September weather forecastRelva, Cape Verde
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Relva, Cape Verde, with temperature in the range of an average low of 25.8°C (78.4°F) and an average high of 28.1°C (82.6°F).Temperature
The unfolding of September shows an average high-temperature of a still moderately hot 28.1°C (82.6°F), indicating a slight variance from August's 27.6°C (81.7°F). In Relva, the nocturnal temperatures throughout September show a marginal dip from the daytime averages, settling at a still warm 25.8°C (78.4°F).Heat index
The average heat index in September is evaluated at a hot 32°C (89.6°F). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
The months with the highest humidity are June through September, with an average relative humidity of 79%.Rainfall
The month with the most rainfall in Relva is September, when the rain falls for 14 days and typically aggregates up to 57mm (2.24") of precipitation.Daylight
In September, the average length of the day in Relva is 12h and 13min.On the first day of the month, sunrise is at 06:24 and sunset at 18:49. On the last day of September, in Relva, sunrise is at 06:26 and sunset at 18:27 -01.
Sunshine
The average sunshine in September in Relva is 7.9h.UV index
The months with the highest UV index are August through November, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 7 translates into these guidelines:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Relva, Cape Verde
- Average high temperature in September: 28.1°C
The warmest month (with the highest average high temperature) is October (28.4°C).
The months with the lowest average high temperature are February and March (23.7°C).
- Average low temperature in September: 25.8°C
The months with the highest average low temperature are September and October (25.8°C).
The coldest month (with the lowest average low temperature) is February (20.9°C).
Average pressure in September
Relva, Cape Verde
- Average pressure in September: 1012.5mbar
The month with the highest atmospheric pressure is January (1015.2mbar).
The month with the lowest atmospheric pressure is September (1012.5mbar).
Average wind speed in September
Relva, Cape Verde
- Average wind speed in September: 16km/h
The windiest month (with the highest average wind speed) is February (25.8km/h).
The calmest month (with the lowest average wind speed) is August (14km/h).
Average humidity in September
Relva, Cape Verde
- Average humidity in September: 79%
The months with the highest relative humidity are June, July, August and September (79%).
The month with the lowest relative humidity is January (69%).
Average rainfall in September
Relva, Cape Verde
- Average rainfall in September: 57mm
The wettest month (with the highest rainfall) is September (57mm).
The driest months (with the least rainfall) are January, March and May (1mm).
Average rainfall days in September
Relva, Cape Verde
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is September (14 days).
The month with the least rainy days is January (0.7 days).
Average daylight in September /
Average sunshine in September
Relva, Cape Verde
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 18min).
- Average sunshine in September: 7h and 54min
The month with the most sunshine is May (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 7h and 0min).
Average sunshine days in September
Relva, Cape Verde
- Average sunshine days in September: 12.5 days
The months with the most sunshine days are January and May (29.3 days).
The month with the least sunshine days is September (12.5 days).
Average UV index in September
Relva, Cape Verde
- Average UV index in September: 7
The months with the highest UV index are August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July and December (UV index 6).
Average cloud cover in September
Relva, Cape Verde
- Average cloud cover in September: 44
The month with the most cloud cover is August (Cloud cover 52).
The month with the least cloud cover is May (Cloud cover 13).
Average visibility in September
Relva, Cape Verde
- 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).
