Cool in Dec
19°C average high
avg high · 8° at night
25°C+ on rarely
Nevada, USA
Las Vegas weather in December
Is it warm? No. December in Las Vegas is cold: afternoons average 15°C and nights 5°C. Most days (80%) peak between 10°C and 20°C.
Cold · average high
15°C
25°C or more on almost no days; 20°C or more on about one in ten days.
- Average low5°overnight
- Sea—inland
- Rainy days212 mm in the month
- SkySome cloud40% cloud · 45% clear days
How warm it really gets
Every December afternoon from 2011–2025: 465 days. Most (80%) peaked between 10° and 20°.
December, year by year
The average December high in each year. The warmest, 2024, averaged 18°C; the coolest, 2019, 12°C.
Compared with home
Average December highs. Expect rain on about 2 days (12 mm in a typical month).
- Las Vegas15°
- Cork10°
- London10°
- Dublin9°
- Belfast9°
- Manchester9°
- Glasgow8°
Warmer in December, not much further
Flying times are estimates from Dublin; Las Vegas is about 10h 15m.
Cool in Dec
18°C average high
avg high · 9° at night
25°C+ on rarely
Cool in Dec
18°C average high
avg high · 11° at night
25°C+ on rarely
Air: Copernicus ERA5-Land, 2011–2025, matched to the official averages for Las Vegas airport. Rainy days = days with 1 mm of rain or more, as weather stations count them. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology