Weather on St. Lucia in August

August on 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

August temperatures on St. Lucia range from an average low of 80.0 degrees to an average high of 86.0 degrees


St. Lucia in August: Key Facts
Monthly Averages
High Low Rainfall
No. of Days
with Rain
86.0° F 80.0° F N.A. 20.0

On a typical August day, during the early morning hours you will probably find the temperature will be around 81.5 degrees. In August, temperatures typically rise to around 85.4 degrees by early afternoon. The temperature on St. Lucia will typically decline by early evening, to approximately 80.3 degrees. Temperatures on St. Lucia average around 83.1 degrees during August.


August Temperatures on St. Lucia by Time of Day
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



During August, rain is most likely to occur around 8:00 AM , and least likely to occur around 11:00 AM . In St. Lucia during August, thunderstorms -- when they occur -- are most likely sometime around 5:00 PM .


August Rainfall on St. Lucia by Time of Day
  Percent Frequencies of Hourly Observations
Hour Rain
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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