Napa May Weather

Averages and records for weather in Napa, California in the month of May.
Typical Napa May Weather
1991–2020
Average daily high 73.3 °F
Average daily low 47.4 °F
Average monthly precipitation 0.9 inches
Daily chance of precipitation 12.0%
Napa May Weather Records
1901–2024
Highest temperature 104 °F May 30, 1910
Lowest temperature 30 °F May 18, 1974
Highest daily low 72 °F May 19, 1931
Lowest daily high 55 °F May 15, 1911
Hottest average high temperature 81.8 °F 1984
Coldest average high temperature 65.9 °F 1925
Most daily precipitation 1.9 inches May 16, 1996
Most monthly precipitation 3.7 inches 1996
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
May 1 71.8 45.2 93 34
May 2 72.0 45.4 93 34
May 3 72.1 45.6 93 32
May 4 72.2 45.7 92 34
May 5 72.3 45.8 96 32
May 6 72.5 45.9 96 33
May 7 72.7 46.1 98 34
May 8 72.8 46.2 97 34
May 9 73.0 46.3 97 32
May 10 73.0 46.5 94 32
May 11 73.1 46.7 91 32
May 12 73.0 46.9 103 37
May 13 73.1 47.0 100 37
May 14 73.1 47.1 96 32
May 15 73.1 47.3 101 34
May 16 73.1 47.4 99 36
May 17 73.3 47.6 100 37
May 18 73.5 47.7 100 30
May 19 73.7 47.9 95 36
May 20 73.8 48.0 99 34
May 21 74.0 48.2 97 37
May 22 74.1 48.3 95 35
May 23 74.2 48.4 99 31
May 24 74.4 48.5 102 37
May 25 74.6 48.7 98 37
May 26 74.8 48.9 98 32
May 27 75.0 49.1 102 37
May 28 75.3 49.3 96 35
May 29 75.5 49.4 103 38
May 30 75.8 49.4 104 39
May 31 76.0 49.5 102 39
Weather Station Details
Years Station Coordinates
1999–2024 Napa County Airport location
1901–1998 Napa State Hospital location