Environmental:

Climate Data
The two weather stations in Colusa County are located in Colusa and Williams. Of these, Colusa reports slightly more precipitation with an annual average of 16.4 inches, while Williams has an average 15.6 inches each year. This makes Colusa County an ideal place for agriculture. The following figure shows the average temperatures and precipitation rates in winter and summer for each weather station in the country.

Air Quality
Colusa County is located in the middle of the Sacramento Valley air basin, along with eleven other counties (Shasta, Tehama, Glenn, Butte, Yuba, Sutter, Yolo, Placer, Sacramento, and the eastern part of Solano County). According to the Air Resources Board, the vehicle miles reveled has increased 95 percent over the last twenty years throughout the air basin.

Delta breezes blowing north from Sacramento often carry air pollution towards Colusa County and east into the Sierra Nevada Foothills. While air pollution has declined overall in the basin over the last twenty years, ozone has not declined as rapidly as other areas of California. As of 2005, air pollutants in Colusa County have not reached attainment status for meeting state and federal standards.

Population   -  Age Distribution  -  Race & Ethnicity - Income
  Environmental  -  Labor Market - Business & Industry