September weather forecastGeorgetown, Guyana

September
Weather in September
Georgetown in September ushers in a period of reprieve from heavy rainfalls seen in the past few months. The city, now accustomed to the monsoon climate, expects a decrease in rainfall. Drawing a comparison from August to October, September shows a substantial reduction in rainfall, plummeting to an average of 98mm (3.86"). With a fine balance of temperatures, moderated rainfall, and warm sea waters, the city remains vibrant and dynamic. Georgetown lives up to its tropical reputation as September marks the advent of a welcoming climate.Temperature
Georgetown witnesses its highest average temperatures during September and October, peaking at 30.8°C (87.4°F).Rainfall
In September, the rain falls for 9 days. Throughout September, 98mm (3.86") of precipitation is accumulated. Throughout the year, there are 174 rainfall days, and 2260mm (88.98") of precipitation is accumulated.Sea temperature
In Georgetown, Guyana, in September, the average water temperature is 28.8°C (83.8°F).Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.
Daylight
In September, the average length of the day is 12h and 10min.On the first day of the month, sunrise is at 05:45 and sunset at 17:59. On the last day of September, sunrise is at 05:40 and sunset at 17:44 -04.
Sunshine
The month with the most sunshine is September, with an average of 7.7h of sunshine.UV index
January through October, with an average maximum UV index of 12, are months with the highest UV index. A UV Index reading of 11, and higher, represents an excessive health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: An average UV index of 12 in September transforms into this advice:
Implement every essential safety step. Individuals with fair skin might receive burns in less than 5 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Even when the sky is cloudy, apply generously and frequently reapply a sunscreen with SPF 30 or more, especially post every swim or outdoor exercise. Attention! UV radiation is markedly stronger with water and sand reflections.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Georgetown, Guyana
- Average high temperature in September: 30.8°C
The warmest months (with the highest average high temperature) are September and October (30.8°C).
The month with the lowest average high temperature is January (28.6°C).
- Average low temperature in September: 24.2°C
The months with the highest average low temperature are April and October (24.4°C).
The coldest month (with the lowest average low temperature) is July (23.5°C).
Average rainfall in September
Georgetown, Guyana
- Average rainfall in September: 97.5mm
The wettest month (with the highest rainfall) is June (327.7mm).
The driest month (with the least rainfall) is February (88.5mm).
Average rainfall days in September
Georgetown, Guyana
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is June (23 days).
The months with the least rainy days are September and October (9 days).
Average sea temperature in September
Georgetown, Guyana
- Average sea temperature in September: 28.8°C
The best month for swimming (with the highest average sea temperature) is August (28.9°C).
The coldest month (with the lowest average sea temperature) is February (27.2°C).
Average daylight in September /
Average sunshine in September
Georgetown, Guyana
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is September (Average sunshine: 7h and 42min).
The month with the least sunshine is June (Average sunshine: 5h and 12min).
Average UV index in September
Georgetown, Guyana
- Average UV index in September: 12
The months with the highest UV index are January, February, March, April, May, June, July, August, September and October (UV index 12).
The months with the lowest UV index are November and December (UV index 11).





