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
During September, Ngonini records an average high-temperature of a still moderately hot 27.5°C (81.5°F), marking a slight divergence from August's 25.2°C (77.4°F). September nights bring a significant cooling from the heat of the day, with averages of 15.5°C (59.9°F).Heat index
In September, the heat index is estimated at 28°C (82.4°F). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.Heat index specifics point out values are for conditions of shade and a slight breeze. 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 'feels like' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
August and September, with an average relative humidity of 56%, are the least humid months.Rainfall
In Ngonini, Swaziland, in September, it is raining for 7.3 days, with typically 11mm (0.43") of accumulated precipitation. In Ngonini, during the entire year, the rain falls for 138.5 days and collects up to 488mm (19.21") of precipitation.Daylight
In Ngonini, the average length of the day in September is 11h and 57min.On the first day of the month, sunrise is at 06:06 and sunset at 17:42. On the last day of September, sunrise is at 05:34 and sunset at 17:53 SAST.
Sunshine
In September, the average sunshine is 7.9h.UV index
The months with the highest UV index are January through March, September through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. 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. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the least humid month?
What is the average humidity in September in Ngonini?
How much does it rain in September?
How many hours of daylight does Ngonini have in September?
What time are sunrise and sunset in September in Ngonini?
How many hours of sunshine does Ngonini have in September?
What are the months with the highest UV index?
What is the UV index intensity in September?
Average temperature in September
Ngonini, Swaziland
- Average high temperature in September: 27.5°C
The warmest month (with the highest average high temperature) is December (29.1°C).
The month with the lowest average high temperature is July (23°C).
- Average low temperature in September: 15.5°C
The months with the highest average low temperature are January and February (19°C).
The coldest month (with the lowest average low temperature) is June (10.6°C).
Average pressure in September
Ngonini, Swaziland
- Average pressure in September: 1019.3mbar
The month with the highest atmospheric pressure is July (1024.1mbar).
The month with the lowest atmospheric pressure is January (1013.7mbar).
Average wind speed in September
Ngonini, Swaziland
- Average wind speed in September: 8.5km/h
The windiest month (with the highest average wind speed) is September (8.5km/h).
The calmest months (with the lowest average wind speed) are March and May (6.4km/h).
Average humidity in September
Ngonini, Swaziland
- Average humidity in September: 56%
The months with the highest relative humidity are January, February and March (78%).
The months with the lowest relative humidity are August and September (56%).
Average rainfall in September
Ngonini, Swaziland
- Average rainfall in September: 11mm
The wettest month (with the highest rainfall) is December (94mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in September
Ngonini, Swaziland
- Average rainfall days in September: 7.3 days
The month with the highest number of rainy days is December (20.5 days).
The month with the least rainy days is June (1.8 days).
Average daylight in September /
Average sunshine in September
Ngonini, Swaziland
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 36min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is February (Average sunshine: 9h and 18min).
The month with the least sunshine is April (Average sunshine: 6h and 24min).
Average sunshine days in September
Ngonini, Swaziland
- Average sunshine days in September: 21 days
The month with the most sunshine days is June (27.3 days).
The month with the least sunshine days is December (7.5 days).
Average UV index in September
Ngonini, Swaziland
- Average UV index in September: 6
The months with the highest UV index are January, February, March, September, October, November and December (UV index 6).
The months with the lowest UV index are April, May, June, July and August (UV index 5).
Average cloud cover in September
Ngonini, Swaziland
- Average cloud cover in September: 26
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 13).
Average visibility in September
Ngonini, Swaziland
- Average visibility in September: 10km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, February, March and December (8km).
Ngonini, Swaziland
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