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Houston vs Las Vegas weather: climate comparison
Houston is the warmer of the two, averaging 70°F (21°C) over the year against 68°F (20°C) in Las Vegas. Houston is wetter, with 54.0 in (1372 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
- 21.3°C Houston
20.2°C Las Vegas - Annual precipitation
- 1372.4 mm Houston
130.9 mm Las Vegas - Rainy days a year
- 132 Houston
25 Las Vegas - Sunshine per day
- 9.3 h Houston
11.3 h Las Vegas
Month by month
| Month | Houston | Las Vegas |
|---|---|---|
| January | 16.9°C | 14.1°C |
| February | 18.8°C | 16.3°C |
| March | 22.2°C | 20.9°C |
| April | 25.7°C | 25.4°C |
| May | 29.4°C | 30.8°C |
| June | 32.0°C | 36.8°C |
| July | 32.9°C | 39.5°C |
| August | 33.5°C | 38.2°C |
| September | 31.0°C | 33.9°C |
| October | 27.1°C | 26.5°C |
| November | 21.8°C | 18.9°C |
| December | 18.1°C | 13.3°C |
Year at a glance
| Measure | Houston | Las Vegas |
|---|---|---|
| Mean annual temperature | 21.3°C | 20.2°C |
| Warmest month (avg high) | Aug · 33°C | Jul · 39°C |
| Coldest month (avg low) | Jan · 8°C | Dec · 4°C |
| Annual range (warmest high − coldest low) | 26°C | 36°C |
| Annual precipitation | 1372.4 mm | 130.9 mm |
| Rainy days per year | 132 | 25 |
| Wettest / driest month | Sep / Feb | Feb / Jun |
| Average sunshine per day | 9.3 h | 11.3 h |
In short: Houston is the warmest overall (21.3°C mean); Houston gets the most precipitation (1372.4 mm a year); Las Vegas is the sunniest (11.3 h a day on average); Houston has the smallest swing between its warmest and coldest months.
Record high 1996–2025: Houston 41.7°C (2000-09-04), Las Vegas 47.4°C (2024-07-07). Record low: Houston -10.9°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 Houston (29.77, -95.33) and Las Vegas (36.17, -115.13).
Which months differ most?
The gap in average highs is widest in July, when Las Vegas runs 12°F / 7°C warmer, and narrowest in April (0°F / 0°C apart). The biggest rainfall difference is in September: Houston gets 5.1 in (128 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 Houston climate and Las Vegas climate pages.
Compare Houston or Las Vegas with another city
Questions people ask
Is Houston warmer than Las Vegas?
Houston is warmer on average: its mean annual temperature is 70°F (21°C) against 68°F (20°C) in Las Vegas (ERA5, 1996–2025).
Which gets more rain, Houston or Las Vegas?
Houston, with about 54.0 in (1372 mm) of precipitation a year and 132 days with at least 1 mm, compared with 5.2 in (131 mm) and 25 days in Las Vegas.
Which is sunnier, Houston or Las Vegas?
Las Vegas averages more sunshine: 11.3 h a day against 9.3 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.