Climate averages 1991–2020
Montego Bay weather
in September.
A hot, very wet month: the 4th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Montego Bay: daytime highs average 31.7°C and nights cool to about 25.1°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 205 mm of rain on roughly 26 days, which makes September a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 15 min on an average September day.
The nearest other city in this atlas is Spanish Town (115 km away). In September its highs average 30.6°C, 1.2°C cooler than Montego Bay, with 139 mm of rain.
Among the 4 cities listed in Jamaica, Montego Bay ranks 1st of 4 for the warmest September highs and 4th of 4 for the driest September (rainfall, lowest first). The mean September high of those 4 cities is 31.0°C; Montego Bay is 0.7°C warmer than that mean.
From September to October, average highs fall by 1.0°C to 30.7°C, and monthly rainfall falls from 205 mm to 182 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Montego Bay climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.9°C22.1°C | 22.1°C | 44 | 11.4 | 11.211 h |
| February | 29.5°C21.9°C | 21.9°C | 41 | 11.5 | 11.512 h |
| March | 30.3°C22.2°C | 22.2°C | 58 | 12.7 | 12.012 h |
| April | 31.2°C23.1°C | 23.1°C | 93 | 16.3 | 12.613 h |
| May | 31.4°C24.1°C | 24.1°C | 220 | 23.8 | 13.013 h |
| June | 32.2°C25.0°C | 25.0°C | 148 | 21.8 | 13.213 h |
| July | 32.4°C25.1°C | 25.1°C | 138 | 23.3 | 13.113 h |
| August | 32.3°C25.3°C | 25.3°C | 171 | 26.1 | 12.813 h |
| September, selected | 31.7°C25.1°C | 25.1°C | 205 | 25.9 | 12.312 h |
| October | 30.7°C24.7°C | 24.7°C | 182 | 24.7 | 11.712 h |
| November | 29.5°C23.8°C | 23.8°C | 91 | 16.4 | 11.311 h |
| December | 29.0°C22.9°C | 22.9°C | 50 | 11.4 | 11.011 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Spanish Town in SeptemberJamaica · 115 kmHigh 30.6°C · Low 24.8°C · 139 mm rain
- Portmore in SeptemberJamaica · 122 kmHigh 30.7°C · Low 25.0°C · 139 mm rain
- Kingston in SeptemberJamaica · 130 kmHigh 31.2°C · Low 24.2°C · 124 mm rain
- Manzanillo, Cuba in SeptemberCuba · 224 kmHigh 32.3°C · Low 24.4°C · 157 mm rain
- Bayamo in SeptemberCuba · 250 kmHigh 32.5°C · Low 23.3°C · 170 mm rain
- Contramaestre in SeptemberCuba · 269 kmHigh 32.1°C · Low 23.7°C · 122 mm rain
- Palma Soriano in SeptemberCuba · 280 kmHigh 31.3°C · Low 23.5°C · 135 mm rain
- Santiago de Cuba in SeptemberCuba · 280 kmHigh 31.2°C · Low 24.7°C · 115 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Montego Bay) is explained once on the Montego Bay year overview and on the Sources, method and limits page.