The official National Weather Service forecast for Arthur — 41.5716°N, 101.6916°W, 31.2 miles from I-80.
| Arthur County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 40 | 51 | 60 | 70 | 82 | 88 | 86 | 78 | 63 | 51 | 40 | 62 |
| Avg low °F | 15 | 17 | 25 | 33 | 43 | 54 | 60 | 58 | 49 | 36 | 24 | 16 | 36 |
| Precip in | 0.3 | 0.5 | 1.0 | 2.2 | 3.4 | 3.4 | 2.8 | 2.4 | 1.7 | 1.2 | 0.5 | 0.3 | 19.7 |
1996–2025 normals for Arthur County — the climate division Arthur sits in. All-time county record high 106.6°F (1954-07-11); record low -34.2°F (1989-12-22). Source: NOAA / National Weather Service.