Dallas climate
Dallas (Texas, United States) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 19 °C66 °F, and about 922 mm36 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Dallas climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 1355 | 134 | 744 | 582.3 | 14 |
| Feb | 1559 | 337 | 948 | 672.6 | 9 |
| Mar | 2068 | 846 | 1457 | 883.5 | 2 |
| Apr | 2577 | 1254 | 1966 | 833.2 | 0 |
| May | 2984 | 1864 | 2374 | 1164.6 | 0 |
| Jun | 3492 | 2272 | 2882 | 963.8 | 0 |
| Jul | 3697 | 2476 | 3086 | 552.2 | 0 |
| Aug | 3697 | 2476 | 3087 | 622.5 | 0 |
| Sep | 3290 | 2068 | 2679 | 773.0 | 0 |
| Oct | 2679 | 1356 | 2067 | 1024.0 | 0 |
| Nov | 1967 | 745 | 1356 | 572.3 | 2 |
| Dec | 1457 | 236 | 846 | 612.4 | 10 |
| Year | 3697 | 134 | 1966 | 92236 | 37 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 73% | 50% | 2.9 | 10:13 |
| Feb | 74% | 57% | 3.3 | 10:58 |
| Mar | 73% | 55% | 4.4 | 11:53 |
| Apr | 72% | 53% | 5.4 | 12:57 |
| May | 72% | 55% | 5.8 | 13:50 |
| Jun | 67% | 44% | 6.7 | 14:18 |
| Jul | 61% | 41% | 6.7 | 14:06 |
| Aug | 58% | 38% | 6.2 | 13:21 |
| Sep | 63% | 38% | 5.2 | 12:19 |
| Oct | 66% | 39% | 4.1 | 11:18 |
| Nov | 71% | 45% | 3.1 | 10:25 |
| Dec | 73% | 52% | 2.6 | 9:00 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Dallas is like
The warmest month is August, with an average high of 36 °C97 °F and a low of 24 °C76 °F. The coldest is January, when highs average 13 °C55 °F and lows 1 °C34 °F. Seasons are strongly marked: the warmest month is on average 23.6 °C42.6 °F warmer than the coldest.
Annual precipitation is moderate at about 922 mm36 in. The wettest three-month stretch is April–June, which brings 32% of the annual total. The wettest month is May (116 mm4.6 in), the driest is July (55 mm2.2 in).
Relative humidity ranges from 58% in August to 74% in February. The clearest skies (lowest average cloud amount, 38%) are typical of September. Average wind speed near the ground ranges from 9 km/h (6 mph) in August to 13 km/h (8 mph) in April. Daylight lasts from about 10.0 hours in December to 14.3 hours in June.
Best time to visit Dallas
Based on these averages, the most comfortable months for sightseeing and outdoor activities are March and April and October and November: average highs of 19 °C67 °F to 26 °C79 °F with 57 mm2.3 in to 102 mm4.0 in of precipitation per month.
The most challenging month is August, which is hot, with average highs of 36 °C97 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Dallas
- Winter (December–February) — highs 1355 to 15 °C59 °F, lows 134 to 3 °C37 °F, about 62 mm2.4 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 2068 to 29 °C84 °F, lows 846 to 18 °C64 °F, about 96 mm3.8 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
- Summer (June–August) — highs 3492 to 36 °C97 °F, lows 2272 to 24 °C76 °F, about 71 mm2.8 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Autumn (September–November) — highs 1967 to 32 °C90 °F, lows 745 to 20 °C68 °F, about 79 mm3.1 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
How Dallas compares
Compared with Houston, about 363 km to the southeast, Dallas is on average 1.7 °C3.1 °F cooler and receives 26% less precipitation (922 mm36 in vs 1,247 mm49 in). The difference is largest in December (3.9 °C7.1 °F cooler).
Of the 222 places in the United States covered by World Climates, Dallas is the 54th warmest by annual mean temperature and the 125th wettest by annual precipitation. See all of them on the United States climate page.
Places in other countries with the most similar temperature and rainfall pattern: Yongzhou (China, Cfa), Hongjiang (China, Cfa) and Hengyang (China, Cfa).
The same NASA POWER grid cell also contains Garland (pop. 236,897), Irving (pop. 236,607), Mesquite (pop. 144,788), Carrollton (pop. 133,168) and Richardson (pop. 110,815). Their long-term averages in this dataset are essentially the same as for Dallas, so they do not have separate pages.
Nearby places
- Grand Prairie 18 km · 19 °C66 °F · 935 mm37 in
- Plano 28 km · 18 °C65 °F · 922 mm36 in
- Arlington 29 km · 19 °C66 °F · 935 mm37 in
- Fort Worth 49 km · 19 °C66 °F · 869 mm34 in
- Denton 57 km · 18 °C65 °F · 922 mm36 in
- Waco 141 km · 20 °C67 °F · 946 mm37 in
- Tyler 149 km · 18 °C65 °F · 1,179 mm46 in
- Wichita Falls 201 km · 18 °C65 °F · 769 mm30 in
Frequently asked questions
What is the warmest month in Dallas?
August is the warmest month in Dallas, with an average high of 36 °C (97 °F) and an average low of 24 °C (76 °F).
What is the coldest month in Dallas?
January is the coldest month, with an average high of 13 °C (55 °F) and an average low of 1 °C (34 °F).
When does it rain the most in Dallas?
May is the wettest month with about 116 mm (4.6 in) of precipitation; July is the driest with about 55 mm (2.2 in).
What is the best time to visit Dallas?
Judging by long-term averages, the most comfortable months are March and April and October and November.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 184 m, while Dallas lies at about 128 m. Temperatures on this page were therefore adjusted by +0.4 °C0.6 °F using the standard lapse rate of 6.5 °C per 1,000 m.