The official National Weather Service forecast for Jacksonville — 37.5584°N, 92.4227°W, 14.5 miles from I-44. Forecasts here are written by NWS SGF, this county’s forecast office.
| Laclede County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 48 | 58 | 68 | 76 | 84 | 88 | 87 | 81 | 69 | 57 | 47 | 67 |
| Avg low °F | 23 | 27 | 35 | 45 | 54 | 63 | 67 | 65 | 57 | 46 | 36 | 27 | 45 |
| Precip in | 2.5 | 2.5 | 4.0 | 4.6 | 5.4 | 4.3 | 4.2 | 4.2 | 3.4 | 3.5 | 3.0 | 2.4 | 44.0 |
1996–2025 normals for Laclede County — the climate division Jacksonville sits in. All-time county record high 109.8°F (1954-07-13); record low -18.7°F (1989-12-23). Source: NOAA / National Weather Service.