The official National Weather Service forecast for Chico — 39.7285°N, 121.8375°W, population 111,411, 19.9 miles from I-5. Forecasts here are written by NWS STO, this county’s forecast office.
| Butte County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 55 | 58 | 63 | 69 | 78 | 87 | 94 | 92 | 87 | 76 | 62 | 54 | 73 |
| Avg low °F | 37 | 38 | 41 | 44 | 51 | 57 | 62 | 61 | 57 | 49 | 42 | 37 | 48 |
| Precip in | 7.4 | 7.6 | 5.9 | 3.2 | 1.9 | 0.5 | 0.0 | 0.1 | 0.4 | 2.4 | 4.9 | 8.5 | 42.8 |
1996–2025 normals for Butte County — the climate division Chico sits in. All-time county record high 110.8°F (2022-09-07); record low 11.9°F (1972-12-09). Source: NOAA / National Weather Service.