| Month | Average (mean) | Lowest | Highest |
|---|---|---|---|
| January 2018 | 22.91° | -9.8° | 52.7° |
| February 2018 | 26.30° | -4.2° | 58.5° |
| March 2018 | 36.74° | 19.0° | 57.9° |
| April 2018 | 41.84° | 18.1° | 80.6° |
| May 2018 | 68.03° | 40.5° | 97.9° |
| June 2018 | 73.04° | 52.7° | 96.1° |
| July 2018 | 75.96° | 57.7° | 96.8° |
| August 2018 | 75.18° | 56.7° | 92.5° |
| September 2018 | 67.51° | 38.8° | 90.0° |
| October 2018 | 51.39° | 25.5° | 84.4° |
| November 2018 | 34.37° | 16.9° | 54.1° |
| December 2018 | 31.77° | 14.5° | 50.5° |