The official National Weather Service forecast for Ainsworth — 42.55°N, 99.8626°W, 108.5 miles from I-80.
| Brown County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 39 | 50 | 60 | 71 | 82 | 88 | 86 | 78 | 64 | 50 | 38 | 62 |
| Avg low °F | 13 | 15 | 24 | 33 | 44 | 55 | 61 | 59 | 50 | 36 | 24 | 15 | 36 |
| Precip in | 0.5 | 0.6 | 1.2 | 2.6 | 4.0 | 4.0 | 3.0 | 2.6 | 2.2 | 1.7 | 0.6 | 0.7 | 23.7 |
1996–2025 normals for Brown County — the climate division Ainsworth sits in. All-time county record high 108.3°F (1954-07-13); record low -28.8°F (1983-12-21). Source: NOAA / National Weather Service.