The official National Weather Service forecast for Johnson — 37.5706°N, 101.751°W, 118.4 miles from I-70.
| Stanton County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 47 | 51 | 61 | 70 | 79 | 90 | 94 | 91 | 85 | 72 | 59 | 49 | 71 |
| Avg low °F | 19 | 21 | 30 | 38 | 49 | 59 | 64 | 62 | 54 | 41 | 29 | 21 | 41 |
| Precip in | 0.4 | 0.3 | 0.9 | 1.3 | 2.1 | 2.5 | 2.9 | 2.8 | 1.3 | 1.5 | 0.4 | 0.5 | 16.9 |
1996–2025 normals for Stanton County — the climate division Johnson sits in. All-time county record high 109.6°F (2012-06-28); record low -21.1°F (1984-01-19). Source: NOAA / National Weather Service.