August in St. Lucia has the potential to see the highest temperatures of the year and also has the greatest chance to see severe tropical weather. Vacationers should be aware that in the more mountainous parts of the island, the rainfall amounts will be greater and temperatures will be slightly cooler providing for potentially chilly weather.
Typical Weather in August
Temperatures in St. Lucia during August generally vary between an average high during the day of 86.0 degrees and an average low at night of 80.0 degrees
| Monthly Averages | | High | Low | Rainfall
(inches) | No. of Days
with Rain |
| 86.0° F |
80.0° F |
N.A. |
20.0 |
|
Temperature
On any given day during August in St. Lucia, you can expect early morning temperatures to be around 81.5 degrees.
Temperatures in St. Lucia typically rise during the day, to an average of 85.4 degrees in the early afternoon.
By early evening, temperatures in St. Lucia generally decline to around 80.3 degrees.
Temperatures in St. Lucia average around 83.1 degrees during August.
| Early Morning | Late Morning | Early Afternoon | Late Afternoon | Early Evening | Overall |
| 81.5° F |
84.9° F |
85.4° F |
83.0° F |
80.3° F |
83.1° F |
|
Rain
Rain is least likely to occur in St. Lucia during August around 11:00 AM, and it is most likely to occur around 8:00 AM.
As shown below, if a thunderstorm occurs in August, it is most likely to occur around 5:00 PM.
| Percent Frequencies of Hourly Observations | | Hour | Rain
and/or
Drizzle | Thunder-
storms |
| 2:00 AM |
# |
# |
| 5:00 AM |
# |
# |
| 8:00 AM |
29.8 % |
0.5 % |
| 11:00 AM |
19.6 % |
1.1 % |
| 2:00 PM |
23 % |
0.5 % |
| 5:00 PM |
20.9 % |
2 % |
| 8:00 PM |
20 % |
1.8 % |
| 11:00 PM |
# |
# |
| ALL |
22.9 % |
1.1 % |
|
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