Currently: 63 °F. Mostly cloudy. (Weather station: San Francisco International Airport, USA). See more current weatherMay 2018 Weather in San Francisco — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
49
52
55
58
61
64
67
70
73
76
79
82
Tue, May 1
Lo:50
12 am
Hi:52
5
Lo:50
6 am
Hi:63
8
Lo:61
12 pm
Hi:66
18
Lo:54
6 pm
Hi:61
19
Wed, May 2
Lo:52
12 am
Hi:54
7
Lo:52
6 am
Hi:63
7
Lo:63
12 pm
Hi:66
12
Lo:54
6 pm
Hi:63
10
Thu, May 3
Lo:52
12 am
Hi:54
6
Lo:54
6 am
Hi:57
8
Lo:57
12 pm
Hi:63
17
Lo:54
6 pm
Hi:59
20
Fri, May 4
Lo:52
12 am
Hi:54
11
Lo:52
6 am
Hi:63
9
Lo:63
12 pm
Hi:68
19
Lo:54
6 pm
Hi:63
20
Sat, May 5
Lo:54
12 am
Hi:54
11
Lo:54
6 am
Hi:61
15
Lo:57
12 pm
Hi:61
21
Lo:54
6 pm
Hi:59
12
Sun, May 6
Lo:54
12 am
Hi:55
10
Lo:54
6 am
Hi:63
13
Lo:59
12 pm
Hi:63
20
Lo:55
6 pm
Hi:59
17
Mon, May 7
Lo:54
12 am
Hi:55
12
Lo:54
6 am
Hi:70
11
Lo:64
12 pm
Hi:70
19
Lo:57
6 pm
Hi:64
16
Tue, May 8
Lo:54
12 am
Hi:57
10
Lo:54
6 am
Hi:64
11
Lo:63
12 pm
Hi:70
16
Lo:59
6 pm
Hi:63
14
Wed, May 9
Lo:55
12 am
Hi:61
14
Lo:55
6 am
Hi:63
16
Lo:63
12 pm
Hi:66
26
Lo:55
6 pm
Hi:63
25
Thu, May 10
Lo:54
12 am
Hi:55
16
Lo:54
6 am
Hi:63
16
Lo:61
12 pm
Hi:64
23
Lo:54
6 pm
Hi:61
20
Fri, May 11
Lo:52
12 am
Hi:54
6
Lo:52
6 am
Hi:70
4
Lo:70
12 pm
Hi:73
17
Lo:64
6 pm
Hi:73
17
Sat, May 12
Lo:63
12 am
Hi:73
9
Lo:63
6 am
Hi:75
11
Lo:66
12 pm
Hi:75
12
Lo:57
6 pm
Hi:66
7
Sun, May 13
Lo:55
12 am
Hi:57
7
Lo:55
6 am
Hi:64
12
Lo:64
12 pm
Hi:66
16
Lo:55
6 pm
Hi:64
12
Mon, May 14
Lo:55
12 am
Hi:55
9
Lo:55
6 am
Hi:63
9
Lo:61
12 pm
Hi:64
17
Lo:57
6 pm
Hi:61
13
Tue, May 15
Lo:57
12 am
Hi:57
7
Lo:57
6 am
Hi:63
7
Lo:63
12 pm
Hi:66
15
Lo:57
6 pm
Hi:63
12
Wed, May 16
Lo:55
12 am
Hi:57
7
Lo:55
6 am
Hi:64
9
Lo:63
12 pm
Hi:66
14
Lo:57
6 pm
Hi:63
16
Thu, May 17
Lo:55
12 am
Hi:57
13
Lo:55
6 am
Hi:63
13
Lo:61
12 pm
Hi:64
21
Lo:57
6 pm
Hi:61
20
Fri, May 18
Lo:55
12 am
Hi:57
11
Lo:55
6 am
Hi:59
11
Lo:57
12 pm
Hi:63
18
Lo:55
6 pm
Hi:57
16
Sat, May 19
Lo:55
12 am
Hi:55
16
Lo:55
6 am
Hi:61
16
Lo:57
12 pm
Hi:63
22
Lo:55
6 pm
Hi:57
19
Sun, May 20
Lo:55
12 am
Hi:55
17
Lo:55
6 am
Hi:59
21
Lo:57
12 pm
Hi:61
22
Lo:54
6 pm
Hi:57
20
Mon, May 21
Lo:52
12 am
Hi:54
10
Lo:52
6 am
Hi:66
4
Lo:57
12 pm
Hi:66
19
Lo:55
6 pm
Hi:57
14
Tue, May 22
Lo:55
12 am
Hi:55
11
Lo:55
6 am
Hi:57
11
Lo:57
12 pm
Hi:61
15
Lo:55
6 pm
Hi:57
10
Wed, May 23
Lo:55
12 am
Hi:55
6
Lo:55
6 am
Hi:61
7
Lo:61
12 pm
Hi:63
15
Lo:55
6 pm
Hi:61
11
Thu, May 24
Lo:55
12 am
Hi:55
7
Lo:55
6 am
Hi:59
7
Lo:59
12 pm
Hi:63
14
Lo:57
6 pm
Hi:59
9
Fri, May 25
Lo:55
12 am
Hi:57
6
Lo:55
6 am
Hi:63
6
Lo:61
12 pm
Hi:64
12
Lo:57
6 pm
Hi:63
9
Sat, May 26
Lo:55
12 am
Hi:57
15
Lo:55
6 am
Hi:63
12
Lo:61
12 pm
Hi:64
12
Lo:55
6 pm
Hi:63
16
Sun, May 27
Lo:54
12 am
Hi:55
3
Lo:54
6 am
Hi:66
4
Lo:66
12 pm
Hi:72
16
Lo:59
6 pm
Hi:68
13
Mon, May 28
Lo:55
12 am
Hi:59
9
Lo:55
6 am
Hi:70
4
Lo:70
12 pm
Hi:82
14
Lo:61
6 pm
Hi:72
16
Tue, May 29
Lo:57
12 am
Hi:61
9
Lo:57
6 am
Hi:70
11
Lo:64
12 pm
Hi:70
23
Lo:55
6 pm
Hi:64
21
Wed, May 30
Lo:54
12 am
Hi:55
14
Lo:54
6 am
Hi:61
21
Lo:61
12 pm
Hi:63
26
Lo:55
6 pm
Hi:61
25
Thu, May 31
Lo:54
12 am
Hi:55
26
Lo:54
6 am
Hi:61
19
Lo:61
12 pm
Hi:64
25
Lo:54
6 pm
Hi:61
21
Tuesday, May 1, 2018, 12:00 am — 6:00 am
52 / 50 °F
Passing clouds.
