September weather forecast
Lethem, Guyana

September represents a predominant shift in weather patterns with a drastic reduction in rainfall down to 86mm (3.39"). This downward shift officially marks the closing phase of the wet season. This shift does not dramatically change temperature, daylight, or sunshine aspects, maintaining consistency in the city’s climate. Persistent with the previous trend, UV index measurements continue to sit at a high level.

Temperature

In Lethem, January through April, September through December are characterised by the peak of temperatures, recording an average high of 33°C (91.4°F).

Rainfall

In Lethem, in September, during 13 rainfall days, 86mm (3.39") of precipitation is typically accumulated. In Lethem, Guyana, during the entire year, the rain falls for 194 days and collects up to 1739mm (68.46") of precipitation.

Daylight

The average length of the day in September in Lethem is 12h and 8min.
On the first day of September in Lethem, sunrise is at 05:53 and sunset at 18:04. On the last day of the month, sunrise is at 05:46 and sunset at 17:51 -04.

Sunshine

August through November, with an average of 8h of sunshine, are months with the most sunshine in Lethem.

UV index

The months with the highest UV index in Lethem, Guyana, are January through December, with an average maximum UV index of 12. The months with the lowest UV index are January through December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an extreme health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In September, a regular UV index of 12 translates into these guidelines:
Take all required precautions, as unprotected skin and eyes can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Broad-spectrum SPF 30+ sunscreen must be generously applied and reapplied every two hours or post any outdoor activity or swim.