Jamaica weather in September
Jamaica averages 32°C by day and 25°C at night in September, with the sea at 31°C and about 163 mm of rain in the month.
Day
32°C
Night
25°C
Sea
31°C
Rain
163 mm
Flight from London
9½h
What September feels like
September is hot but wet in Jamaica: rainy season, so pack for showers.
The sea is warm at 31°C: comfortable for long swims.
It is rainy season: about 163 mm of rain falls in the month.
That is 12°C warmer than an average September day in London.
Of the 56 sun destinations we track, Jamaica is the #11 warmest in September.
Going to Jamaica in September?
Share the TikToks and Instagram Reels you've saved for Jamaica to Dream Trip. It finds the places, pins them on a map and builds your days around them.
Want it warmer in September?
These are hotter than Jamaica this month for at most an hour and a half more flying:
Jamaica weather by month
September is highlighted. Compare with August and October, or see the full year in Jamaica.
| Month | Day | Night | Sea | Rain |
|---|---|---|---|---|
| January | 28°C | 22°C | 28°C | 53 mm |
| February | 28°C | 22°C | 27°C | 50 mm |
| March | 29°C | 22°C | 28°C | 66 mm |
| April | 30°C | 23°C | 28°C | 92 mm |
| May | 31°C | 24°C | 29°C | 186 mm |
| June | 31°C | 24°C | 30°C | 135 mm |
| July | 31°C | 25°C | 30°C | 99 mm |
| August | 32°C | 25°C | 30°C | 132 mm |
| September | 32°C | 25°C | 31°C | 163 mm |
| October | 30°C | 24°C | 31°C | 224 mm |
| November | 29°C | 24°C | 30°C | 108 mm |
| December | 29°C | 23°C | 29°C | 58 mm |
Jamaica in September: quick answers
Is Jamaica hot in September?
September is hot but wet in Jamaica: rainy season, so pack for showers. Average highs are 32°C and lows 25°C.
Can you swim in Jamaica in September?
The sea is warm at 31°C: comfortable for long swims.
Does it rain in Jamaica in September?
It is rainy season: about 163 mm of rain falls in the month.
What is the warmest month in Jamaica?
August, at an average high of 32°C. The coolest is January at 28°C.
How long is the flight to Jamaica from the UK?
About 9½h direct from London, estimated from the 7,551 km distance. Check your airline for exact times.
Still choosing? See where is hot in September for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in September from 2016 to 2025 for Montego Bay, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. Rain is the average monthly total. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Jamaica in September?
Save the restaurants, beaches and views you find on TikTok and Instagram for Jamaica straight to a map, then let Dream Trip turn them into a day-by-day plan.
