Seattle, Wash.
H
I S T O R I C A L
W
E A T H E R
D
A T A
Average Temperature
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
°F
52.8
41.3
44.3
46.6
50.4
56.1
61.4
65.3
65.7
60.8
53.5
46.3
41.6
°C
11
5
6
8
10
13
16
18
18
16
11
7
5
Years Charted: 30
Source:
National Weather Service, San Francisco
Results based on data collected from 1961 - 1990
Average High Temperature
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
°F
59.8
46.1
50.6
53.7
58.1
64.2
69.6
74.1
74.1
68.8
60
51.5
46.2
°C
15
7
10
12
14
17
20
23
23
20
15
10
7
Years Charted: 30
Source:
National Weather Service, San Francisco
Results based on data collected from 1961 - 1990
Average Low Temperature
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
°F
45.8
36.4
38
39.5
42.7
47.9
53.2
56.4
57.2
52.9
46.9
41
37
°C
7
2
3
4
5
8
11
13
14
11
8
5
2
Years Charted: 30
Source:
National Weather Service, San Francisco
Results based on data collected from 1961 - 1990
Highest Recorded Temperature
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
°F
100
66
74
75
87
92
100
100
97
92
82
73
65
°C
37
18
23
23
30
33
37
37
36
33
27
22
18
Years Charted: 60
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Lowest Recorded Temperature
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
°F
9
11
11
22
31
35
42
47
48
40
30
13
9
°C
-12
-11
-11
-5
0
1
5
8
8
4
-1
-10
-12
Years Charted: 60
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Mean Number of Days Below 32°F/0°C
Total
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
Days
19
7
3
1
0
0
0
0
0
0
---
2
5
Years Charted: 43
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Average Snowfall
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
in.
7.1
3
0.9
0.6
0
0
0
0
0
0
0
0.7
1.9
mm
180
76
22
15
0
0
0
0
0
0
0
17
48
Years Charted: 43
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Average Days of Precipitation
Total
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
Days
150
18
16
17
14
11
9
5
6
8
11
18
18
Years Charted: 43
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Days With Sunshine
Year
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
%
43
28
34
42
47
52
49
63
56
53
37
28
23
Years Charted: 31
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Mean Number of Cloudy Days
Total
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
Days
201
23
19
19
16
14
15
9
11
13
18
21
23
Years Charted: 24
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Mean Number of Partly Cloudy Days
Total
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
Days
93
5
6
8
9
10
8
10
10
8
8
6
5
Years Charted: 24
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
Mean Number of Clear Days
Total
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
Days
71
3
3
4
5
7
7
12
10
9
5
3
3
Years Charted: 24
Source:
National Weather Service, San Francisco
Results based on data collected through 1993
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