| Month | Average (mean) | Lowest | Highest |
|---|---|---|---|
| January 2015 | 22.26° | -7.6° | 42.8° |
| February 2015 | 15.88° | -6.3° | 45.1° |
| March 2015 | 36.10° | 1.0° | 70.2° |
| April 2015 | 51.40° | 26.8° | 79.7° |
| May 2015 | 62.93° | 38.1° | 85.6° |
| June 2015 | 70.36° | 44.4° | 91.8° |
| July 2015 | 74.17° | 51.6° | 93.4° |
| August 2015 | 72.49° | 53.2° | 94.3° |
| September 2015 | 69.43° | 46.2° | 92.7° |
| October 2015 | 55.00° | 30.7° | 76.5° |
| November 2015 | 43.86° | 9.3° | 70.9° |
| December 2015 | 37.83° | 14.5° | 60.8° |