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
At the onset of September, Santa Clara records an average high-temperature of a still warm 25.5°C (77.9°F), showing little deviation from the preceding month. Santa Clara, during September nights, records a temperature marginally cooler than the daytime average, at a still moderately hot 24.6°C (76.3°F).Humidity
August through October, with an average relative humidity of 83%, are the most humid months in Santa Clara.Rainfall
In September, the rain falls for 15.8 days. Throughout September, 35mm (1.38") of precipitation is accumulated. Throughout the year, in Santa Clara, there are 241.7 rainfall days, and 1287mm (50.67") of precipitation is accumulated.Daylight
In Santa Clara, the average length of the day in September 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, in Santa Clara, São Tomé and Príncipe, sunrise is at 05:19 and sunset at 17:26 GMT.
Sunshine
In September, the average sunshine in Santa Clara is 5.4h.UV index
In Santa Clara, São Tomé and Príncipe, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 6 during September translates into the following directions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Frequently asked questions
What are September temperatures in Santa Clara?
What are the most humid months in Santa Clara?
What is the average humidity in September in Santa Clara?
How much does it rain in Santa Clara in September?
How many hours of daylight does Santa Clara have in September?
What time are sunrise and sunset in September in Santa Clara?
How long on average sun shines in September in Santa Clara?
What is the UV index reading in September in Santa Clara?
Average temperature in September
Santa Clara, 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
Santa Clara, 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
Santa Clara, 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
Santa Clara, 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
Santa Clara, 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
Santa Clara, 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
Santa Clara, 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
Santa Clara, 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
Santa Clara, 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
Santa Clara, 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
Santa Clara, 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).
Santa Clara, São Tomé and Príncipe
Weather forecast for your location
2. Allow the app to use your location
