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 sea temperature 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 arrival of September corresponds with a minor reduction in the average high-temperature, down from August's hot 32.4°C (90.3°F) to a warm 28.6°C (83.5°F). Gammarth records a steady low-temperature average of 22.4°C (72.3°F) during September.Heat index
In September, the average heat index is computed to be a tropical 31°C (87.8°F). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.Heat index data is primarily for areas with shade and subjected to light winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Humidity
In Gammarth, the average relative humidity in September is 63%.Rainfall
In Gammarth, in September, it is raining for 10.4 days, with typically 27mm (1.06") of accumulated precipitation. In Gammarth, during the entire year, the rain falls for 120 days and collects up to 297mm (11.69") of precipitation.Sea temperature
In Gammarth, the average seawater temperature in September is 25°C (77°F).Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are considered superb and highly pleasant for water activities over extended periods.
Daylight
In Gammarth, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 05:50 and sunset at 18:47. On the last day of the month, sunrise is at 06:13 and sunset at 18:03 CET.
Sunshine
In September, the average sunshine is 10.5h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 6 suggests this advice:
Take precautions against overexposure. Protection against sun damage is needed. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Caution! The Sun's UV intensity grows with reflections off sand and water.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How much does it rain in September?
How warm is the water in September?
How many hours of daylight does Gammarth have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Gammarth, Tunisia
- Average high temperature in September: 28.6°C
The warmest month (with the highest average high temperature) is August (32.4°C).
The month with the lowest average high temperature is January (14.8°C).
- Average low temperature in September: 22.4°C
The month with the highest average low temperature is August (24.6°C).
The coldest month (with the lowest average low temperature) is February (8.7°C).
Average pressure in September
Gammarth, Tunisia
- Average pressure in September: 1016.2mbar
The month with the highest atmospheric pressure is December (1020.4mbar).
The month with the lowest atmospheric pressure is April (1014.7mbar).
Average wind speed in September
Gammarth, Tunisia
- Average wind speed in September: 13.5km/h
The windiest month (with the highest average wind speed) is February (18.8km/h).
The calmest month (with the lowest average wind speed) is August (12.7km/h).
Average humidity in September
Gammarth, Tunisia
- Average humidity in September: 63%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (53%).
Average rainfall in September
Gammarth, Tunisia
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is October (38mm).
The driest month (with the least rainfall) is July (5mm).
Average rainfall days in September
Gammarth, Tunisia
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is January (14.2 days).
The month with the least rainy days is July (2.6 days).
Average sea temperature in September
Gammarth, Tunisia
- Average sea temperature in September: 25°C
The best month for swimming (with the highest average sea temperature) is August (26°C).
The coldest months (with the lowest average sea temperature) are January, February, March and April (15°C).
Average daylight in September /
Average sunshine in September
Gammarth, Tunisia
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 10h and 3min
The month with the most sunshine is August (Average sunshine: 12h and 18min).
The month with the least sunshine is January (Average sunshine: 6h and 0min).
Average sunshine days in September
Gammarth, Tunisia
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is February (12 days).
Average UV index in September
Gammarth, Tunisia
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in September
Gammarth, Tunisia
- Average cloud cover in September: 17
The month with the most cloud cover is January (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in September
Gammarth, Tunisia
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
