Warm in Sep
27°C average high
avg high · 20° at night
25°C+ on 8 in 10 days
France
Nice & the Riviera weather in September
Is it warm? Yes. September in Nice & the Riviera is warm: afternoons average 26°C and nights 18°C. Most days (80%) peak between 23°C and 29°C.
Warm · average high
26°C
25°C or more on about six in ten days; 20°C or more on almost every day.
- Average low18°overnight
- Sea24°average, 2022–2025
- Rainy days446 mm in the month
- SkyOften cloudy46% cloud · 31% clear days
How warm it really gets
Every September afternoon from 2011–2025: 450 days. Most (80%) peaked between 23° and 29°.
September, year by year
The average September high in each year. The warmest, 2011, averaged 27°C; the coolest, 2017, 24°C.
Compared with home
Average September highs. Expect rain on about 4 days (46 mm in a typical month).
- Nice & the Riviera26°
- London21°
- Manchester18°
- Dublin18°
- Cork18°
- Belfast17°
- Glasgow17°
Warmer in September, not much further
Flying times are estimates from Dublin; Nice & the Riviera is about 2h 15m.
Hot in Sep
29°C average high
avg high · 20° at night
25°C+ on almost every day
Hot in Sep
28°C average high
avg high · 20° at night
25°C+ on 9 in 10 days
Air: Copernicus ERA5-Land, 2011–2025, matched to the official averages for Nice airport. Sea: Copernicus ERA5, 2022–2025. 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