Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
A minimal variation is noted in Nova Olinda's average high-temperature at the onset of September, reaching a still moderately hot 25.5°C (77.9°F) from August's 24.8°C (76.6°F). Nova Olinda records a consistent average nighttime temperature of 24.6°C (76.3°F) in September, slightly lower than the daytime high.Humidity
The months with the highest humidity are August through October, with an average relative humidity of 83%.Rainfall
In September, in Nova Olinda, the rain falls for 15.8 days. Throughout September, 35mm (1.38") of precipitation is accumulated. Throughout the year, in Nova Olinda, São Tomé and Príncipe, there are 241.7 rainfall days, and 1287mm (50.67") of precipitation is accumulated.Daylight
The average length of the day in September in Nova Olinda is 12h and 7min.On the first day of the month, sunrise is at 05:29 and sunset at 17:36. On the last day of September, sunrise is at 05:19 and sunset at 17:26 GMT.
Sunshine
In Nova Olinda, the average sunshine in September is 5.4h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 6 in September leads to these recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Nova Olinda?
What is the most humid month in Nova Olinda?
What is the average humidity in September in Nova Olinda?
How much does it rain in Nova Olinda in September?
What is the average length of the day in September in Nova Olinda?
What time are sunrise and sunset in September in Nova Olinda?
How long on average sun shines in September in Nova Olinda?
What is the UV index reading in September in Nova Olinda?
Average temperature in September
Nova Olinda, São Tomé and Príncipe
- Average high temperature in September: 25.5°C
The warmest month (with the highest average high temperature) is March (28.8°C).
The month with the lowest average high temperature is July (24.5°C).
- Average low temperature in September: 24.6°C
The month with the highest average low temperature is March (27.5°C).
The coldest month (with the lowest average low temperature) is July (23°C).
Average pressure in September
Nova Olinda, São Tomé and Príncipe
- Average pressure in September: 1013.1mbar
The month with the highest atmospheric pressure is July (1014.3mbar).
The month with the lowest atmospheric pressure is February (1009.8mbar).
Average wind speed in September
Nova Olinda, São Tomé and Príncipe
- Average wind speed in September: 16.8km/h
The windiest month (with the highest average wind speed) is July (17.7km/h).
The calmest month (with the lowest average wind speed) is December (10.8km/h).
Average humidity in September
Nova Olinda, São Tomé and Príncipe
- Average humidity in September: 83%
The months with the highest relative humidity are August, September and October (83%).
The month with the lowest relative humidity is March (76%).
Average rainfall in September
Nova Olinda, São Tomé and Príncipe
- Average rainfall in September: 35mm
The wettest month (with the highest rainfall) is November (224mm).
The driest month (with the least rainfall) is July (9mm).
Average rainfall days in September
Nova Olinda, São Tomé and Príncipe
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is December (28.6 days).
The month with the least rainy days is June (7.3 days).
Average daylight in September /
Average sunshine in September
Nova Olinda, São Tomé and Príncipe
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 6min).
The month with the shortest days is November (Average daylight: 12h and 6min).
- Average sunshine in September: 5h and 2min
The month with the most sunshine is February (Average sunshine: 8h and 36min).
The month with the least sunshine is August (Average sunshine: 5h and 0min).
Average sunshine days in September
Nova Olinda, São Tomé and Príncipe
- Average sunshine days in September: 5.3 days
The month with the most sunshine days is June (16.4 days).
The month with the least sunshine days is December (1.5 days).
Average UV index in September
Nova Olinda, São Tomé and Príncipe
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, October, November and December (UV index 7).
The month with the lowest UV index is July (UV index 5).
Average cloud cover in September
Nova Olinda, São Tomé and Príncipe
- Average cloud cover in September: 62
The month with the most cloud cover is August (Cloud cover 65).
The month with the least cloud cover is February (Cloud cover 37).
Average visibility in September
Nova Olinda, São Tomé and Príncipe
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).
Nova Olinda, São Tomé and Príncipe
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