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As required by Section R302.2, the heating or cooling outdoor design temperatures shall be selected from Appendix Table RC-1.

TABLE RC-1

OUTDOOR DESIGN TEMPERATURES

LOCATION OUTDOOR DESIGN
TEMP HEATING (°F)
OUTDOOR DESIGN
TEMP COOLING (°F)
Aberdeen 20NNE 25 83
Anacortes 24 72
Anatone -4 89
Auburn 25 84
Battleground 19 91
Bellevue 24 83
Bellingham 2N 19 78
Blain 17 73
Bremerton 29 83
Burlington 19 77
Chehalis 21 87
Chelan 10 89
Cheney 4 94
Chesaw -11 81
Clarkston 10 94
Cle Elum 1 91
Colfax 1NW 2 94
Colville AP -2 92
Concrete 19 83
Connell 4NNW 6 100
Cougar 5E 25 93
Dallesport AP 14 99
Darrington RS 13 85
Davenport 5 92
Edmonds 24 82
Ellensburg AP 2 90
Elma 24 88
Ephrata AP 7 97
Everett Paine AFB 21 79
Forks 1E 23 81
Glacier RS 13 82
Glenoma (Kosmos) 18 89
Goldendale 7 94
Grays River Hatchery 24 86
Greenwater 1.4 84
Grotto 21 84
Hoquiam AP 26 79
Inchelium 2NW 0 92
John Day Dam 19 100
Long Beach 3NNE 25 77
Longview 24 87
Lower Granite Dam 14 98
Lower Monument Dam 18 103
Marysville 23 79
Metaline Falls -1 89
Methow 2W 1 89
Nespelem 2S -4 93
Newhalem 19 89
Newport -5 92
Northport 2 92
Oak Harbor 16 74
Odessa 7 100
Olga 2SE 24 71
Olympia AP 17 85
Omak 2NW 3 90
Oroville 5 93
Othello 9 98
Packwood 16 90
Plain -3 89
Pleasant View 16 98
Pomeroy 3 95
Port Angeles 28 75
Port Townsend 25 76
Prosser 12 97
Puyallup 19 86
Quilcene 2SW 23 83
Quinault RS 25 84
Rainier, Longmire 15 85
Paradise RS 8 71
Raymond 28 81
Redmond 17 83
Republic -9 87
Richland 11 101
Ritzville 6 99
Satus Pass 10 90
Seattle: SeaTac AP 24 83
Sedro Woolley 1E 19 78
Sequim 23 78
Shelton 23 85
Smyrna 8 102
Snohomish 21 81
Snoqualmie Pass 6 80
Spokane AP 4 92
Spokane CO 10 96
Stampede Pass 7 76
Stehekin 3 NW 12 85
Stevens Pass 6 77
Tacoma CO 29 82
Tatoosh Island 31 63
Toledo AP 17 84
Vancouver 22 88
Vashon Island 28 78
Walla Walla AP 6 96
Waterville 1 88
Wellpinit 1 93
Wenatchee CO 10 92
Whidbey Island 11 71
Willapa Harbor 26 81
Wilson Creek 3 96
Winthrop 1WSW -12 91
Yakima AP 11 94

For SI: °C = [(°F) - 32]/1.8.

ABBREVIATIONS:

  • AFB = Air Force Base; AP = Airport; CO = City Office;
  • RS = Ranger Station.

Typical: "4 (miles) NE"

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