| Month | Average (mean) | Lowest | Highest |
|---|---|---|---|
| January 2011 | 20.31° | -5.8° | 39.2° |
| February 2011 | 25.62° | -7.2° | 53.1° |
| March 2011 | 35.54° | 16.3° | 63.5° |
| April 2011 | 48.18° | 28.4° | 83.7° |
| May 2011 | 60.97° | 32.2° | 94.8° |
| June 2011 | 72.45° | 52.7° | 98.8° |
| July 2011 | 80.16° | 60.3° | 100.4° |
| August 2011 | 74.67° | 56.7° | 97.0° |
| September 2011 | 62.66° | 39.0° | 92.7° |
| October 2011 | 53.85° | 30.6° | 80.4° |
| November 2011 | 41.47° | 20.3° | 64.8° |
| December 2011 | 32.74° | 9.9° | 54.3° |