Portmore Monthly Climate Data

Portmore rainfall pattern consists of two peak periods with higher values of rainfall and corresponding periods of lower rainfall amounts. The primary peak occurs in October and the secondary in May. The lowest amounts are at a minimum during the period of January and February. This is based on long term reports and deviations from this pattern do occur year to year. The hottest temperatures generally occur between the months of May and October.

The general monthly temperatures range between 17 and 32 degrees Celsius, however, a fluctuation between temperatures throughout the day must be taken into consideration.  Mornings tend to be the coolest time of day, with little or no rainfall. While late morning through late afternoon experiences a rise in temperature, with occasional showers with the peak hitting in the mid-afternoon.  Early evening into night generally brings cooler temperatures with little or no rainfall.

The following chart shows the average monthly high and low temperatures as well as the average monthly rainfall amount for the Portmore area.

Portmore average monthly temperatures & rainfall amount
Month High (ºC) Low (ºC) Rainfall (mm)
January 30 17 32
February 30 17 32
March 30 17 42
April 30 18 62
May 31 19 85
June 31 20 71
July 32 20 38
August 32 20 64
September 32 21 124
October 31 20 155
November 31 19 98
December 30 18 39