Hillsboro, OR & Surrounding Areas
Hillsboro is the fifth-largest city in the U.S. state of Oregon and is the county seat of Washington County. Situated in the Tualatin Valley on the west side of the Portland metropolitan area, the city hosts many high-technology companies, such as Intel, locally known as the Silicon Forest.
For thousands of years, the Atfalati tribe of the Kalapuya lived in the Tualatin Valley near the later site of Hillsboro. The climate, moderated by the Pacific Ocean, helped make the region suitable for fishing, hunting, food gathering, and agriculture.
Summers in Hillsboro are generally warm, but temperatures year-round are moderated by a marine influence from the Pacific Ocean. The Willamette Valley in which Hillsboro lies receives the majority of its precipitation during the winter months, with the wettest period from November through March. This occasionally includes snowfall. Hillsboro receives precipitation on 161 days per year, on average.