The official National Weather Service forecast for Mankato — 39.7872°N, 98.21°W, 63.8 miles from I-70.
| Jewell County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 43 | 55 | 66 | 75 | 86 | 90 | 88 | 81 | 68 | 54 | 42 | 66 |
| Avg low °F | 17 | 19 | 29 | 39 | 50 | 61 | 66 | 64 | 55 | 42 | 29 | 20 | 41 |
| Precip in | 0.6 | 0.8 | 1.5 | 2.3 | 4.2 | 3.7 | 3.9 | 3.5 | 2.4 | 1.9 | 1.2 | 0.8 | 26.8 |
1996–2025 normals for Jewell County — the climate division Mankato sits in. All-time county record high 110.4°F (1954-07-13); record low -28.1°F (1989-12-23). Source: NOAA / National Weather Service.