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
September's presence marks an average high-temperature of a still hot 31.7°C (89.1°F), subtly varied from August's 30.3°C (86.5°F). In Yelwa, September nights cool down to an average of 23.6°C (74.5°F).Heat index
September's mean heat index is estimated at a blistering 41°C (105.8°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.Keep in mind the heat index values are meant for areas in shade and with light wind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', evaluates the perceived heat by adding the effect of moisture in the air. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
In September, the average relative humidity is 75%.Rainfall
In Yelwa, in September, during 18.1 rainfall days, 66mm (2.6") of precipitation is typically accumulated. In Yelwa, during the entire year, the rain falls for 99.2 days and collects up to 430mm (16.93") of precipitation.Daylight
In September, the average length of the day is 12h and 11min.On the first day of the month, sunrise is at 06:31 and sunset at 18:50. On the last day of September, sunrise is at 06:29 and sunset at 18:31 WAT.
Sunshine
In Yelwa, the average sunshine in September is 8.8h.UV index
The months with the lowest UV index are January, June through September, November and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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 are sunrise and sunset in September?
How many hours of sunshine does Yelwa have in September?
When is the lowest UV index in Yelwa?
What is the UV index reading in September?
Average temperature in September
Yelwa, Nigeria
- Average high temperature in September: 31.7°C
The warmest month (with the highest average high temperature) is March (41.5°C).
The month with the lowest average high temperature is August (30.3°C).
- Average low temperature in September: 23.6°C
The month with the highest average low temperature is May (27.9°C).
The coldest month (with the lowest average low temperature) is January (18.6°C).
Average pressure in September
Yelwa, Nigeria
- Average pressure in September: 1011.5mbar
The month with the highest atmospheric pressure is August (1012mbar).
The month with the lowest atmospheric pressure is April (1007.3mbar).
Average wind speed in September
Yelwa, Nigeria
- Average wind speed in September: 6.7km/h
The windiest month (with the highest average wind speed) is May (10.1km/h).
The calmest month (with the lowest average wind speed) is November (6.3km/h).
Average humidity in September
Yelwa, Nigeria
- Average humidity in September: 75%
The month with the highest relative humidity is August (79%).
The month with the lowest relative humidity is January (18%).
Average rainfall in September
Yelwa, Nigeria
- Average rainfall in September: 66mm
The wettest month (with the highest rainfall) is August (148mm).
The driest months (with the least rainfall) are January, February, November and December (0mm).
Average rainfall days in September
Yelwa, Nigeria
- Average rainfall days in September: 18.1 days
The month with the highest number of rainy days is August (22.3 days).
The month with the least rainy days is December (0 days).
Average daylight in September /
Average sunshine in September
Yelwa, Nigeria
- 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 30min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are January, November and December (Average sunshine: 10h and 0min).
The month with the least sunshine is August (Average sunshine: 7h and 18min).
Average sunshine days in September
Yelwa, Nigeria
- Average sunshine days in September: 10.4 days
The month with the most sunshine days is December (31 days).
The month with the least sunshine days is August (6.4 days).
Average UV index in September
Yelwa, Nigeria
- Average UV index in September: 7
The months with the highest UV index are February, March, April, May and October (UV index 8).
The months with the lowest UV index are January, June, July, August, September, November and December (UV index 7).
Average cloud cover in September
Yelwa, Nigeria
- Average cloud cover in September: 31
The month with the most cloud cover is August (Cloud cover 46).
The months with the least cloud cover are January and December (Cloud cover 3).
Average visibility in September
Yelwa, Nigeria
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (10km).
The months with the lowest visibility are August and September (9km).
