POPULATION FIGURES
From the U.S. Census Information
| Year | Clear Lake | County | Iowa |
| 2010 | 7,777 | NA | NA |
| 2000 | 8,161 | 46,447 | 2,926,324 |
| 1990 | 8,183 | 46,733 | 2,776,775 |
| 1980 | 7,458 | 48,458 | 2,913,808 |
CLIMATE INFORMATION
| Average summer temperature | 70.3° |
| Average winter temperature | 16.7° |
| Average rainfall | 32.7" |
| Average snowfall | 37.6" |