Dallas weather in December
December in Dallas: cool, a little rain, with clean air — a great time to visit.
#5 of 12 months in Dallas · #184 of 604 destinations to visit in December · comfort 78/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Dallas climate normals — December
| Daytime high | 17°C / 63°F | 🙂 cool |
|---|---|---|
| Nighttime low | 7°C / 45°F | |
| Feels like (high) | 15°C / 59°F | |
| Rainfall | 55 mm / 2.2 in | 🌦 some rain |
| Rainy days | 6 days | |
| Humidity | 67% | 💧 humid |
| Dew point | 4°C / 39°F | |
| Sunshine | 7 h/day | |
| Daylight | 10 h | |
| Wind | 20 km/h / 13 mph | |
| Air quality (US AQI) | 36 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Dallas in December — FAQ
- Is December a good time to visit Dallas?
- December in Dallas: cool, a little rain, with clean air — a great time to visit. It ranks #5 of 12 months for Dallas on SeasonMap's comfort score (78/100).
- What is the weather like in Dallas in December?
- In December, Dallas averages a daily high of 17°C and a low of 7.4°C, with about 54.8 mm of rain over roughly 6.4 rainy days.
- What is the air quality in Dallas in December?
- Dallas has a mean US Air Quality Index of about 36 in December.