WeatherArchive / Compare cities / Boston vs Las Vegas
Boston vs Las Vegas weather: climate comparison
Las Vegas is the warmer of the two, averaging 68°F (20°C) over the year against 51°F (11°C) in Boston. Boston is wetter, with 45.4 in (1154 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
- 10.6°C Boston
20.2°C Las Vegas - Annual precipitation
- 1154.0 mm Boston
130.9 mm Las Vegas - Rainy days a year
- 121 Boston
25 Las Vegas - Sunshine per day
- 8.6 h Boston
11.3 h Las Vegas
Month by month
| Month | Boston | Las Vegas |
|---|---|---|
| January | 1.9°C | 14.1°C |
| February | 3.5°C | 16.3°C |
| March | 7.5°C | 20.9°C |
| April | 13.5°C | 25.4°C |
| May | 19.1°C | 30.8°C |
| June | 24.4°C | 36.8°C |
| July | 27.9°C | 39.5°C |
| August | 26.9°C | 38.2°C |
| September | 22.9°C | 33.9°C |
| October | 16.5°C | 26.5°C |
| November | 10.2°C | 18.9°C |
| December | 5.0°C | 13.3°C |
Year at a glance
| Measure | Boston | Las Vegas |
|---|---|---|
| Mean annual temperature | 10.6°C | 20.2°C |
| Warmest month (avg high) | Jul · 28°C | Jul · 39°C |
| Coldest month (avg low) | Jan · -7°C | Dec · 4°C |
| Annual range (warmest high − coldest low) | 34°C | 36°C |
| Annual precipitation | 1154.0 mm | 130.9 mm |
| Rainy days per year | 121 | 25 |
| Wettest / driest month | Mar / Feb | Feb / Jun |
| Average sunshine per day | 8.6 h | 11.3 h |
In short: Las Vegas is the warmest overall (20.2°C mean); Boston gets the most precipitation (1154.0 mm a year); Las Vegas is the sunniest (11.3 h a day on average); Boston has the smallest swing between its warmest and coldest months.
Record high 1996–2025: Boston 40.3°C (2011-07-22), Las Vegas 47.4°C (2024-07-07). Record low: Boston -26.4°C (2016-02-14), 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 Boston (42.36, -71.13) and Las Vegas (36.17, -115.13).
Which months differ most?
The gap in average highs is widest in March, when Las Vegas runs 24°F / 13°C warmer, and narrowest in December (15°F / 8°C apart). The biggest rainfall difference is in October: Boston gets 4.1 in (103 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 Boston climate and Las Vegas climate pages.
Compare Boston or Las Vegas with another city
Questions people ask
Is Boston warmer than Las Vegas?
Las Vegas is warmer on average: its mean annual temperature is 68°F (20°C) against 51°F (11°C) in Boston (ERA5, 1996–2025).
Which gets more rain, Boston or Las Vegas?
Boston, with about 45.4 in (1154 mm) of precipitation a year and 121 days with at least 1 mm, compared with 5.2 in (131 mm) and 25 days in Las Vegas.
Which is sunnier, Boston or Las Vegas?
Las Vegas averages more sunshine: 11.3 h a day against 8.6 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.