Dallas Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Dallas, Texas during each month of the year.
The average high and low temperatures are listed below by month and annually for Dallas, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 80, 90 or 100 °F each month in Dallas, scroll down farther. There are also counts of nights with warm temperatures and days with cold weather.
The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1991 to 2020 weather.
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 57 | 37 | January | 14 | 3 |
| 61 | 41 | February | 16 | 5 |
| 71 | 50 | March | 21 | 10 |
| 78 | 58 | April | 26 | 14 |
| 85 | 66 | May | 30 | 19 |
| 94 | 75 | June | 34 | 24 |
| 97 | 78 | July | 36 | 26 |
| 98 | 79 | August | 37 | 26 |
| 92 | 72 | September | 33 | 22 |
| 80 | 59 | October | 27 | 15 |
| 68 | 48 | November | 20 | 9 |
| 60 | 41 | December | 15 | 5 |
| 78 | 59 | Year | 26 | 15 |
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 58 | 38 | January | 14 | 3 |
| 62 | 42 | February | 17 | 6 |
| 70 | 49 | March | 21 | 10 |
| 77 | 57 | April | 25 | 14 |
| 85 | 66 | May | 29 | 19 |
| 93 | 74 | June | 34 | 23 |
| 97 | 78 | July | 36 | 25 |
| 97 | 77 | August | 36 | 25 |
| 90 | 70 | September | 32 | 21 |
| 80 | 59 | October | 26 | 15 |
| 68 | 48 | November | 20 | 9 |
| 59 | 40 | December | 15 | 4 |
| 78 | 58 | Year | 26 | 15 |
Days of Hot Weather in Dallas
For most of May to September, Dallas has daily temperatures of at least 80 °F. Typically 22 of those days have 100-plus degree weather.
| 80 °F 27 °C |
90 °F 32 °C |
100 °F 38 °C |
|
|---|---|---|---|
| January | 1 | 0 | 0 |
| February | 2 | 0 | 0 |
| March | 5 | 0 | 0 |
| April | 13 | 1 | 0 |
| May | 25 | 8 | 0 |
| June | 30 | 22 | 2 |
| July | 31 | 29 | 8 |
| August | 31 | 28 | 11 |
| September | 27 | 17 | 2 |
| October | 17 | 4 | 0 |
| November | 3 | 0 | 0 |
| December | 1 | 0 | 0 |
| Year | 184 | 108 | 22 |
Number of Warm Nights a Month
Most summer nights in Dallas stay above 69 °F. From April to October, the nighttime temperature remains above 39 degrees.
| 50 °F 10 °C |
60 °F 16 °C |
70 °F 21 °C | |
|---|---|---|---|
| January | 3 | 1 | 0 |
| February | 5 | 1 | 0 |
| March | 14 | 4 | 0 |
| April | 23 | 11 | 1 |
| May | 30 | 25 | 8 |
| June | 30 | 30 | 23 |
| July | 31 | 31 | 30 |
| August | 31 | 31 | 29 |
| September | 30 | 27 | 16 |
| October | 25 | 14 | 3 |
| November | 11 | 4 | 0 |
| December | 4 | 1 | 0 |
| Year | 238 | 178 | 111 |
How Often Dallas Has Cold Temperatures
Freezing overnight temperatures can happen in Dallas anytime from November to March, normally totalling 23 days a year. Typically one or two nights a winter, have lows that drop down to 20 degrees Fahrenheit or less.
Most frosty nights in Dallas are followed by daytime thaws. Only on one or two days a year, typically, does the day's high stay below freezing.
| 20 °F -8 °C |
32 °F 0 °C |
40 °F 4 °C |
|
|---|---|---|---|
| January | 1 | 9 | 20 |
| February | 0 | 5 | 13 |
| March | 0 | 1 | 5 |
| April | 0 | 0 | 1 |
| May | 0 | 0 | 0 |
| June | 0 | 0 | 0 |
| July | 0 | 0 | 0 |
| August | 0 | 0 | 0 |
| September | 0 | 0 | 0 |
| October | 0 | 0 | 1 |
| November | 0 | 2 | 8 |
| December | 0 | 7 | 18 |
| Year | 2 | 23 | 65 |
References
Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.
NOAA National Centers for Environmental Information (NCEI). Climate Normals.