Weather in Dallas

Dallas is in United States at 32.8°N. The 2001–2020 NASA POWER daily record describes a humid subtropical climate. August is the warmest month (average 30.2°C, high 36.2°C) and January is the coolest (average 7.0°C, low 1.0°C).

Rain is wet season runs from May to June, inside an annual total of 922 mm. The wettest month is May at 116 mm; the driest is July at 56 mm. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are May, September, and October.

Rainfall pattern

The wet season in Dallas starts in May and ends in June (May and June). May is the core of it at 116 mm. July is the other extreme, with 56 mm.

Humidity peaks near 74%. That usually lines up with the wetter months rather than the hottest ones.

Temperature through the year

The heat peaks in August, when the typical afternoon is 36.2°C. The opposite pole is January, when mornings average 1.0°C.

Across the year the mean afternoon high is 24.8°C. If you want the smallest day–night shock, look at months where the high and low sit close together; August nights still hold 24.3°C.

What stands out month by month

The year bottoms out in January. Plan for 1.0°C at night and 12.9°C in the afternoon. February stands apart from the months beside it: 14.9°C / 2.9°C and 67 mm. March brings 88 mm and 9 rainy days; temperatures run from 7.8°C to 20.0°C. In April, Dallas averages 24.5°C by day and 12.1°C at night, with 83 mm of rain. The wet season opens in May. Expect 116 mm and 12 rainy days, with nights around 17.2°C. June closes the wet season: 96 mm over 11 rainy days, then the calendar dries.

July is the driest month, averaging only 56 mm across 9 rainy days. Highs sit near 35.9°C. August is the warmest month. Afternoon highs average 36.2°C and nights settle near 24.3°C, with 62 mm of rain. September: 32.1°C high, 20.2°C low, 77 mm rain, 63% humidity. October brings 102 mm and 8 rainy days; temperatures run from 13.3°C to 26.2°C. November stands apart from the months beside it: 19.5°C / 7.4°C and 57 mm. December: 14.0°C high, 2.3°C low, 61 mm rain, 73% humidity.

When the score favours a visit

The three months with the highest comfort score are May, September, and October: May (22.9°C average, 116 mm, 73% humidity); September (26.1°C average, 77 mm, 63% humidity); October (19.7°C average, 102 mm, 66% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the wet season itself — fewer crowds, greener landscape, heavier rain — aim at May–June instead of the score.

Dallas and other cities in United States

Houston is about 363 km away: Dallas is 0.6°C warmer than Houston in its hottest month and 325 mm drier over the year than Houston. Houston’s wettest month is October (128 mm) versus May here.

San Antonio is about 407 km away: Dallas is about as warm as San Antonio at the hot peak and 143 mm wetter over the year than San Antonio. San Antonio’s wettest month is May (100 mm) versus May here.

Chicago is about 1291 km away: Dallas is 7.6°C warmer than Chicago in its hottest month and 59 mm drier over the year than Chicago. Chicago’s wettest month is May (117 mm) versus May here.