The official National Weather Service forecast for Colfax — 41.6778°N, 93.2452°W, 2.4 miles from I-80.
| Jasper County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 34 | 48 | 61 | 72 | 82 | 85 | 83 | 77 | 64 | 49 | 35 | 60 |
| Avg low °F | 13 | 16 | 28 | 39 | 50 | 61 | 64 | 61 | 54 | 41 | 30 | 18 | 40 |
| Precip in | 1.0 | 1.1 | 2.0 | 3.4 | 5.0 | 5.3 | 4.1 | 4.0 | 3.2 | 2.9 | 1.7 | 1.4 | 35.1 |
1996–2025 normals for Jasper County — the climate division Colfax sits in. All-time county record high 103.5°F (2012-07-26); record low -28.6°F (1996-02-03). Source: NOAA / National Weather Service.