Weather in Montego Bay in August

How August compares

August is the 2nd warmest month of the year in Montego Bay and ranks 23rd of 134 destinations we compare for August - see where else is hot in August. Against London's average high of 21.4°C in August, Montego Bay is 9.9°C warmer by day and 12.1°C warmer at night.

Daytime and night-time in August

The typical August day in Montego Bay peaks at 31.3°C, but that is an average: the warmest 10% of days reach 32.2°C or more. About 100% of days top 25°C and almost every pass 30°C. Nights average 25.6°C; one night in ten drops to 24.8°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 33.9°C (2016-08-08) and the coldest night 22.8°C (2018-08-04).

Rain in August

Wet (more than 8 rainy days): about 25 days with 1 mm or more, 166 mm in total. Year to year it varies a lot - the wettest August was 1995 with 267 mm, the driest 2018 with 85 mm. Humidity averages 83%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in August

The sea averages 29.3°C - warm enough to swim (22°c+). Depending on the year it ranges from 29.0°C to 29.7°C. For the warmest sea here, come in September (29.6°C).

Sunshine and daylight

Around 5.1 hours of sunshine a day (estimated from cloud cover), 12.6 hours of daylight: the sun rises about 05:53 and sets about 18:39 local time in mid-August. Average cloud cover is 59%.

Is August a good time to visit Montego Bay?

It is a reasonable choice: hot days but expect showers. The best months for Montego Bay on our scoring are February, January, March; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Hot days, warm nights and little relief from the sea

August is among Montego Bay's hottest months, with temperatures reaching 30°C on 96% of days. Humidity averages 83%, so the heat can feel tiring rather than simply pleasant, particularly when you are active around midday. Plan anything energetic for earlier in the day and leave room for shade and rests. Loose, lightweight clothing makes sense, and air conditioning is a useful accommodation priority because nights remain warm. The sea averages 29.3°C, making swimming an easy choice if you dislike a chilly dip, though it offers limited cooling. This weather suits travellers comfortable with persistent warmth better than those who need a cool evening to recover.

Allow for rain rather than planning around guaranteed sun

Rain is a regular part of August, not a remote possibility to ignore when packing. Bring a light waterproof and keep outdoor plans movable rather than committing every day to weather-dependent activities. About 5.1 hours of sunshine within 12.6 hours of daylight means there is sunshine to enjoy, but daylight should not be mistaken for clear skies. The figures do not tell you when rain will arrive or how long each spell will last, so do not assume it will conveniently fall overnight. August is a reasonable choice if you can take wet spells in your stride; it is less suitable if a dry-weather holiday is your main priority.