We are given the following information
Colorado Spring's lowest temperature = -27 °F
St. Louis' lowest temperature = -22 °F
We are asked to write the temperatures as a comparison (greater than or less than)
Recall that a less negative number is always greater than a more negative number.
So, -22 °F is greater than -27 °F

Therefore, St. Louis' lowest temperature (-22 °F) is greater than Colorado Spring's lowest temperature (-27 °F)