Online Highways Home > Washington > Priest Rapids Dam Weather Station of the U.S. Weather Service Located in Grant County, Washington, Priest Rapids Dam is at an elevation of 460 feet and was established as a weather station on 01 Dec 1956. From 1971 to 2000, the following average readings were recorded: - - - - - - - - - JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR Average High....... 40.3 47.1 57.5 66.4 75.4 82.8 90.9 90.3 80.2 66.0 49.7 40.5 65.6 Average Low........ 25.7 29.6 35.8 42.3 50.4 57.2 63.3 63.3 54.5 42.7 33.5 26.6 43.7 Monthly Precipitn.. .82 .66 .66 .43 .42 .40 .19 .27 .34 .46 1.02 1.17 6.84 Heating Degree Days 993 746 568 325 119 36 3 5 76 332 701 976 4880 Cooling Degree Days 0 0 0 6 54 185 378 370 147 2 0 0 1142 Plan your vacation to the Pacific Northwest with a packet of information in the mail and you may win a $200 gift certificate courtesy of our sponsors. See more Science. The Most Anticipated Upcoming Washington Events Are: Christmas Lighting Festival Leavenworth December 18 thru December 20 Fireworks At Midnight over the Ocean Long Beach December 31 Red Wine and Chocolate, Yakima Valley Yakima February 13 thru February 15 Fall Salmon Tour Poulsbo continuing thru November 25 A Vintage Christmas Craft & Gift Show Spokane December 4 thru December 6 Other upcoming events include: Lighted Boat Parade and Crab Pot Christmas Tree Ilwaco December 5 Winter Boat Expo Pasco February 4 thru February 7 When Animals Were People Puppet Show Va February 6 Vashon Island Art Studio Tour Vashon Island December 5 thru December 13 The Messiah Wenatchee December 6

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