The official National Weather Service forecast for Middleton — 43.7068°N, 116.6201°W, population 10,265, 3.9 miles from I-84. Forecasts here are written by NWS BOI, this county’s forecast office.
| Canyon County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 47 | 58 | 65 | 74 | 84 | 94 | 91 | 81 | 67 | 51 | 40 | 66 |
| Avg low °F | 24 | 27 | 32 | 37 | 45 | 52 | 60 | 57 | 48 | 37 | 30 | 24 | 39 |
| Precip in | 1.2 | 0.9 | 1.0 | 0.9 | 1.2 | 0.7 | 0.2 | 0.2 | 0.4 | 0.7 | 0.8 | 1.3 | 9.5 |
1996–2025 normals for Canyon County — the climate division Middleton sits in. All-time county record high 108.6°F (2002-07-12); record low -20.4°F (1962-01-22). Source: NOAA / National Weather Service.