The official National Weather Service forecast for Lemmon — 45.9408°N, 102.1593°W, 124.4 miles from I-90.
| Perkins County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 29 | 32 | 44 | 56 | 67 | 78 | 87 | 85 | 76 | 59 | 44 | 32 | 57 |
| Avg low °F | 8 | 10 | 20 | 30 | 41 | 51 | 58 | 55 | 46 | 32 | 20 | 10 | 32 |
| Precip in | 0.3 | 0.5 | 0.7 | 1.6 | 3.2 | 3.0 | 2.1 | 1.9 | 1.4 | 1.5 | 0.4 | 0.4 | 17.0 |
1996–2025 normals for Perkins County — the climate division Lemmon sits in. All-time county record high 109.5°F (2002-06-30); record low -36.7°F (2018-01-01). Source: NOAA / National Weather Service.