Yellowstone hotspot across southern Idaho, creates a moisture channel that extends from the Pacific Ocean to the Ashton and Yellowstone area. Average monthly precipitation in Ashton shows a transitional regime. Precipitation peaks first in December–January, reflecting influence from Pacific Ocean-originating storms during the winter season, and second in May, reflecting showers and thunderstorms that create a May or June rainfall peak that prevails in nearby Montana and Wyoming. Ashton has relatively drier summers, making this area near the easternmost extent of the typical Pacific Northwest annual precipitation pattern, with its dry summers. Temperature and precipitation Demographics 2010 census At the 2010 census, there were 1,127 people, 397 households and 286 families residing in the city. The population density was . There were 451 housing units at an average density of . The racial make-up was 85.0% White, 0.1% African American, 0.4% Native American, 0.3% Pacific Islander, 12.2% from other races and 2.1% from two or more races. Hispanic or Latino of any race were 17.6% of the population. There were 397 households, of which 39.3% had children under the age of 18 living with them, 57.9% were married couples living together, 8.6% had a female householder with no husband present, 5.5% had a male householder with no wife present, and 28.0% were non-families. 24.9% of all households were made up of individuals, and 12.8% had someone living alone who was 65 years of age or older. The average household size was 2.77 and the average family size was 3.34. The median age was 33.4 years. 32.4% of residents were under the age of 18; 7% were between the ages of 18 and 24; 23.5% were from 25 to 44; 21.1% were from 45 to 64; and 16% were 65 years of age or older. The gender make-up was 49.1% male and 50.9% female. 2000 census At of the 2000 census, there were 1,129 people, 395 households and 285 families residing in the city. The population density was . There were 466 housing units at an average density of . The racial make-up was 86.71% White, 0.44% African American, 0.53% Native American, 0.09% Asian, 11.43% from other races and 0.80% from two or more races. Hispanic or Latino of any race were 13.91% of the population. There were 395 households, of which 38.0% had children under the age of 18 living with them, 60.3% were married couples living together, 7.8% had