The official National Weather Service forecast for Traer — 42.1936°N, 92.4655°W, 19.6 miles from I-380.
| Tama County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 28 | 32 | 46 | 60 | 71 | 81 | 84 | 82 | 77 | 63 | 47 | 33 | 59 |
| Avg low °F | 11 | 14 | 26 | 37 | 49 | 59 | 62 | 60 | 52 | 40 | 28 | 17 | 38 |
| Precip in | 1.0 | 1.1 | 1.9 | 3.4 | 4.8 | 5.3 | 4.0 | 3.9 | 3.2 | 3.0 | 1.7 | 1.5 | 34.8 |
1996–2025 normals for Tama County — the climate division Traer sits in. All-time county record high 102.9°F (1988-08-18); record low -30.0°F (1996-02-03). Source: NOAA / National Weather Service.