September weather forecastPrincetown, Guyana
September
Weather in September
The first month of the autumn, September, is still a tropical month in Princetown, Guyana, with an average temperature ranging between min 25.9°C (78.6°F) and max 30.8°C (87.4°F).Temperature
September, with average temperatures reaching a high of 30.8°C (87.4°F) and a low of 25.9°C (78.6°F), is the warmest month.Heat index
The heat index in September is estimated at a sweltering 39°C (102.2°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular importance for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
The least humid month is September, with an average relative humidity of 76%.Rainfall
In Princetown, in September, it is raining for 24.5 days, with typically 141mm (5.55") of accumulated precipitation. In Princetown, during the entire year, the rain falls for 312.6 days and collects up to 2298mm (90.47") of precipitation.Daylight
In September, the average length of the day in Princetown is 12h and 9min.On the first day of the month, sunrise is at 05:41 and sunset at 17:55. On the last day of September, in Princetown, Guyana, sunrise is at 05:36 and sunset at 17:40 -04.
Sunshine
The month with the most sunshine is September, with an average of 9.3h of sunshine.UV index
January, February, April, June through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Princetown, Guyana
- Average high temperature in September: 30.8°C
The warmest month (with the highest average high temperature) is September (30.8°C).
The months with the lowest average high temperature are January and February (28°C).
- Average low temperature in September: 25.9°C
The months with the highest average low temperature are September and October (25.9°C).
The coldest months (with the lowest average low temperature) are January, February and July (24.8°C).
Average pressure in September
Princetown, Guyana
- Average pressure in September: 1011.4mbar
The month with the highest atmospheric pressure is June (1012.9mbar).
The month with the lowest atmospheric pressure is November (1009.4mbar).
Average wind speed in September
Princetown, Guyana
- Average wind speed in September: 13.6km/h
The windiest month (with the highest average wind speed) is March (16.7km/h).
The calmest month (with the lowest average wind speed) is July (11.3km/h).
Average humidity in September
Princetown, Guyana
- Average humidity in September: 76%
The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is September (76%).
Average rainfall in September
Princetown, Guyana
- Average rainfall in September: 141mm
The wettest month (with the highest rainfall) is June (314mm).
The driest month (with the least rainfall) is March (97mm).
Average rainfall days in September
Princetown, Guyana
- Average rainfall days in September: 24.5 days
The month with the highest number of rainy days is July (29.9 days).
The month with the least rainy days is October (23.5 days).
Average daylight in September /
Average sunshine in September
Princetown, 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 48min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is September (Average sunshine: 9h and 18min).
The month with the least sunshine is April (Average sunshine: 7h and 0min).
Average sunshine days in September
Princetown, Guyana
- Average sunshine days in September: 3.4 days
The month with the most sunshine days is October (5 days).
The month with the least sunshine days is July (0.3 days).
Average UV index in September
Princetown, Guyana
- Average UV index in September: 7
The months with the highest UV index are January, February, April, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are March and May (UV index 6).
Average cloud cover in September
Princetown, Guyana
- Average cloud cover in September: 24
The months with the most cloud cover are February and April (Cloud cover 49).
The month with the least cloud cover is September (Cloud cover 24).
Average visibility in September
Princetown, Guyana
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, September, October and December (10km).
The months with the lowest visibility are May, June, July, August and November (9km).
