Castella Weather Forecast
- 41
- 55
Rain Showers
- 39
- 53
Rain Showers
- 44
- 52
Rain Showers
- 44
- 52
Rain Showers
- 44
- 53
Rain Showers Likely
- 43
- 53
Rain Showers
- 40
- 52
Rain Showers
Today 16 Dec Shasta Lake Area / Northern Shasta County
At lower Elevations, patchy dense fog through the day. A slight chance of rain Showers early in the morning. A chance of rain Showers late in the Morning, then rain Showers in the afternoon. At higher Elevations, patchy fog in the afternoon. Highs 44 to 56 higher Elevations. 51 to 59 lower Elevations. Light Winds.
Tonight 16 Dec Shasta Lake Area / Northern Shasta County
Rain Showers in the Evening, then rain Showers and a slight chance of Thunderstorms after midnight. Patchy fog through the night. Colder. Lows 34 to 46. Prevailing southwest Winds up to 10 Mph with Gusts to around 30 Mph.
Castella Temperature Statistics
December Temperature
Trinity Center (21.7 miles)
Lowest 1 December, 2025
30.2 °FAverage December
39 °FHighest 1 December, 2025
55.4 °F
Climate (2021–Present)
Trinity Center (21.7 miles)
Average Low 2021–2025
42.1 °FAverage 2021–2025
54.7 °FAverage High 2021–2025
68 °F