WeatherArchive / Climate averages / Dallas
Dallas weather by month: climate averages
Dallas averages 67°F (20°C) over the year. August is warmest, with highs around 95°F (35°C); January is coldest, with lows near 39°F (4°C). About 43 inches (1092 mm) of precipitation falls on roughly 94 days a year, from 30 years of ERA5 data (1996–2025).
| Month | Avg high | Avg low | Precip. | Days ≥1 mm | Sunshine / day |
|---|---|---|---|---|---|
| January | 13.4°C | 3.6°C | 72.9 mm | 6.4 | 7.3 h |
| February | 15.5°C | 5.4°C | 81.3 mm | 8.1 | 7.4 h |
| March | 20.1°C | 9.8°C | 104.5 mm | 9.5 | 8.2 h |
| April | 24.2°C | 14.0°C | 116.6 mm | 9.1 | 9.6 h |
| May | 28.3°C | 18.8°C | 140.7 mm | 10.9 | 10.1 h |
| June | 32.2°C | 23.1°C | 100.1 mm | 9.0 | 11.6 h |
| July | 34.7°C | 25.3°C | 49.4 mm | 6.8 | 12.3 h |
| August | 34.9°C | 25.6°C | 66.8 mm | 6.2 | 12.0 h |
| September | 31.2°C | 21.7°C | 74.1 mm | 6.1 | 10.5 h |
| October | 25.7°C | 15.8°C | 108.0 mm | 7.3 | 8.9 h |
| November | 19.3°C | 9.9°C | 95.1 mm | 7.3 | 7.7 h |
| December | 14.6°C | 5.3°C | 82.4 mm | 7.1 | 6.9 h |
Record high 1996–2025: 42.9°C on 2023-08-18. Record low: -18.9°C on 2021-02-16.
Source: Open-Meteo Historical Weather API (CC BY 4.0). Values are ERA5 reanalysis model data on a ~9–25 km grid, not readings from a weather station, so a single town’s thermometer can differ by a few degrees and local showers can be missed. Grid cell 32.79, -96.82 at 137 m. For snowfall, humidity and a best-time-to-visit score, open Dallas in the climate tool.
Dallas weather month by month
The wettest month in Dallas is May, averaging 5.5 in (141 mm); the driest is July at 1.9 in (49 mm). May has the most days with at least 1 mm of rain (about 11). July is the sunniest month, with about 12.3 hours of sunshine a day, against 6.9 hours in December. If you like average highs between 64 °F and 82 °F (18–28 °C) with few rainy days, aim for April, October and November.
Planning a particular day? See how often that date was wet or hot over 30 years with the event weather odds, or look up what the weather actually was on any past date in the historical weather archive.
Questions people ask
What is the warmest month in Dallas?
August, with an average daily high of 95°F (35°C) over 1996–2025.
What is the coldest month in Dallas?
January, when nights average about 39°F (4°C).
What is the rainiest month in Dallas?
May has the most precipitation (about 5.5 in (141 mm)), and May has the most rainy days (about 11 days with 1 mm or more). The driest month is July.
How much sunshine does Dallas get?
About 9.4 hours of bright sunshine a day averaged over the year, from 6.9 h in December to 12.3 h in July. Sunshine here is the model’s estimate of hours with direct sun, not hours of daylight.
What is the best month to visit Dallas for mild weather?
By average high between 64 °F and 82 °F (18–28 °C) and the fewest rainy days: April, October, November. Prices, crowds and events are not included.