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 snowfall in September
- Average snowfall 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
September's arrival comes with a decrease in the average high-temperature, moving from a hot 34.1°C (93.4°F) in August to a warm 28.5°C (83.3°F). Siliana experiences a steady low-temperature of 19.3°C (66.7°F) throughout September.Heat index
For most parts of September, the heat index is calculated to be a tropical 30°C (86°F). A sense of exhaustion might occur with extended exposure and activity, potentially causing heat cramps.The metrics for the heat index are tailored for both shady environments and light winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
In Siliana, Tunisia, the average relative humidity in September is 56%.Rainfall
In September, the rain falls for 10.5 days. Throughout September, 34mm (1.34") of precipitation is accumulated. In Siliana, Tunisia, during the entire year, the rain falls for 123 days and collects up to 341mm (13.43") of precipitation.Snowfall
In Siliana, snow does not fall in January, March through November.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September, sunrise is at 05:54 and sunset at 18:50. On the last day of the month, sunrise is at 06:17 and sunset at 18:07 CET.
Sunshine
The average sunshine in September is 9.8h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 6 in September translates into this advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
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?
When it does not snow?
What is the average length of the day in September in Siliana?
When are sunrise and sunset in September?
How many hours of sunshine does Siliana have in September?
What is the UV index intensity in September?
Average temperature in September
Siliana, Tunisia
- Average high temperature in September: 28.5°C
The warmest month (with the highest average high temperature) is July (34.9°C).
The month with the lowest average high temperature is January (12.6°C).
- Average low temperature in September: 19.3°C
The month with the highest average low temperature is August (22.3°C).
The coldest month (with the lowest average low temperature) is February (4.3°C).
Average pressure in September
Siliana, Tunisia
- Average pressure in September: 1016.6mbar
The month with the highest atmospheric pressure is December (1021.2mbar).
The month with the lowest atmospheric pressure is April (1014.7mbar).
Average wind speed in September
Siliana, Tunisia
- Average wind speed in September: 9.2km/h
The windiest month (with the highest average wind speed) is March (13.8km/h).
The calmest month (with the lowest average wind speed) is August (9km/h).
Average humidity in September
Siliana, Tunisia
- Average humidity in September: 56%
The month with the highest relative humidity is January (72%).
The month with the lowest relative humidity is July (38%).
Average rainfall in September
Siliana, Tunisia
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is March (52mm).
The driest month (with the least rainfall) is July (4mm).
Average rainfall days in September
Siliana, Tunisia
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is July (3.4 days).
Average snowfall in September
Siliana, Tunisia
- Average snowfall in September: 0mm
The month with the highest snowfall is February (4mm).
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Siliana, Tunisia
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Siliana, Tunisia
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days in September
Siliana, Tunisia
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is July (25.6 days).
The month with the least sunshine days is February (12.7 days).
Average UV index in September
Siliana, 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 and December (UV index 3).
Average cloud cover in September
Siliana, Tunisia
- Average cloud cover in September: 22
The month with the most cloud cover is January (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in September
Siliana, Tunisia
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, November and December (9km).
