Napa Weather in 2020

Historical record of Napa, California weather for the year 2020 based on NOAA data.
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2020 Napa Weather Extremes
Highest temperature 110 °F September 6
Lowest temperature 27 °F February 3
Highest daily low 69 °F August 16
Lowest daily high 48 °F January 19
Most daily precipitation 0.7 inches January 16
Total annual precipitation 5.9 inches -
Highest Temperatures in Napa in 2020
Rank Temperature Date
1 110 °F Sep 6
2 106 °F Sep 7
2 106 °F Aug 14
4 103 °F Sep 28
5 102 °F Aug 15
6 101 °F Oct 15
6 101 °F Sep 27
6 101 °F Sep 5
9 99 °F Aug 16
10 98 °F Sep 8
10 98 °F May 26
Lowest Temperatures in Napa in 2020
Rank Temperature Date
1 27 °F February 3
2 28 °F December 23
3 29 °F December 30
3 29 °F December 1
3 29 °F November 29
3 29 °F November 21
3 29 °F February 5
8 30 °F November 28
8 30 °F November 10
8 30 °F March 27
8 30 °F January 15
8 30 °F January 12
8 30 °F January 10
January 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
62 38 0.00
63 36 0.00
59 34 0.00
60 35 0.02
61 32 0.00
58 31 0.00
56 32 0.07
55 41 0.00
56 33 0.07
55 30 0.00
58 35 0.03
54 30 0.00
57 34 0.06
56 34 0.00
51 30 0.00
50 36 0.68
55 34 0.04
58 36 0.00
48 39 0.00
55 37 0.00
56 37 0.17
60 41 0.00
58 41 0.00
61 38 0.00
61 49 0.04
63 43 0.16
62 40 0.00
60 39 0.02
65 37 0.00
66 43 0.00
68 40 0.00
February 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
67 36 0.00
58 37 0.00
57 27 0.00
60 32 0.00
62 29 0.00
64 33 0.00
66 34 0.00
60 36 0.00
63 47 0.00
76 47 0.00
78 40 0.00
68 36 0.00
56 40 0.00
62 43 0.00
64 36 0.00
65 41 0.00
75 35 0.00
65 36 0.00
64 33 0.00
68 37 0.00
71 36 0.00
61 37 0.00
62 35 0.00
72 32 0.00
73 39 0.00
74 37 0.00
77 39 0.00
72 40 0.00
62 40 0.00
March 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
62 41 0.00
73 45 0.00
76 40 0.00
78 37 0.00
63 40 0.00
58 47 0.00
56 38 0.04
56 35 0.00
67 40 0.00
71 37 0.00
71 42 0.00
71 37 0.00
63 42 0.00
55 46 0.23
57 44 0.17
52 41 0.07
56 37 0.00
54 45 0.08
61 37 0.00
64 35 0.00
66 36 0.00
69 38 0.00
60 40 0.00
56 40 0.17
58 32 0.00
61 32 0.03
60 30 0.00
59 41 0.02
62 44 0.02
63 47 0.00
67 49 0.00
April 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
64 37 0.00
67 35 0.00
64 33 0.00
58 43 0.16
57 42 0.37
58 36 0.12
64 35 0.00
61 42 0.00
64 48 0.00
68 47 0.00
57 49 0.00
65 47 0.00
72 41 0.00
81 34 0.00
77 42 0.00
65 53 0.00
63 52 0.00
65 45 0.00
64 41 0.00
67 47 0.00
70 38 0.00
79 41 0.00
81 51 0.00
83 45 0.00
83 49 0.00
75 48 0.00
82 42 0.00
83 50 0.00
77 51 0.00
78 48 0.00
May 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
78 41 0.00
72 53 0.00
73 37 0.00
80 36 0.00
77 37 0.00
83 40 0.00
88 42 0.00
91 44 0.00
71 50 0.00
69 50 0.00
66 47 0.11
67 51 0.32
62 46 0.06
67 50 0.00
76 46 0.00
76 49 0.01
72 58 0.23
67 49 0.14
72 43 0.00
72 43 0.00
78 45 0.00
76 46 0.00
83 45 0.00
87 47 0.00
94 50 0.00
98 55 0.00
89 56 0.00
79 54 0.00
72 53 0.00
76 57 0.00
73 55 0.00
