Thornton Weather Forecast
- 42
- 51
Dense Fog
- 51
- 55
Increasing Clouds
- 47
- 63
Chance Rain Showers
- 49
- 60
Mostly Cloudy
- 52
- 57
Rain Showers
- 51
- 57
Rain Showers Likely
- 51
- 56
Rain Showers Likely
Today 15 Dec Northern San Joaquin Valley
Mostly cloudy. Widespread fog. Locally dense early in the Morning, then Areas of fog. Locally dense late in the morning. Widespread fog. Locally dense early in the afternoon. Patchy fog late in the afternoon. Highs 50 to 60. Light Winds.
Tonight 15 Dec Northern San Joaquin Valley
Mostly cloudy. Patchy fog until early Morning, then widespread fog. Locally dense late in the night. Lows 40 to 46. Light Winds.
Thornton Temperature Statistics
December Temperature
Sacramento Executive Airport (19.3 miles)
Lowest 2 December, 2025
37 °FAverage December
44.2 °FHighest 3 December, 2025
62.1 °F
Climate (2020–Present)
Sacramento Executive Airport (19.3 miles)
Average Low 2020–2025
50.1 °FAverage 2020–2025
61.5 °FAverage High 2020–2025
75.5 °F