Current Climate

Climatology

This page presents Guyana's climate context for the current climatology, 1991-2020, derived from observed, historical data. Information should be used to build a strong understanding of current climate conditions in order to appreciate future climate scenarios and projected change. You can visualize data for the current climatology through spatial variation, the seasonal cycle, or as a time series. Analysis is available for both annual and seasonal data. Data presentation defaults to national-scale aggregation, however sub-national data aggregations can be accessed by clicking within a country, on a sub-national unit.  Other historical climatologies can be selected from the Time Period dropdown list. Data for  specific coordinates can be downloaded for in the Data Download page.

Observed, historical data is produced by the Climatic Research Unit (CRU) of University of East Anglia. Data is presented at a 0.5º x 0.5º (50km x 50km) resolution.

Guyana enjoys a wet tropical climate with warm temperatures and abundant rainfall without the extremes of hot or cold. Temperature ranges between 16°C and 34°C with lower temperatures in the higher regions. Air temperatures range between 16°C and 34°C with lower temperatures in the higher regions. Temperatures on the coast range between 22°C and 31°C due to the stabilizing effect of the sea and the North Eastern Trade Winds. These Trade Winds flow over the coast with speeds averaging ten miles per hour, and decrease as they move further inland where light winds generally prevail. 

Temperature

  • The mean annual air temperature of Guyana, overall, has increased by 0.3°C since 1960, which translates into an average rate of ~0.07°C per decade; a rate of warming less rapid than the global average of ~ 0.08°C per decade recently, with the highest changes occurring in the August-September dry season (~ 0.10°C per decade). 
  • Furthermore, average diurnal temperature variations are generally lower on the coast where the marine influence is most pronounced, and maximum temperatures average 29.6°C, while daily temperatures average 24°C. 
  • However, the lowest average daily temperatures occur in the higher interior mountainous regions, where daily maximum temperatures average 28.6°C and daily minimum 19.6°C.

Precipitation

  • Average annual rainfall range between 1,600 mm to 3,000 mm with spatial variability in rainfall. 
  • There are two rainy seasons: mid-April to the end of July and mid-November to January. The periods in between are often referred to as primary dry (long) season and secondary (short) dry season, respectively.

This section provides the options to visualize historical climate data for different timeframes via map and annual cycle chart.