Napa December Weather

Averages and records for weather in Napa, California in the month of December.
Typical Napa December Weather
1991–2020
Average daily high 57.5 °F
Average daily low 37.4 °F
Average monthly precipitation 4.3 inches
Daily chance of precipitation 34.2%
Napa December Weather Records
1901–2024
Highest temperature 81 °F December 26, 1967
Lowest temperature 14 °F December 22, 1990
Highest daily low 63 °F December 30, 1995
Lowest daily high 36 °F December 31, 1918
Hottest average high temperature 67.0 °F 1958
Coldest average high temperature 44.8 °F 1918
Most daily precipitation 4.1 inches December 27, 1931
Most monthly precipitation 16.1 inches 1955
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
December 1 60.2 38.8 73 20
December 2 59.9 38.7 75 24
December 3 59.7 38.6 75 28
December 4 59.5 38.4 74 22
December 5 59.3 38.2 76 16
December 6 59.0 38.0 74 20
December 7 58.8 38.0 78 22
December 8 58.6 37.9 77 19
December 9 58.5 37.8 72 19
December 10 58.2 37.8 75 18
December 11 58.0 37.7 76 17
December 12 57.9 37.6 75 26
December 13 57.8 37.5 72 24
December 14 57.6 37.4 73 24
December 15 57.5 37.4 71 25
December 16 57.4 37.4 72 26
December 17 57.3 37.4 76 24
December 18 57.2 37.3 68 21
December 19 57.1 37.3 78 21
December 20 57.0 37.2 72 23
December 21 57.0 37.1 71 23
December 22 56.9 37.1 68 14
December 23 56.8 37.0 70 17
December 24 56.7 37.0 73 21
December 25 56.5 37.0 72 24
December 26 56.5 37.0 81 22
December 27 56.5 37.0 75 23
December 28 56.4 37.0 75 24
December 29 56.4 37.0 71 25
December 30 56.5 37.0 71 22
December 31 56.5 37.1 74 24
Weather Station Details
Years Station Coordinates
1999–2024 Napa County Airport location
1901–1998 Napa State Hospital location