![]() ![]() No matter what time of year, it is important to be prepared for the weather in Washington on Interstate I-5. There can also be high winds in the winter due to storms coming in off the coast. The high mountains also create a wind tunnel effect, which can cause windy conditions all year long. The area can be quite wet, especially in the winter and spring. The Cascade Mountains provide a barrier to the moist Pacific air. The area is known for heavy rains throughout the year. In the winter, temperatures can dip below freezing and snow is common. The nights are usually still warm and pleasant. In the summer, temperatures can reach into the 90s with some humidity. The weather in Washington on Interstate I-5 varies depending on the season. Heavy snow is common from November through April. The pass sits 4,310 feet above sea level and the pass experiences a 2,300 foot elevation change within a 6 mile span. Heavy fog is also common throughout this area.īetween the border of Oregon and California, I-5 crosses its highest point over the pass of Siskiyou Summit. Rainfall plus snowfall in some areas average up to 167 inches of rain each year. The Pacific Northwest experiences heavy rainfall throughout the year, as a natural rainforest climate zone stretching from the Canadian border, through Washington, and ending south of Portland, Oregon. At the northern border, at the Peach Arch Border Crossing into Canada, about 4,800 cars cross the border every day (trucks are prohibited at this crossing and must cross the Pacific Highway Border Crossing roughly one mile to the east). At the San Ysidro Port of Entry at the Mexico border, over 70,000 vehicles cross the border every day. It passes through Seattle, Washington, Portland, Oregon, and Sacramento, Los Angeles, and San Diego, California. Interstate I-5 passes through many of the largest cities of the west coast. Along the way, it crosses through the states of Washington, Oregon, and California, running 1,381 miles in length. It is the only interstate in the US that connects from a border crossing of Canada to a border crossing of Mexico. It runs north-south from Blaine, Washington, to Chula Vista, California (near San Diego). Interstate I-5 is the main arterial interstate for the west coast of the United States. ![]() Motorists can check current highway closures at .gov (the QuickMap app is available free for iPhone and Android devices) or by calling 1-80.Ĭaltrans will post updates on Twitter at Anyone without a Twitter account may view the information online at Ĭaltrans reminds motorists to “Be Work Zone Alert” and “Slow for the Cone Zone.Road Trip and Weather Conditions for Interstate I-5 Caltrans will construct permanent repairs in the future.Ĭaltrans strongly advises motorists to allow extra travel time and expect delays in both directions on I-5 in northern Los Angeles County due to multiple weather-related slides. This emergency project will control damage at the landslide, located at postmile 66.57 north of Templin Highway. Southbound I-5 has four lanes, which have been reduced to only two lanes where the landslide undermined the shoulder of the highway. Southbound I-5 will remain open south of Templin Highway. Northbound I-5 is not involved in these weekend closures. Monday if needed to complete the planned work. Southbound I-5 will be closed from 11:00 p.m. Sunday Night and Monday Morning, April 2-3: Southbound I-5 will be closed from 10:00 p.m. Saturday Night and Sunday Morning, April 1-2: The following schedule is subject to change due to weather or operational reasons. The Southbound I-5 Smokey Bear Road and Vista Del Lago Road off-ramps will stay open, but the southbound on-ramps will be closed at both locations. Southbound traffic will detour east on State Route 138 and south on State Route 14 to Southbound I-5. Southbound I-5 will be fully closed between Vista Del Lago Road and Templin Highway. ![]()
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