8327°W, 39.5 miles from I-27. Forecasts here are written by NWS LUB, this county’s forecast office.
| Lynn County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 56 | 60 | 69 | 77 | 85 | 92 | 94 | 93 | 86 | 77 | 65 | 57 | 76 |
| Avg low °F | 29 | 32 | 40 | 47 | 57 | 66 | 69 | 68 | 61 | 50 | 38 | 31 | 49 |
| Precip in | 0.6 | 0.6 | 1.1 | 1.3 | 2.5 | 2.7 | 1.9 | 2.2 | 2.5 | 1.7 | 1.0 | 0.7 | 18.8 |
1996–2025 normals for Lynn County — the climate division O'Donnell sits in. All-time county record high 112.7°F (1994-06-28); record low -4.5°F (1963-01-13). Source: NOAA / National Weather Service.