Willamette Pass
Elevation5,128 ft (1,563 m)[1]
Traversed by OR 58
LocationKlamath / Lane counties, Oregon, U.S.
RangeCascades
Coordinates43°36′01″N 122°02′17″W / 43.60028°N 122.03806°W / 43.60028; -122.03806[1]
Willamette Pass Tunnel in 1940

Willamette Pass (5,128 ft or 1,563 m) is a mountain pass crossing the crest of the Cascade Range in Oregon, United States. It is less commonly known as Willamette Summit.[1][2] The pass is traversed by Oregon Route 58 and by Union Pacific's (ex-Southern Pacific) Cascade Subdivision, which provides rail access between Portland, Oregon, and California. Amtrak's Coast Starlight uses this route on its way between Seattle, Portland, and Los Angeles. The Willamette Pass Resort ski area is located above the pass.[1]

Climate

Climate data for Santiam Pass, Oregon
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 61
(16) 		60
(16) 		69
(21) 		76
(24) 		84
(29) 		91
(33) 		93
(34) 		97
(36) 		93
(34) 		84
(29) 		71
(22) 		59
(15) 		107
(42)
Mean maximum °F (°C) 44
(7) 		46
(8) 		56
(13) 		66
(19) 		75
(24) 		83
(28) 		90
(32) 		87
(31) 		79
(26) 		69
(21) 		55
(13) 		47
(8) 		92
(33)
Mean daily maximum °F (°C) 34.2
(1.2) 		36.7
(2.6) 		41.7
(5.4) 		49.0
(9.4) 		57.7
(14.3) 		64.2
(17.9) 		75.5
(24.2) 		74.2
(23.4) 		64.6
(18.1) 		54.0
(12.2) 		42.8
(6.0) 		36.8
(2.7) 		52.6
(11.4)
Daily mean °F (°C) 28.3
(−2.1) 		30.5
(−0.8) 		33.9
(1.1) 		39.0
(3.9) 		45.9
(7.7) 		51.5
(10.8) 		59.5
(15.3) 		58.3
(14.6) 		51.6
(10.9) 		44.2
(6.8) 		34.9
(1.6) 		31.1
(−0.5) 		42.4
(5.8)
Mean daily minimum °F (°C) 21.1
(−6.1) 		22.5
(−5.3) 		25.4
(−3.7) 		28.9
(−1.7) 		33.8
(1.0) 		38.5
(3.6) 		43.5
(6.4) 		42.9
(6.1) 		38.6
(3.7) 		34.3
(1.3) 		28.0
(−2.2) 		24.0
(−4.4) 		31.8
(−0.1)
Mean minimum °F (°C) 4
(−16) 		6
(−14) 		12
(−11) 		17
(−8) 		25
(−4) 		29
(−2) 		33
(1) 		33
(1) 		29
(−2) 		23
(−5) 		15
(−9) 		9
(−13) 		3
(−16)
Record low °F (°C) −19
(−28) 		−16
(−27) 		−7
(−22) 		6
(−14) 		10
(−12) 		21
(−6) 		27
(−3) 		27
(−3) 		20
(−7) 		4
(−16) 		0
(−18) 		−10
(−23) 		−26
(−32)
Average precipitation inches (mm) 9.72
(247) 		6.21
(158) 		6.51
(165) 		3.51
(89) 		2.85
(72) 		2.10
(53) 		0.50
(13) 		0.85
(22) 		1.92
(49) 		5.12
(130) 		7.88
(200) 		9.89
(251) 		57.06
(1,449)
Average snowfall inches (cm) 59.4
(151) 		61.6
(156) 		57.6
(146) 		39.0
(99) 		13.0
(33) 		0.2
(0.51) 		0.0
(0.0) 		0.0
(0.0) 		0.6
(1.5) 		13.4
(34) 		36.0
(91) 		73.1
(186) 		353.9
(898.01)
Source: [3]


References

  1. ^ a b c d "Willamette Pass". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. November 28, 1980. Retrieved June 4, 2013.
  2. ^ Williams, Gerald W. "Willamette Pass". The Oregon Encyclopedia. Portland State University. Retrieved May 20, 2014.
  3. ^ "Willamette PASS, OR". Western Regional Climate Center. Retrieved November 8, 2023.


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