The official National Weather Service forecast for Aneta — 47.6794°N, 97.9882°W, 42.3 miles from I-29.
| Nelson County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 16 | 20 | 33 | 50 | 66 | 75 | 80 | 78 | 70 | 53 | 35 | 21 | 50 |
| Avg low °F | -2 | 1 | 14 | 28 | 41 | 53 | 57 | 55 | 46 | 33 | 18 | 5 | 29 |
| Precip in | 0.5 | 0.4 | 0.7 | 1.3 | 3.0 | 3.6 | 3.3 | 2.5 | 2.0 | 1.7 | 0.7 | 0.7 | 20.4 |
1996–2025 normals for Nelson County — the climate division Aneta sits in. All-time county record high 102.5°F (1983-08-08); record low -39.3°F (1996-02-01). Source: NOAA / National Weather Service.