The official National Weather Service forecast for Frontenac — 37.4556°N, 94.6891°W, 83.4 miles from I-35.
| Crawford County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 48 | 59 | 68 | 77 | 86 | 90 | 90 | 83 | 71 | 58 | 47 | 68 |
| Avg low °F | 24 | 27 | 37 | 46 | 56 | 65 | 69 | 68 | 60 | 48 | 37 | 28 | 47 |
| Precip in | 1.7 | 1.8 | 3.3 | 4.5 | 6.4 | 5.6 | 3.8 | 3.8 | 4.0 | 3.9 | 2.7 | 2.0 | 43.5 |
1996–2025 normals for Crawford County — the climate division Frontenac sits in. All-time county record high 115.2°F (1954-07-14); record low -16.4°F (1989-12-23). Source: NOAA / National Weather Service.