Some may find it surprising that September is the month with the highest likelihood of rainfall in Jamaica. Travelers can expect heightened instances of tropical storms and other severe weather during this season. These storms may be the cause of some of the wind and weather experienced on the island, but vacationers can rest assured that sun and sand will still remain. Temperatures are warm, but are not quite as high as those in August.
Typical Weather in September
Temperatures in Jamaica during September generally vary between an average high during the day of 88.0 degrees and an average low at night of 76.0 degrees
| Monthly Averages | | High | Low | Rainfall
(inches) | No. of Days
with Rain |
| 88.0° F |
76.0° F |
6.1 |
N.A. |
|
During the early morning hours of an average September day in Jamaica, you can expect the temperature will be in the vicinity of 79.0 degrees.
The temperature will rise over the course of the typical September day, reaching somewhere around 86.9 degrees by early afternoon.
By early evening, temperatures in Jamaica generally decline to around 80.5 degrees.
Temperatures in Jamaica average around 81.3 degrees during September.
| Early Morning | Late Morning | Early Afternoon | Late Afternoon | Early Evening | Overall |
| 79.0° F |
85.5° F |
86.9° F |
83.6° F |
80.5° F |
81.3° F |
|
Rain
Rain is most likely to occur around 4:00 PM
during the month of September, and it is least likely to occur around 7:00 AM.
To the extent thunderstorms occur in Jamaica during September, they are most likely to occur around 4:00 PM, as shown in the following table.
| Percent Frequencies of Hourly Observations | | Hour | Rain
and/or
Drizzle | Thunder-
storms |
| 1:00 AM |
1.7 % |
1.7 % |
| 4:00 AM |
1.5 % |
0.9 % |
| 7:00 AM |
1.2 % |
0.8 % |
| 10:00 AM |
1.7 % |
0 % |
| 1:00 PM |
10.9 % |
11.5 % |
| 4:00 PM |
25.5 % |
20.5 % |
| 7:00 PM |
15.5 % |
9.3 % |
| 10:00 PM |
5.2 % |
6.5 % |
| ALL |
8 % |
6.4 % |
|
