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 advent of September brings an average high-temperature of a still tropical 32.5°C (90.5°F), exhibiting minor difference from the previous month. During September, Biem experiences an average low-temperature of 22.4°C (72.3°F) at night.Heat index
In September, the heat index is calculated to be a blisteringly hot 43°C (109.4°F). Note: Heat exhaustion and heat cramps are probable. Heatstroke can follow with prolonged activity.Understand that the heat index values take into account shaded locations and mild winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.
Humidity
In September, the average relative humidity is 73%.Rainfall
In Biem, South Sudan, during September, the rain falls for 21.2 days and regularly aggregates up to 87mm (3.43") of precipitation. Throughout the year, there are 128.7 rainfall days, and 541mm (21.3") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 11min.On the first day of the month, sunrise is at 05:50 and sunset at 18:08. On the last day of September, sunrise is at 05:47 and sunset at 17:50 CAT.
Sunshine
In Biem, the average sunshine in September is 9h.UV index
The average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 7 in September transforms into the following instructions:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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 many hours of sunshine does Biem have in September?
What is the UV index intensity in September?
Average temperature in September
Biem, South Sudan
- Average high temperature in September: 32.5°C
The warmest month (with the highest average high temperature) is March (41.4°C).
The month with the lowest average high temperature is August (31.1°C).
- Average low temperature in September: 22.4°C
The month with the highest average low temperature is April (28.2°C).
The coldest months (with the lowest average low temperature) are January and August (22.3°C).
Average pressure in September
Biem, South Sudan
- Average pressure in September: 1010.2mbar
The month with the highest atmospheric pressure is July (1011.2mbar).
The month with the lowest atmospheric pressure is April (1006.4mbar).
Average wind speed in September
Biem, South Sudan
- Average wind speed in September: 5.7km/h
The windiest month (with the highest average wind speed) is February (9km/h).
The calmest months (with the lowest average wind speed) are September and October (5.7km/h).
Average humidity in September
Biem, South Sudan
- Average humidity in September: 73%
The month with the highest relative humidity is August (77%).
The month with the lowest relative humidity is February (15%).
Average rainfall in September
Biem, South Sudan
- Average rainfall in September: 87mm
The wettest month (with the highest rainfall) is August (138mm).
The driest months (with the least rainfall) are January, February and December (0mm).
Average rainfall days in September
Biem, South Sudan
- Average rainfall days in September: 21.2 days
The month with the highest number of rainy days is August (24.4 days).
The month with the least rainy days is January (0.2 days).
Average daylight in September /
Average sunshine in September
Biem, South Sudan
- 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: 9h and 0min
The months with the most sunshine are January, February, November and December (Average sunshine: 10h and 0min).
The months with the least sunshine are July and August (Average sunshine: 8h and 12min).
Average sunshine days in September
Biem, South Sudan
- Average sunshine days in September: 6.7 days
The month with the most sunshine days is January (30.8 days).
The month with the least sunshine days is August (5.8 days).
Average UV index in September
Biem, South Sudan
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April and November (UV index 8).
The month with the lowest UV index is August (UV index 6).
Average cloud cover in September
Biem, South Sudan
- Average cloud cover in September: 34
The month with the most cloud cover is August (Cloud cover 43).
The months with the least cloud cover are January and February (Cloud cover 4).
Average visibility in September
Biem, South Sudan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, October, November and December (10km).
The months with the lowest visibility are July, August and September (9km).