Humidity: 76%
Barometer: 29.88 "Hg
SSW
Wind: 4.971 mph
High & Low Weather Summary for May 2018
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 83 °F (May 28, 4:56 pm) | 90% (May 9, 4:56 am) | 30.28 "Hg (May 9, 4:56 am) |
| Low | 50 °F (May 1, 5:56 am) | 27% (May 11, 11:56 pm) | 29.75 "Hg (May 11, 6:56 pm) |
| Average | 59 °F | 67% | 29.99 "Hg |
| * Reported May 1 12:56 am — May 31 11:56 pm, San Francisco. 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
San Francisco Weather History for May 1, 2018
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 12:56 am Tue, May 1 |  | 52 °F | Passing clouds. | 5 mph | ↑ | 75% | 29.90 "Hg | 10 mi |
| 1:56 am | | 52 °F | Passing clouds. | No wind | ↑ | 75% | 29.88 "Hg | 10 mi |
| 2:56 am | | 51 °F | Passing clouds. | 5 mph | ↑ | 77% | 29.88 "Hg | 10 mi |
| 3:56 am | | 51 °F | Passing clouds. | 8 mph | ↑ | 77% | 29.87 "Hg | 10 mi |
| 4:56 am | | 51 °F | Passing clouds. | 7 mph | ↑ | 77% | 29.88 "Hg | 10 mi |
| 5:56 am | | 50 °F | Passing clouds. | 5 mph | ↑ | 77% | 29.88 "Hg | 9 mi |
| 6:56 am |  | 50 °F | Scattered clouds. | 3 mph | ↑ | 80% | 29.88 "Hg | 10 mi |
| 7:56 am | | 53 °F | Partly sunny. | 6 mph | ↑ | 72% | 29.90 "Hg | 10 mi |
| 8:56 am | | 56 °F | Partly sunny. | 5 mph | ↑ | 70% | 29.90 "Hg | 10 mi |
| 9:56 am | | 59 °F | Passing clouds. | 8 mph | ↑ | 60% | 29.90 "Hg | 10 mi |
| 10:56 am | | 60 °F | Passing clouds. | 14 mph | ↑ | 58% | 29.90 "Hg | 10 mi |
| 11:56 am | | 62 °F | Passing clouds. | 15 mph | ↑ | 54% | 29.89 "Hg | 10 mi |
| 12:56 pm | | 65 °F | Passing clouds. | 14 mph | ↑ | 51% | 29.87 "Hg | 10 mi |
| 1:56 pm | | 67 °F | Passing clouds. | 14 mph | ↑ | 49% | 29.87 "Hg | 10 mi |
| 2:56 pm | | 65 °F | Partly sunny. | 20 mph | ↑ | 51% | 29.86 "Hg | 10 mi |
| 3:56 pm | | 62 °F | Partly sunny. | 21 mph | ↑ | 56% | 29.84 "Hg | 10 mi |
| 4:56 pm | | 63 °F | Partly sunny. | 22 mph | ↑ | 52% | 29.83 "Hg | 10 mi |
| 5:56 pm | | 60 °F | Partly sunny. | 23 mph | ↑ | 56% | 29.83 "Hg | 10 mi |
| 6:56 pm | | 57 °F | Scattered clouds. | 25 mph | ↑ | 64% | 29.83 "Hg | 10 mi |
| 7:56 pm | | 55 °F | Passing clouds. | 25 mph | ↑ | 69% | 29.84 "Hg | 10 mi |
| 8:56 pm | | 54 °F | Passing clouds. | 13 mph | ↑ | 74% | 29.87 "Hg | 10 mi |
| 9:56 pm | | 54 °F | Passing clouds. | 17 mph | ↑ | 74% | 29.90 "Hg | 10 mi |
| 10:56 pm |  | 54 °F | Partly cloudy. | 14 mph | ↑ | 74% | 29.90 "Hg | 10 mi |
| 11:56 pm |  | 54 °F | Overcast. | 15 mph | ↑ | 74% | 29.90 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||