Cornerstone Weather Forecast
- 49
- 54
Rain Showers
- 54
- 59
Rain Showers
- 51
- 58
Rain Showers Likely
- 45
- 56
Rain Showers
- 39
- 55
Rain Showers Likely
- 40
- 53
Rain Showers Likely
Today 31 Jan Carquinez Strait and Delta
A slight chance of rain Showers early in the Morning, then a chance of rain Showers late in the morning. Rain Showers in the afternoon. Patchy fog in the late morning and afternoon. Highs around 52. Southeast Winds up to 10 Mph.
Tonight 31 Jan Carquinez Strait and Delta
Patchy fog in the evening. Rain Showers. Lows around 49. Southeast Winds 10 to 15 Mph.
Cornerstone Temperature Statistics
January Temperature
Napa, Napa County Airport (7.5 miles)
Lowest 22 January, 2025
28.9 °FAverage January
48.9 °FHighest 7 January, 2025
70.6 °F
Climate (2020–Present)
Napa, Napa County Airport (7.5 miles)
Take a look at our website widgetsAvailable free! Find Out MoreAverage Low 2020–2025
47 °FAverage 2020–2025
58.1 °FAverage High 2020–2025
70.7 °F