Las Vegas weather by month
Las Vegas runs from about 9°C in January to 37°C in July, with February the wettest month at 45 mm.
warmest month
July
37°C
coolest month
January
9°C
wettest month
February
45 mm
worst air month
January
13 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 9°C | 21 mm | 246 h | 13 |
| February | 10°C | 45 mm | 238 h | 11 |
| March | 14°C | 22 mm | 316 h | 7 |
| April | 20°C | 2 mm | 375 h | 5 |
| May | 26°C | 0 mm | 407 h | 6 |
| June | 34°C | 0 mm | 414 h | 6 |
| July | 37°C | 0 mm | 423 h | 6 |
| August | 34°C | 0 mm | 393 h | 7 |
| September | 30°C | 0 mm | 353 h | 5 |
| October | 25°C | 1 mm | 328 h | 6 |
| November | 12°C | 1 mm | 272 h | 10 |
| December | 10°C | 0 mm | 268 h | 13 |
About 4,033 hours of sun a year. Roughly 9 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.