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Revision as of 22:13, 2 February 2014 editOHWiki (talk | contribs)Extended confirmed users4,950 edits minor fixes to match ref. for 1981-2010 averages← Previous edit Revision as of 15:39, 13 February 2014 edit undoLieutenant of Melkor (talk | contribs)Autopatrolled, Pending changes reviewers20,031 edits Reverted to revision 579696505 by Ssbbplayer (talk): Please refer to "Daily/Monthly Normals" which include data smoothing, something "Averages" does not. (TW)Next edit →
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|single line = Y |single line = Y
|collapsed = Y |collapsed = Y
|Jan high F = 46.8 |Jan high F = 47.2
|Feb high F = 49.6 |Feb high F = 49.9
|Mar high F = 53.4 |Mar high F = 53.7
|Apr high F = 58.1 |Apr high F = 58.5
|May high F = 64.3 |May high F = 64.7
|Jun high F = 69.6 |Jun high F = 69.9
|Jul high F = 75.5 |Jul high F = 75.8
|Aug high F = 75.9 |Aug high F = 76.3
|Sep high F = 70.1 |Sep high F = 70.5
|Oct high F = 59.3 |Oct high F = 59.7
|Nov high F = 50.5 |Nov high F = 50.9
|Dec high F = 45.3 |Dec high F = 45.7
|year high F= 59.9 |year high F= 60.2
|Jan mean F= 41.8 |Jan mean F= 42.0
|Feb mean F= 43.2 |Feb mean F= 43.4
|Mar mean F= 46.3 |Mar mean F= 46.5
|Apr mean F= 50.2 |Apr mean F= 50.3
|May mean F= 55.8 |May mean F= 56.0
|Jun mean F= 60.7 |Jun mean F= 60.9
|Jul mean F= 65.5 |Jul mean F= 65.7
|Aug mean F= 65.9 |Aug mean F= 66.1
|Sep mean F= 61.1 |Sep mean F= 61.3
|Oct mean F= 52.6 |Oct mean F= 52.7
|Nov mean F= 45.3 |Nov mean F= 45.4
|Dec mean F= 40.4 |Dec mean F= 40.6
|year mean F= 52.4 |year mean F= 52.6
|Jan low F = 36.8 |Jan low F = 36.9
|Feb low F = 36.9 |Feb low F = 36.9
|Mar low F = 39.3 |Mar low F = 39.3

Revision as of 15:39, 13 February 2014

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.
  1. "NowData - NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved 2011-12-15.
  2. "WMO Climate Normals for Seattle/Seattle–Tacoma INTL A, WA 1961–1990". National Oceanic and Atmospheric Administration. Retrieved October 31, 2013.
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