Chart of Average Relative Humidity Levels for Dallas/Fort Worth Area based on 38 years of data through 2001
From the National Climatic Data Center; NOAA
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| AM: | 80 | 79 | 79 | 81 | 86 | 85 | 79 | 79 | 83 | 82 | 81 | 80 | 81 |
| PM: | 63 | 61 | 59 | 59 | 63 | 58 | 52 | 52 | 58 | 58 | 60 | 62 | 59 |