Cambridge is a city in Washington County, Idaho, United States. It is the second largest city in the county, behind the significantly larger Weiser, the county seat. According to the United States Census Bureau, the city has a total area of 0.49 square miles, of which, 0.48 square miles is land and 0.01 square miles is water.
Cambridge has a dry-summer continental climate (Köppen Dsa), with cold, moist winters, gradual springs, hot and dry summers, and brief autumns. July is the hottest month, with a daily average of 74.1 °F. January is the coldest month, with a daily average of 23.3 °F, and lows falling to 0 °F or below on 9.6 nights per year. Snowfall averages 33 inches per season. Precipitation is usually infrequent and light, especially so during the summer months.
As of the census of 2010, there were 328 people, 151 households, and 100 families residing in the city.