Weather Normals - Summary
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C
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California
San Francisco, California
Elevation: 128 feet
Latitude: 37 46N
Longitude: 122 26W
Average Temperature
Years on Record: 97
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
°F
57.3
51
53.9
55.2
56.2
57.5
59.5
59.8
60.6
62.7
61.8
57.4
52
Average High Temperature
Years on Record: 97
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
°F
63.6
56.5
59.8
61.6
62.8
63.9
66.1
65.8
66.7
69.8
69.1
63.7
57.3
Average Low Temperature
Years on Record: 97
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
°F
51
45.6
47.9
48.9
49.7
51.1
52.9
53.7
54.5
55.5
54.4
51
46.8
Average Precipitation
Years on Record: 97
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
in
21.2
4.4
3.8
2.8
1.4
0.6
0.2
---
---
0.2
1.1
2.6
4.1
Average Number of Days With Precipitation
Years on Record: 97
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Days
67
11
11
10
6
3
1
---
1
1
4
8
11
Highest Recorded Temperature
Years on Record: 97
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
°F
103
79
81
86
94
101
103
103
98
101
102
86
76
Average Length of Day
Years on Record: 30
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Hours
12.7
10.4
11.3
12.4
13.7
14.7
15.3
15
14
12.8
11.6
10.6
10.1
Average Number of Days Above 90F/32C
Years on Record: 97
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Days
2.4
---
---
---
0.1
0.2
0.4
0.2
0.1
0.9
0.4
---
---
Average Number of Days Below 32F/0C
Years on Record: 97
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Days
0.2
0.1
---
---
---
---
---
---
---
---
---
---
0.1
Average Number of Rainy Days
Years on Record: 57
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
Days
67
11
10
11
6
3
1
---
1
2
4
8
10
Most Rain Reported in a Month
Years on Record: 63
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
in.
43.8
10.7
10.1
9
5.5
4
1.4
0.2
0.5
2.1
5.5
8.2
11.5
Average Morning Relative Humidity
Years on Record: 7
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
%
85
81
83
81
82
89
89
92
93
87
81
82
80
Average Evening Relative Humidity
Years on Record: 7
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
%
66
63
63
61
61
68
72
74
73
66
60
63
63
Average Wind Speed
Years on Record: 28
ANN
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
mph
8.7
6.7
7.5
8.5
9.5
10.4
10.9
11.2
10.5
9.1
7.6
6.3
6.5
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