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Las Vegas vs Phoenix weather: climate comparison
Phoenix is the warmer of the two, averaging 73°F (23°C) over the year against 68°F (20°C) in Las Vegas. Phoenix is wetter, with 9.6 in (243 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
- 20.2°C Las Vegas
23.0°C Phoenix - Annual precipitation
- 130.9 mm Las Vegas
243.4 mm Phoenix - Rainy days a year
- 25 Las Vegas
30 Phoenix - Sunshine per day
- 11.3 h Las Vegas
11.1 h Phoenix
Month by month
| Month | Las Vegas | Phoenix |
|---|---|---|
| January | 14.1°C | 18.9°C |
| February | 16.3°C | 20.8°C |
| March | 20.9°C | 25.0°C |
| April | 25.4°C | 29.5°C |
| May | 30.8°C | 34.6°C |
| June | 36.8°C | 40.1°C |
| July | 39.5°C | 40.9°C |
| August | 38.2°C | 40.0°C |
| September | 33.9°C | 37.2°C |
| October | 26.5°C | 31.1°C |
| November | 18.9°C | 24.3°C |
| December | 13.3°C | 18.4°C |
Year at a glance
| Measure | Las Vegas | Phoenix |
|---|---|---|
| Mean annual temperature | 20.2°C | 23.0°C |
| Warmest month (avg high) | Jul · 39°C | Jul · 41°C |
| Coldest month (avg low) | Dec · 4°C | Jan · 5°C |
| Annual range (warmest high − coldest low) | 36°C | 36°C |
| Annual precipitation | 130.9 mm | 243.4 mm |
| Rainy days per year | 25 | 30 |
| Wettest / driest month | Feb / Jun | Feb / Jun |
| Average sunshine per day | 11.3 h | 11.1 h |
In short: Phoenix is the warmest overall (23.0°C mean); Phoenix gets the most precipitation (243.4 mm a year); Las Vegas is the sunniest (11.3 h a day on average); Las Vegas has the smallest swing between its warmest and coldest months.
Record high 1996–2025: Las Vegas 47.4°C (2024-07-07), Phoenix 47.7°C (2016-06-19). Record low: Las Vegas -6.9°C (2008-12-19), Phoenix -3.5°C (2007-01-14).
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 Las Vegas (36.17, -115.13) and Phoenix (33.43, -112.03).
Which months differ most?
The gap in average highs is widest in November, when Phoenix runs 10°F / 5°C warmer, and narrowest in July (3°F / 1°C apart). The biggest rainfall difference is in July: Phoenix gets 0.9 in (22 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 Las Vegas climate and Phoenix climate pages.
Compare Las Vegas or Phoenix with another city
Questions people ask
Is Las Vegas warmer than Phoenix?
Phoenix is warmer on average: its mean annual temperature is 73°F (23°C) against 68°F (20°C) in Las Vegas (ERA5, 1996–2025).
Which gets more rain, Las Vegas or Phoenix?
Phoenix, with about 9.6 in (243 mm) of precipitation a year and 30 days with at least 1 mm, compared with 5.2 in (131 mm) and 25 days in Las Vegas.
Which is sunnier, Las Vegas or Phoenix?
Las Vegas averages more sunshine: 11.3 h a day against 11.1 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.