This is an old revision of this page, as edited by Ssbbplayer (talk | contribs) at 03:36, 1 November 2013 (use absolute monthly values for sunshine hours, not the hko source since their values are not the same as the wmo ones). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
Revision as of 03:36, 1 November 2013 by Ssbbplayer (talk | contribs) (use absolute monthly values for sunshine hours, not the hko source since their values are not the same as the wmo ones)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)| Climate data for Seattle (SeaTac Airport), 1981–2010 normals | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 64 (18) |
70 (21) |
78 (26) |
85 (29) |
93 (34) |
96 (36) |
103 (39) |
99 (37) |
98 (37) |
89 (32) |
74 (23) |
64 (18) |
103 (39) |
| Mean daily maximum °F (°C) | 47.2 (8.4) |
49.9 (9.9) |
53.7 (12.1) |
58.5 (14.7) |
64.7 (18.2) |
69.9 (21.1) |
75.8 (24.3) |
76.3 (24.6) |
70.5 (21.4) |
59.7 (15.4) |
50.9 (10.5) |
45.7 (7.6) |
60.2 (15.7) |
| Daily mean °F (°C) | 42.0 (5.6) |
43.4 (6.3) |
46.5 (8.1) |
50.3 (10.2) |
56.0 (13.3) |
60.9 (16.1) |
65.7 (18.7) |
66.1 (18.9) |
61.3 (16.3) |
52.7 (11.5) |
45.4 (7.4) |
40.6 (4.8) |
52.6 (11.4) |
| Mean daily minimum °F (°C) | 36.9 (2.7) |
36.9 (2.7) |
39.3 (4.1) |
42.2 (5.7) |
47.3 (8.5) |
51.9 (11.1) |
55.6 (13.1) |
55.9 (13.3) |
52.1 (11.2) |
45.8 (7.7) |
40.0 (4.4) |
35.6 (2.0) |
45.0 (7.2) |
| Record low °F (°C) | 0 (−18) |
1 (−17) |
11 (−12) |
29 (−2) |
28 (−2) |
38 (3) |
43 (6) |
44 (7) |
35 (2) |
28 (−2) |
6 (−14) |
6 (−14) |
0 (−18) |
| Average precipitation inches (mm) | 5.56 (141) |
3.50 (89) |
3.72 (94) |
2.71 (69) |
1.93 (49) |
1.56 (40) |
0.70 (18) |
0.88 (22) |
1.45 (37) |
3.48 (88) |
6.57 (167) |
5.35 (136) |
37.41 (950) |
| Average snowfall inches (cm) | 1.3 (3.3) |
1.4 (3.6) |
0.7 (1.8) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
1.1 (2.8) |
1.5 (3.8) |
5.9 (15) |
| Average precipitation days (≥ 0.01 in) | 18.2 | 14.7 | 16.9 | 14.3 | 12.0 | 9.1 | 5.0 | 4.8 | 7.9 | 13.1 | 18.4 | 17.6 | 152.0 |
| Average snowy days (≥ 0.1 in) | 1.1 | 0.7 | 0.5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.4 | 1.4 | 4.1 |
| Mean monthly sunshine hours | 69.8 | 108.8 | 178.4 | 207.3 | 253.7 | 268.4 | 312.0 | 281.4 | 221.7 | 142.6 | 72.7 | 52.9 | 2,169.7 |
| Source: NOAA (extremes 1948–present, sun 1961–1990) | |||||||||||||
References
These references will appear in the article, but this list appears only on this page.- "NowData - NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved 2011-12-15.
- "WMO Climate Normals for Seattle/Seattle–Tacoma INTL A, WA 1961–1990". National Oceanic and Atmospheric Administration. Retrieved October 31, 2013.