Arnold Weather Forecast
- 35
- 42
Rain
- 33
- 44
Decreasing Clouds
- 35
- 49
Mostly Cloudy
- 31
- 48
Chance Rain
- 33
- 47
Mostly Sunny
- 37
- 51
Mostly Sunny
- 39
- 56
Mostly Sunny
Today 4 Jan West Slope Northern Sierra Nevada
Heavy rain at lower Elevations. And heavy rain and snow at higher Elevations. Highs 27 to 42 higher Elevations. 39 to 47 lower Elevations. No snow accumulation lower Elevations. 8 to 14 Inches higher Elevations. Snow level 6000 feet. Prevailing south Winds 5 to 15 Mph with Gusts to around 40 Mph. Over Ridges, prevailing southwest Winds 15 to 30 Mph decreasing to 10 to 20 Mph in the afternoon.
Tonight 4 Jan West Slope Northern Sierra Nevada
Colder. Areas of freezing fog until early morning. Areas of fog through the night. Widespread dense freezing fog late in the night. Heavy snow in the evening. Rain until early morning. A chance of snow after midnight. A chance of rain late in the night. Lows 20 to 35 higher Elevations. 32 to 40 lower Elevations. No snow accumulation lower Elevations. 6 to 11 Inches higher Elevations. Snow level 5500 feet. Prevailing south Winds up to 10 Mph with Gusts to around 30 Mph.
Arnold Temperature Statistics
January Temperature
COLUMBIA (15.5 miles)
Lowest 2 January, 2026
42.8 °FAverage January
52 °FHighest 2 January, 2026
59 °F
Climate (2021–Present)
COLUMBIA (15.5 miles)
Average Low 2021–2026
46.9 °FAverage 2021–2026
59.8 °FAverage High 2021–2026
73.6 °F