Dallas, TX Weather
Dallas hourly forecast: next 24 hours
Today's high of 98°F (37°C) is about 9°F (5°C) above the typical September high of 89°F (32°C).
Current conditions in detail
Dallas weather tomorrow (Friday, September 18)
Tomorrow in Dallas looks sunny, with a high of 99° and an overnight low of 82°. Rain is unlikely (1% chance). Winds top out near 10 mph, and the UV index reaches 8 (very high).
Dallas 14-day forecast
About the weather in Dallas
A 22°C spread between its warmest and coolest months puts Dallas among the more strongly seasonal places we cover. July averages 95°F (35°C) by day; January averages 56°F (13°C), with nights at 38°F (3°C).
Dallas weather: quick facts
- Hottest month: July - highs near 95°F (35°C)
- Coldest month: January - highs near 56°F (13°C)
- Decade extremes (2015-2024): 109°F (43°C) high · -2°F (-19°C) low
- Wettest month: May (14 rainy days) · Sunniest: July (12.2 h sun/day)
- Climate type: humid subtropical
- Annual swing: 22°C between the average warmest and coolest month · day to night: 10°C
- Months averaging 30°C or hotter: 4
- Average humidity: 66%
Temperatures through the year
January bottoms out at 56°F (13°C) in daylight, 38°F (3°C) after dark. At its warmest, in July, Dallas runs to 95°F (35°C) in the afternoon and back to 78°F (25°C) by dawn. The gridded 2015-2024 daily record for this location tops out at 109°F (43°C) and bottoms at -2°F (-19°C) - decade extremes, not all-time station records. Snowfall is rare but not unheard of.
Rain, sun and snow
July is the brightest month at 12.2 hours of sun a day, against an annual average of 9.2. Four of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is March through April. Average highs hold at or above 30°C for 4 months of the year, June through September being the unbroken run.
Season by season
Spring (March through May)
Spring is mild and warm here - highs near 76°F (24°C), nights near 57°F (14°C), and rain falls on around 37 of the 90 days.
Summer (June through August)
Summer in Dallas runs at full heat, with daytime highs averaging 93°F (34°C) and nights around 76°F (25°C); expect showers on roughly 28 days across the season. Daylight is generous - around 11.7 hours of sun a day.
Fall (September through November)
Through fall, Dallas is mild and warm: 78°F (26°C) by day, 61°F (16°C) after dark, and expect showers on roughly 24 days across the season.
Winter (December through February)
Winter in Dallas stays on the cool side of mild, with daytime highs averaging 59°F (15°C) and nights around 41°F (5°C); expect showers on roughly 24 days across the season.
Average temperatures in Dallas by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 56° | 38° | 7 | 2.6 in | 7.3 h/day | 65% |
| February | 60° | 41° | 9 | 4.1 in | 7.1 h/day | 67% |
| March | 69° | 51° | 11 | 4.7 in | 8.1 h/day | 67% |
| April | 75° | 56° | 12 | 6.2 in | 9.2 h/day | 67% |
| May | 83° | 65° | 14 | 7.7 in | 9.5 h/day | 73% |
| June | 90° | 73° | 10 | 4.9 in | 11.4 h/day | 69% |
| July | 95° | 78° | 9 | 2.5 in | 12.2 h/day | 61% |
| August | 95° | 78° | 9 | 4.3 in | 11.6 h/day | 60% |
| September | 89° | 72° | 8 | 3.9 in | 10.4 h/day | 63% |
| October | 79° | 61° | 8 | 6.2 in | 9.2 h/day | 61% |
| November | 67° | 49° | 8 | 4.4 in | 7.5 h/day | 69% |
| December | 60° | 43° | 8 | 3.4 in | 6.9 h/day | 69% |