The climate of Dallas is subtropical, with fairly mild winters and very hot, muggy summers.
The city is located in northern Texas, in the flat part (the eastern one).
Although the winter is mild, from November to March it can get cold at night, and the temperature can drop below freezing. Occasionally, there may be real cold waves, which last a few days, during which the temperature can drop to -10 °C (14 °F), and it can even snow. In January 1982, it went down to as low as -14 °C (7 °F). In February 2011, 28 cm (11 in) of snow fell.
In summer, the combination of high temperature and humidity makes the heat very unpleasant. On the hottest days, it can reach and exceed 40 °C (104 °F).
In 2018, the temperature dropped to -9 °C (16 °F) in January, while it reached 44 °C (111 °F) in July.
From time to time, the city can be reached by the remnants of a hurricane, coming from the Gulf of Mexico or the Pacific. In general, hurricanes weaken when they penetrate inland, however, they can still bring abundant rains. The hurricane season runs from June to November, although they are more likely from August to October, with a peak in September.
The average temperature of the coldest month (January) is of 8.4 °C (47 °F), that of the warmest month (August) is of 30.4 °C (87 °F). Here are the average temperatures.

Precipitation amounts to 955 millimeters (37.6 inches) per year: so, it is at an intermediate level. The rainiest seasons are spring and autumn, due to the clash of air masses. Dallas is located in the "tornado alley", so tornadoes can occasionally occur in the April-June period (and more rarely in autumn). Here is the average precipitation.

On average, there are around 2,850 sunshine hours per year. So Dallas is a sunny city. Here are the average sunshine hours per day.

Best Time

To visit Dallas, you can choose spring and autumn (in particular, from mid-March to mid-April and from mid-October to mid-November), to avoid the summer heat as well as the possible cold in winter.