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Köppen climate types of Idaho, using 1991-2020 climate normals.. Idaho's climate varies widely. Although the state's western border is about 330 miles (530 km) from the Pacific Ocean, the maritime influence is still felt in Idaho; especially, in the winter when cloud cover, humidity, and precipitation are at their maximum extent.
For instance, northern Idaho experiences more precipitation in rain and snow than eastern Washington from weather systems originating from the Pacific Ocean because it is on the windward side of the Rocky Mountains. [78] Average annual rainfall is 25 inches (64 cm) and the average annual snowfall is 46 inches (120 cm). [79]
The wettest month was December 1933 with 11.99 inches (304.5 mm) of total precipitation and the most monthly snowfall 68.8 inches (174.8 cm) in January 1969. [ 14 ] Climate data for Sandpoint, Idaho (Sandpoint Experiment Station) (1991–2020 normals, extremes 1910–present)
The Great Basin and Columbia Plateau (the Intermontane Plateaus) are arid or semiarid regions, with high summer temperatures in the 90s to occasionally over 100 at lower elevations (e.g. at Boise, Idaho), with annual precipitation averaging less than 15 inches (380 mm) as a result of the rain shadow of the Sierra Nevada and Cascades.
In northern Idaho rainforest patches along the Clearwater River, a mean annual temperature of 5.4°C has been measured. [8] In British Columbian Inland rainforest areas, the mean annual temperature ranges from 2.7 to 4.5°C. In the coldest months, the mean temperature of these region lies between -8 and -9.5°C. [9]
Idaho (/ ˈ aɪ d ə h oʊ / ⓘ EYE-də-hoh) is a landlocked state in the Pacific Northwest and Mountain West subregions of the Western United States.It borders Montana and Wyoming to the east, Nevada and Utah to the south, and Washington and Oregon to the west; it shares a small portion of the Canada–United States border to the north, with the province of British Columbia.
66000308. The City of Rocks National Reserve, also known as the Silent City of Rocks, is a United States National Reserve and state park in south-central Idaho, approximately 2 miles (3.2 km) north of the border with Utah. It is widely known for its enormous granite rock formations and excellent rock climbing.
For example, based on projections made by the Intergovernmental Panel on Climate Change and results from the United Kingdom Hadley Centre’s climate model (HadCM2), a model that accounts for both greenhouse gases and aerosols, by 2100 temperatures in Idaho could increase by 5°F (with a range of 2-9°F) in winter and summer and 4°F (with a ...