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
In Hannah, temperatures reach their average annual highs in September, measuring 28.9°C (84°F) and a minimum average of 27.7°C (81.9°F).Heat index
The average heat index in September is evaluated at a tropical 34°C (93.2°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.Evaluating the heat index requires understanding its values in the shade and with gentle winds. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. 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
In September, the average relative humidity is 77%.Rainfall
In Hannah, in September, it is raining for 23.4 days, with typically 110mm (4.33") of accumulated precipitation. Throughout the year, there are 262.1 rainfall days, and 835mm (32.87") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 14min.On the first day of the month, sunrise is at 06:04 and sunset at 18:32. On the last day of September, sunrise is at 06:08 and sunset at 18:07 AST.
Sunshine
In Hannah, the average sunshine in September is 8.6h.UV index
The months with the highest UV index in Hannah are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Hannah. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily high UV index of 7 in September leads to these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest?
Is it hot during September?
What is the average humidity in September in Hannah?
How much does it rain in September?
How many hours of daylight does Hannah have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Hannah have in September?
What are the months with the highest UV index?
What are the months with the lowest UV index?
What is the UV index intensity in September?
Average temperature in September
Hannah, British Virgin Islands
- Average high temperature in September: 28.9°C
The warmest month (with the highest average high temperature) is September (28.9°C).
The months with the lowest average high temperature are February and March (25.9°C).
- Average low temperature in September: 27.7°C
The month with the highest average low temperature is October (27.8°C).
The coldest month (with the lowest average low temperature) is March (24.7°C).
Average pressure in September
Hannah, British Virgin Islands
- Average pressure in September: 1013.5mbar
The month with the highest atmospheric pressure is January (1016.7mbar).
The month with the lowest atmospheric pressure is October (1012.7mbar).
Average wind speed in September
Hannah, British Virgin Islands
- Average wind speed in September: 19.1km/h
The windiest month (with the highest average wind speed) is July (24.4km/h).
The calmest month (with the lowest average wind speed) is October (18.2km/h).
Average humidity in September
Hannah, British Virgin Islands
- Average humidity in September: 77%
The months with the highest relative humidity are June and July (79%).
The months with the lowest relative humidity are January, February, March, October and December (75%).
Average rainfall in September
Hannah, British Virgin Islands
- Average rainfall in September: 110mm
The wettest months (with the highest rainfall) are August and October (113mm).
The driest month (with the least rainfall) is February (28mm).
Average rainfall days in September
Hannah, British Virgin Islands
- Average rainfall days in September: 23.4 days
The month with the highest number of rainy days is November (24.9 days).
The month with the least rainy days is February (17.5 days).
Average daylight in September /
Average sunshine in September
Hannah, British Virgin Islands
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Hannah, British Virgin Islands
- Average sunshine days in September: 3.5 days
The month with the most sunshine days is February (7.1 days).
The month with the least sunshine days is August (1.7 days).
Average UV index in September
Hannah, British Virgin Islands
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
Hannah, British Virgin Islands
- Average cloud cover in September: 37
The months with the most cloud cover are May, July and August (Cloud cover 41).
The month with the least cloud cover is February (Cloud cover 34).
Average visibility in September
Hannah, British Virgin Islands
- 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).
