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Dallas vs Las Vegas weather: climate comparison
Las Vegas is the warmer of the two, averaging 68°F (20°C) over the year against 67°F (20°C) in Dallas. Dallas is wetter, with 43.0 in (1092 mm) of precipitation a year to Las Vegas's 5.2 in (131 mm). Below: every month side by side, from 30 years of ERA5 data (1996–2025).
- Mean temperature
- 19.7°C Dallas
20.2°C Las Vegas - Annual precipitation
- 1091.9 mm Dallas
130.9 mm Las Vegas - Rainy days a year
- 94 Dallas
25 Las Vegas - Sunshine per day
- 9.4 h Dallas
11.3 h Las Vegas
Month by month
| Month | Dallas | Las Vegas |
|---|---|---|
| January | 13.4°C | 14.1°C |
| February | 15.5°C | 16.3°C |
| March | 20.1°C | 20.9°C |
| April | 24.2°C | 25.4°C |
| May | 28.3°C | 30.8°C |
| June | 32.2°C | 36.8°C |
| July | 34.7°C | 39.5°C |
| August | 34.9°C | 38.2°C |
| September | 31.2°C | 33.9°C |
| October | 25.7°C | 26.5°C |
| November | 19.3°C | 18.9°C |
| December | 14.6°C | 13.3°C |
Year at a glance
| Measure | Dallas | Las Vegas |
|---|---|---|
| Mean annual temperature | 19.7°C | 20.2°C |
| Warmest month (avg high) | Aug · 35°C | Jul · 39°C |
| Coldest month (avg low) | Jan · 4°C | Dec · 4°C |
| Annual range (warmest high − coldest low) | 31°C | 36°C |
| Annual precipitation | 1091.9 mm | 130.9 mm |
| Rainy days per year | 94 | 25 |
| Wettest / driest month | May / Jul | Feb / Jun |
| Average sunshine per day | 9.4 h | 11.3 h |
In short: Las Vegas is the warmest overall (20.2°C mean); Dallas gets the most precipitation (1091.9 mm a year); Las Vegas is the sunniest (11.3 h a day on average); Dallas has the smallest swing between its warmest and coldest months.
Record high 1996–2025: Dallas 42.9°C (2023-08-18), Las Vegas 47.4°C (2024-07-07). Record low: Dallas -18.9°C (2021-02-16), Las Vegas -6.9°C (2008-12-19).
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. Monthly means of daily ERA5 values, 1996–2025, for the grid cells nearest Dallas (32.79, -96.82) and Las Vegas (36.17, -115.13).
Which months differ most?
The gap in average highs is widest in July, when Las Vegas runs 9°F / 5°C warmer, and narrowest in November (1°F / 0°C apart). The biggest rainfall difference is in May: Dallas gets 5.4 in (136 mm) more on average.
Add a third or fourth city, or swap in any other place, in the full comparison tool. For one city in depth, see the Dallas climate and Las Vegas climate pages.
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Questions people ask
Is Dallas warmer than Las Vegas?
Las Vegas is warmer on average: its mean annual temperature is 68°F (20°C) against 67°F (20°C) in Dallas (ERA5, 1996–2025).
Which gets more rain, Dallas or Las Vegas?
Dallas, with about 43.0 in (1092 mm) of precipitation a year and 94 days with at least 1 mm, compared with 5.2 in (131 mm) and 25 days in Las Vegas.
Which is sunnier, Dallas or Las Vegas?
Las Vegas averages more sunshine: 11.3 h a day against 9.4 h. Sunshine duration is modelled from cloud cover.
How reliable is this comparison?
Both cities use the same 30-year reanalysis, so differences are consistent. Absolute values describe a grid cell several kilometres wide and can differ by a degree or two from the airport station.