Very hot in Aug
37°C average high
avg high · 22° at night
25°C+ on almost every day · often 35°C+
Caribbean
Jamaica (Montego Bay) weather in August
Is it warm? Yes. August in Jamaica (Montego Bay) is hot: afternoons average 32°C and nights 25°C. Most days (80%) peak between 31°C and 33°C.
Hot · average high
32°C
25°C or more on almost every day.
- Average low25°overnight
- Sea30°average, 2023–2025
- Rainy days18143 mm in the month
- SkyOften cloudy59% cloud · 15% clear days
How warm it really gets
Every August afternoon from 2011–2025: 465 days. Most (80%) peaked between 31° and 33°.
August, year by year
The average August high in each year. The warmest, 2025, averaged 32°C; the coolest, 2022, 31°C.
Compared with home
Average August highs. Expect rain on about 18 days (143 mm in a typical month).
- Jamaica (Montego Bay)32°
- London22°
- Manchester19°
- Dublin19°
- Cork19°
- Belfast18°
- Glasgow18°
Warmer in August, not much further
Flying times are estimates from Dublin; Jamaica (Montego Bay) is about 9h 15m.
Very hot in Aug
38°C average high
avg high · 21° at night
25°C+ on almost every day · often 35°C+
Hot in Aug
33°C average high
avg high · 24° at night
25°C+ on almost every day
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