May 2018 Weather in Napa — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
40
44
48
52
56
60
64
68
72
76
80
84
Tue, May 1
Lo:43
12 am
Hi:46
1
Lo:41
6 am
Hi:63
5
Lo:66
12 pm
Hi:70
14
Lo:52
6 pm
Hi:63
12
Wed, May 2
Lo:52
12 am
Hi:54
10
Lo:54
6 am
Hi:63
9
Lo:63
12 pm
Hi:66
17
Lo:50
6 pm
Hi:61
9
Thu, May 3
Lo:50
12 am
Hi:52
11
Lo:52
6 am
Hi:59
12
Lo:59
12 pm
Hi:66
12
Lo:50
6 pm
Hi:57
9
Fri, May 4
Lo:45
12 am
Hi:50
6
Lo:48
6 am
Hi:63
4
Lo:66
12 pm
Hi:73
8
Lo:52
6 pm
Hi:70
6
Sat, May 5
Lo:46
12 am
Hi:50
2
Lo:48
6 am
Hi:63
5
Lo:64
12 pm
Hi:70
12
Lo:52
6 pm
Hi:63
9
Sun, May 6
Lo:48
12 am
Hi:52
6
Lo:52
6 am
Hi:64
11
Lo:63
12 pm
Hi:68
13
Lo:55
6 pm
Hi:61
8
Mon, May 7
Lo:45
12 am
Hi:54
4
Lo:46
6 am
Hi:70
4
Lo:72
12 pm
Hi:75
13
Lo:54
6 pm
Hi:72
8
Tue, May 8
Lo:50
12 am
Hi:57
3
Lo:50
6 am
Hi:64
6
Lo:70
12 pm
Hi:75
14
Lo:61
6 pm
Hi:66
16
Wed, May 9
Lo:55
12 am
Hi:57
12
Lo:55
6 am
Hi:70
12
Lo:66
12 pm
Hi:73
17
Lo:55
6 pm
Hi:63
6
Thu, May 10
Lo:46
12 am
Hi:55
5
Lo:48
6 am
Hi:66
6
Lo:70
12 pm
Hi:75
12
Lo:55
6 pm
Hi:68
10
Fri, May 11
Lo:46
12 am
Hi:54
4
Lo:52
6 am
Hi:70
4
Lo:72
12 pm
Hi:82
16
Lo:68
6 pm
Hi:81
16
Sat, May 12
Lo:61
12 am
Hi:66
9
Lo:63
6 am
Hi:79
13
Lo:63
12 pm
Hi:68
22
Lo:54
6 pm
Hi:59
13
Sun, May 13
Lo:54
12 am
Hi:54
10
Lo:54
6 am
Hi:63
9
Lo:63
12 pm
Hi:66
16
Lo:54
6 pm
Hi:61
14
Mon, May 14
Lo:54
12 am
Hi:54
13
Lo:54
6 am
Hi:59
11
Lo:61
12 pm
Hi:64
16
Lo:55
6 pm
Hi:57
14
Tue, May 15
Lo:54
12 am
Hi:55
13
Lo:54
6 am
Hi:63
9
Lo:63
12 pm
Hi:68
15
Lo:54
6 pm
Hi:61
13
Wed, May 16
Lo:52
12 am
Hi:54
10
Lo:54
6 am
Hi:64
10
Lo:61
12 pm
Hi:66
16
Lo:52
6 pm
Hi:61
10
Thu, May 17
Lo:43
12 am
Hi:50
1
Lo:45
6 am
Hi:68
3
Lo:64
12 pm
Hi:70
16
Lo:54
6 pm
Hi:63
11
Fri, May 18
Lo:48
12 am
Hi:54
6
Lo:52
6 am
Hi:63
8
Lo:64
12 pm
Hi:66
16
Lo:52
6 pm
Hi:64
9
Sat, May 19
Lo:48
12 am
Hi:52
6
Lo:52
6 am
Hi:68
11
Lo:63
12 pm
Hi:72
17
Lo:54
6 pm
Hi:61
14
Sun, May 20
12 am
N/A
0
6 am
N/A
0
12 pm
N/A
0
6 pm
N/A
0
Mon, May 21
12 am
N/A
0
Lo:55
6 am
Hi:66
10
Lo:64
12 pm
Hi:70
18
Lo:55
6 pm
Hi:63
14
Tue, May 22
Lo:54
12 am
Hi:55
9
Lo:54
6 am
Hi:61
12
Lo:61
12 pm
Hi:66
16
Lo:55
6 pm
Hi:59
12
Wed, May 23
Lo:55
12 am
Hi:55
9
Lo:55
6 am
Hi:61
9
Lo:59
12 pm
Hi:63
14
Lo:54
6 pm
Hi:59
13
Thu, May 24
Lo:55
12 am
Hi:55
9
Lo:55
6 am
Hi:61
11
Lo:63
12 pm
Hi:66
17
Lo:54
6 pm
Hi:57
11
Fri, May 25
Lo:54
12 am
Hi:55
9
Lo:54
6 am
Hi:61
11
Lo:63
12 pm
Hi:66
11
Lo:55
6 pm
Hi:63
8
Sat, May 26
Lo:54
12 am
Hi:55
7
Lo:55
6 am
Hi:64
6
Lo:64
12 pm
Hi:70
14
Lo:55
6 pm
Hi:66
7
Sun, May 27
Lo:46
12 am
Hi:52
1
Lo:52
6 am
Hi:70
5
Lo:73
12 pm
Hi:75
14
Lo:55
6 pm
Hi:72
7
Mon, May 28
Lo:48
12 am
Hi:57
2
Lo:55
6 am
Hi:75
4
Lo:81
12 pm
Hi:86
12
Lo:57
6 pm
Hi:77
5
Tue, May 29
Lo:52
12 am
Hi:57
2
Lo:57
6 am
Hi:75
6
Lo:73
12 pm
Hi:79
14
Lo:57
6 pm
Hi:72
12
Wed, May 30
Lo:54
12 am
Hi:57
13
Lo:54
6 am
Hi:64
13
Lo:64
12 pm
Hi:68
18
Lo:52
6 pm
Hi:61
12
Thu, May 31
Lo:52
12 am
Hi:52
10
Lo:52
6 am
Hi:66
9
Lo:66
12 pm
Hi:70
16
Lo:48
6 pm
Hi:63
9
Tuesday, May 1, 2018, 12:00 am — 6:00 am
46 / 43 °F
Clear.
Humidity: 93%
Barometer: 29.85 "Hg
ESE
Wind: 0.621 mph
High & Low Weather Summary for May 2018
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 86 °F (May 28, 2:54 pm) | 97% (May 1, 3:05 am) | 30.27 "Hg (May 1, 3:05 am) |
| Low | 41 °F (May 1, 6:54 am) | 15% (May 11, 3:54 pm) | 29.67 "Hg (May 29, 6:54 pm) |
| Average | 59 °F | 73% | 29.95 "Hg |
| * Reported May 1 12:54 am — May 31 11:54 pm, Napa. Weather by CustomWeather, © 2025 | |||
Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records
Napa Weather History for May 1, 2018
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 12:54 am Tue, May 1 |  | 46 °F | Clear. | No wind | ↑ | 89% | 29.85 "Hg | 10 mi |
| 1:54 am |  | 43 °F | Fog. | No wind | ↑ | 93% | 29.85 "Hg | 5 mi |
| 2:36 am | | 44 °F | Fog. | No wind | ↑ | 96% | 29.87 "Hg | 2 mi |
| 2:54 am | | 42 °F | Fog. | 3 mph | ↑ | 96% | 29.84 "Hg | 2 mi |
| 3:05 am | | 45 °F | Clear. | No wind | ↑ | 97% | 29.87 "Hg | 8 mi |
| 3:54 am | | 44 °F | Clear. | No wind | ↑ | 89% | 29.84 "Hg | 10 mi |
| 4:54 am | | 42 °F | Clear. | No wind | ↑ | 92% | 29.84 "Hg | 10 mi |
| 5:54 am | | 42 °F | Clear. | No wind | ↑ | 92% | 29.84 "Hg | 10 mi |
| 6:54 am |  | 41 °F | Scattered clouds. | No wind | ↑ | 96% | 29.84 "Hg | 10 mi |
| 7:54 am |  | 51 °F | Partly sunny. | 3 mph | ↑ | 83% | 29.86 "Hg | 10 mi |
| 8:54 am | | 53 °F | Partly sunny. | No wind | ↑ | 77% | 29.87 "Hg | 10 mi |
| 9:54 am | | 58 °F | Passing clouds. | 8 mph | ↑ | 67% | 29.87 "Hg | 10 mi |
| 10:54 am |  | 61 °F | Sunny. | 8 mph | ↑ | 58% | 29.86 "Hg | 10 mi |
| 11:54 am | | 63 °F | Sunny. | 9 mph | ↑ | 65% | 29.85 "Hg | 10 mi |
| 12:54 pm | | 66 °F | Passing clouds. | 9 mph | ↑ | 61% | 29.82 "Hg | 10 mi |
| 1:54 pm | | 69 °F | Passing clouds. | 14 mph | ↑ | 55% | 29.80 "Hg | 10 mi |
| 2:54 pm | | 68 °F | Sunny. | 17 mph | ↑ | 53% | 29.79 "Hg | 10 mi |
| 3:54 pm | | 68 °F | Sunny. | 15 mph | ↑ | 55% | 29.78 "Hg | 10 mi |
| 4:54 pm | | 68 °F | Sunny. | 13 mph | ↑ | 51% | 29.77 "Hg | 10 mi |
| 5:54 pm | | 67 °F | Sunny. | 15 mph | ↑ | 45% | 29.76 "Hg | 10 mi |
| 6:54 pm | | 62 °F | Sunny. | 10 mph | ↑ | 58% | 29.76 "Hg | 10 mi |
| 7:54 pm | | 56 °F | Sunny. | 10 mph | ↑ | 72% | 29.78 "Hg | 10 mi |
| 8:54 pm | | 55 °F | Clear. | 13 mph | ↑ | 74% | 29.79 "Hg | 10 mi |
| 9:54 pm | | 53 °F | Clear. | 9 mph | ↑ | 80% | 29.81 "Hg | 10 mi |
| 10:54 pm | | 52 °F | Clear. | 9 mph | ↑ | 83% | 29.83 "Hg | 10 mi |
| 11:54 pm | | 53 °F | Passing clouds. | 18 mph | ↑ | 83% | 29.83 "Hg | 9 mi |
| Weather by CustomWeather, © 2025 | ||||||||