Explore historical and projected climate data, climate data by sector, impacts, key vulnerabilities and what adaptation measures are being taken. Explore the overview for a general context of how climate change is affecting Guyana.

Climate Data Historical

Mean temperature in Guyana is 25‐27.5°C throughout the year in most regions except the upland regions in the west, where mean temperature is 20‐23°C. Guyana experiences two ‘wet’ seasons; most of the country receives 250‐450 mm per month between May and July, and the second wet season affects mainly the northern, coastal regions which receive around 150‐300 mm per month in November to January. El Niño episodes lead to dry conditions throughout the year, and bring warmer temperatures between June and August.


  • Mean annual temperature has increased by 0.3°C since 1960, an average rate of 0.07°C per decade. This rate of warming is less rapid than the global average.
  • The average number of ‘hot’ days per year in Guyana has increased by 93 (an additional 25% of days) between 1960 and 2003. The rate of increase is seen most strongly in summer, when the average number of hot summer days has increased by 9 days per month (an additional 30% of summer days) over this period.
  • The average number of ‘hot’ nights per year increased by 87 (an additional 24% of nights) between 1960 and 2003.


  • Mean annual rainfall over Guyana has increased at an average rate of 4.8 mm per month (2.7%) per decade. Trends in seasonal rainfall are not statistically significant.
  • Where data is available, there is no evidence of any significant trends in maximum 1- or 5-day rainfalls.

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


Click on map to change chart data from country aggregated to site-specific data.