June 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
79 55 0.00
91 51 0.00
94 56 0.00
91 54 0.00
75 53 0.00
74 51 0.00
74 50 0.00
82 44 0.00
89 45 0.00
88 49 0.00
85 54 0.00
74 53 0.00
75 53 0.00
80 49 0.00
81 52 0.00
80 48 0.00
91 49 0.00
92 49 0.00
74 54 0.00
72 53 0.00
81 57 0.00
76 57 0.00
77 56 0.00
77 56 0.00
76 58 0.00
77 56 0.00
74 56 0.00
78 54 0.00
83 51 0.00
81 51 0.00
July 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
74 57 0.00
72 55 0.00
74 54 0.00
87 49 0.00
86 51 0.00
73 52 0.00
82 60 0.00
83 54 0.00
84 55 0.00
82 56 0.00
90 52 0.00
88 50 0.00
72 57 0.00
73 56 0.00
75 56 0.00
76 56 0.00
74 55 0.00
78 52 0.00
77 57 0.00
79 57 0.00
76 56 0.00
75 58 0.00
74 57 0.00
72 55 0.00
77 57 0.00
79 55 0.00
77 54 0.00
78 53 0.00
79 52 0.00
78 54 0.00
80 54 0.00
August 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
80 51 0.00
78 55 0.00
87 55 0.00
75 58 0.00
75 57 0.00
81 59 0.00
78 59 0.00
77 59 0.00
84 55 0.00
77 57 0.00
77 59 0.00
81 57 0.00
94 51 0.00
106 63 0.00
102 62 0.00
99 69 0.05
94 68 0.00
94 65 0.00
n/a 63 0.00
83 57 0.00
93 59 0.00
88 60 0.00
84 54 0.00
83 62 0.00
77 57 0.00
72 55 0.00
73 56 0.00
73 53 0.00
72 55 0.00
74 54 0.00
75 51 0.00
September 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
74 56 0.00
78 58 0.00
80 55 0.00
80 55 0.00
101 53 0.00
110 62 0.00
106 63 0.00
98 62 0.00
63 60 0.00
67 54 0.00
80 48 0.00
87 47 0.00
73 52 0.00
76 52 0.00
81 48 0.00
84 56 0.00
83 63 0.00
82 61 0.00
85 51 0.00
86 54 0.00
79 55 0.00
81 52 0.00
86 51 0.00
87 52 0.00
82 47 0.00
87 52 0.00
101 60 0.00
103 60 0.00
83 54 0.00
91 51 0.00
October 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
91 56 0.00
90 53 0.00
91 51 0.00
81 49 0.00
86 45 0.00
84 46 0.00
72 43 0.00
70 55 0.00
73 58 0.00
72 54 0.00
82 47 0.00
87 47 0.00
91 48 0.00
94 52 0.00
101 51 0.00
97 54 0.00
95 n/a 0.00
91 49 0.00
83 50 0.00
87 46 0.00
86 47 0.00
77 48 0.00
73 44 0.00
67 42 0.00
76 56 0.00
81 48 0.00
79 44 0.00
79 39 0.00
79 40 0.00
75 39 0.00
79 39 0.00
November 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
84 41 0.00
83 42 0.00
71 40 0.00
78 43 0.00
85 44 0.00
66 45 0.00
65 37 0.00
62 37 0.00
62 35 0.00
63 30 0.00
62 39 0.00
65 34 0.00
59 41 0.03
65 36 0.00
68 32 0.00
73 39 0.00
67 45 0.52
66 44 0.07
64 34 0.00
64 34 0.00
65 29 0.00
62 31 0.00
64 39 0.00
66 34 0.00
65 35 0.00
68 39 0.00
65 32 0.00
66 30 0.00
67 29 0.00
65 31 0.00
December 2020 Napa Weather
Day High (°F) Low (°F) Precip. (inches)
65 29 0.00
65 32 0.00
67 35 0.00
70 34 0.00
66 35 0.00
64 34 0.00
78 44 0.00
71 34 0.00
66 35 0.00
65 33 0.00
54 33 0.23
59 48 0.00
58 45 0.53
58 34 0.00
59 34 0.00
59 35 0.16
61 37 0.42
61 33 0.00
60 32 0.00
60 32 0.00
59 31 0.00
59 35 0.00
56 28 0.00
55 39 0.00
55 43 0.06
63 40 0.00
59 36 0.00
60 34 0.01
62 31 0.00
57 29 0.09
64 37 0.01
Weather Station Details
Years Station Coordinates
1999–2024 Napa County Airport location
1901–1998 Napa State Hospital location