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
September
Weather in September
Temperature
The unfolding of September shows an average high-temperature of a still warm 28.4°C (83.1°F), indicating a slight variance from August's 27.9°C (82.2°F). Throughout the September nights, San Sebastian encounters a low-temperature of 18.3°C (64.9°F).Heat index
In September, the average heat index is calculated to be a hot 34°C (93.2°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.Be aware that heat index ratings are designed for shaded locations and minor breezes. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Humidity
In September, the average relative humidity is 85%.Rainfall
In San Sebastian, in September, during 27.8 rainfall days, 146mm (5.75") of precipitation is typically accumulated. Throughout the year, there are 251.2 rainfall days, and 1244mm (48.98") of precipitation is accumulated.Daylight
In September, the average length of the day in San Sebastian is 12h and 11min.On the first day of September, sunrise is at 06:19 and sunset at 18:37. On the last day of the month, sunrise is at 06:17 and sunset at 18:19 -04.
Sunshine
In San Sebastian, the average sunshine in September is 7.9h.UV index
January, May through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How many days does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
When is the lowest UV index?
What is the UV index intensity in September?
Average temperature in September
San Sebastian, Venezuela
- Average high temperature in September: 28.4°C
The warmest month (with the highest average high temperature) is March (32.3°C).
The month with the lowest average high temperature is July (27.8°C).
- Average low temperature in September: 18.3°C
The month with the highest average low temperature is April (21.1°C).
The coldest month (with the lowest average low temperature) is September (18.3°C).
Average pressure in September
San Sebastian, Venezuela
- Average pressure in September: 1011.7mbar
The month with the highest atmospheric pressure is July (1013.4mbar).
The month with the lowest atmospheric pressure is November (1010.2mbar).
Average wind speed in September
San Sebastian, Venezuela
- Average wind speed in September: 4.5km/h
The windiest month (with the highest average wind speed) is February (7km/h).
The calmest month (with the lowest average wind speed) is September (4.5km/h).
Average humidity in September
San Sebastian, Venezuela
- Average humidity in September: 85%
The month with the highest relative humidity is August (86%).
The month with the lowest relative humidity is March (62%).
Average rainfall in September
San Sebastian, Venezuela
- Average rainfall in September: 146mm
The wettest month (with the highest rainfall) is August (180mm).
The driest month (with the least rainfall) is February (14mm).
Average rainfall days in September
San Sebastian, Venezuela
- Average rainfall days in September: 27.8 days
The month with the highest number of rainy days is October (28.5 days).
The month with the least rainy days is February (6.5 days).
Average daylight in September /
Average sunshine in September
San Sebastian, Venezuela
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is February (Average sunshine: 9h and 48min).
The month with the least sunshine is July (Average sunshine: 7h and 6min).
Average sunshine days in September
San Sebastian, Venezuela
- Average sunshine days in September: 1.8 days
The month with the most sunshine days is February (17.9 days).
The month with the least sunshine days is August (1.5 days).
Average UV index in September
San Sebastian, Venezuela
- Average UV index in September: 6
The months with the highest UV index are February, March and April (UV index 7).
The months with the lowest UV index are January, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in September
San Sebastian, Venezuela
- Average cloud cover in September: 47
The month with the most cloud cover is July (Cloud cover 53).
The month with the least cloud cover is February (Cloud cover 19).
Average visibility in September
San Sebastian, Venezuela
- Average visibility in September: 7km
The months with the highest visibility are January, February and March (10km).
The months with the lowest visibility are July, August, September, October and November (7km).
