Warm in Dec
26°C average high
avg high · 21° at night
25°C+ on 8 in 10 days
South Africa
Cape Town weather in December
Is it warm? Yes. December in Cape Town is warm: afternoons average 24°C and nights 16°C. Most days (80%) peak between 20°C and 29°C.
Warm · average high
24°C
25°C or more on about four in ten days; 20°C or more on about nine in ten days.
- Average low16°overnight
- Sea14°average, 2023–2025
- Rainy days321 mm in the month
- SkySome cloud32% cloud · 54% clear days
How warm it really gets
Every December afternoon from 2011–2025: 465 days. Most (80%) peaked between 20° and 29°.
December, year by year
The average December high in each year. The warmest, 2012, averaged 27°C; the coolest, 2020, 23°C.
Compared with home
Average December highs. Expect rain on about 3 days (21 mm in a typical month).
- Cape Town24°
- Cork10°
- Dublin9°
- London9°
- Belfast8°
- Manchester8°
- Glasgow7°
Warmer in December, not much further
Flying times are estimates from Dublin; Cape Town is about 12h 45m.
Hot in Dec
31°C average high
avg high · 22° at night
25°C+ on almost every day
Warm in Dec
26°C average high
avg high · 16° at night
25°C+ on 7 in 10 days
Air: ERA5 reanalysis via Open-Meteo, 2011–2025. Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Rainy day = 2 mm or more. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology