Dallas is warmest in August, averaging 38° by day and 25° at night. The wettest month is May with 149 mm, and the year brings about 883 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 13° | 1° | 43 mm | 10.1 h | Mild |
| February | 15° | 3° | 56 mm | 10.8 h | Mild |
| March | 22° | 8° | 90 mm | 11.8 h | Sightseeing |
| April | 25° | 12° | 96 mm | 12.8 h | Sightseeing |
| May | 29° | 17° | 149 mm | 13.7 h | Mild |
| June | 34° | 22° | 78 mm | 14.1 h | Beach weather |
| July | 37° | 24° | 37 mm | 14.0 h | Very hot |
| August | 38° | 25° | 62 mm | 13.2 h | Very hot |
| September | 33° | 21° | 60 mm | 12.2 h | Beach weather |
| October | 28° | 14° | 90 mm | 11.2 h | Beach weather |
| November | 20° | 7° | 57 mm | 10.3 h | Sightseeing |
| December | 17° | 3° | 65 mm | 9.8 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: June, September and October — highs around 32°, nights no colder than 14°, and at most 90 mm of rain in a month.
Walking the city: March, April, November and December — highs of 17–25° and no more than 96 mm of rain a month.
Serious heat: In July and August the average high reaches 38°.