Calculating Standard Deviation

The daily minimum temperatures (°F) in December, 2010
for Indianapolis, IN are: 9, 2, 1, 8, 8, 11, 9, 9, 10, 6, 17, 18, 14, 26, 34, 31, 27, 27, 30, 28, 32, 34, 37, 38, 25, 18, 16, 7, 9, 15, 8.

What is the standard deviation for this data set?