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
The introduction of September sees an average high-temperature of a still moderately hot 27.2°C (81°F), hardly deviating from August. Nighttime temperatures hover around an average low of 23.9°C (75°F) in September, a slight descent from daytime highs.Heat index
The average heat index in September is evaluated at a tropical 30°C (86°F). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.The heat index's values are generally associated with conditions in shade and light breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', offers an insight into how hot it feels when we factor in moisture content. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
In Stone Town, the average relative humidity in September is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 17.2 days and typically collects 31mm (1.22") of precipitation.Daylight
In September, the average length of the day is 12h and 4min.On the first day of the month, sunrise is at 06:23 and sunset at 18:23. On the last day of September, sunrise is at 06:08 and sunset at 18:17 EAT.
Sunshine
In Stone Town, the average sunshine in September is 8.7h.UV index
The months with the lowest UV index are April through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 6 during September leads to these advisories:
Shun overexposure. Protection from sun ravages is indispensable. 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. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
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 long on average sun shines in September in Stone Town?
What are the months with the lowest UV index in Stone Town?
What is the UV index intensity in September?
Average temperature in September
Stone Town, Tanzania
- Average high temperature in September: 27.2°C
The warmest month (with the highest average high temperature) is March (29.9°C).
The month with the lowest average high temperature is August (26.8°C).
- Average low temperature in September: 23.9°C
The month with the highest average low temperature is March (27.2°C).
The coldest month (with the lowest average low temperature) is August (23.5°C).
Average pressure in September
Stone Town, Tanzania
- Average pressure in September: 1015.8mbar
The month with the highest atmospheric pressure is July (1016.9mbar).
The month with the lowest atmospheric pressure is February (1010.2mbar).
Average wind speed in September
Stone Town, Tanzania
- Average wind speed in September: 15.9km/h
The windiest month (with the highest average wind speed) is July (20.6km/h).
The calmest month (with the lowest average wind speed) is November (11.8km/h).
Average humidity in September
Stone Town, Tanzania
- Average humidity in September: 76%
The months with the highest relative humidity are January, April, May and November (78%).
The months with the lowest relative humidity are June and July (75%).
Average rainfall in September
Stone Town, Tanzania
- Average rainfall in September: 31mm
The wettest month (with the highest rainfall) is April (296mm).
The driest month (with the least rainfall) is September (31mm).
Average rainfall days in September
Stone Town, Tanzania
- Average rainfall days in September: 17.2 days
The month with the highest number of rainy days is April (27.6 days).
The month with the least rainy days is February (14.2 days).
Average daylight in September /
Average sunshine in September
Stone Town, Tanzania
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 48min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is November (Average sunshine: 10h and 42min).
The month with the least sunshine is May (Average sunshine: 8h and 6min).
Average sunshine days in September
Stone Town, Tanzania
- Average sunshine days in September: 5.9 days
The month with the most sunshine days is February (7.9 days).
The month with the least sunshine days is April (1.7 days).
Average UV index in September
Stone Town, Tanzania
- Average UV index in September: 6
The months with the highest UV index are January, February, March, October, November and December (UV index 7).
The months with the lowest UV index are April, May, June, July, August and September (UV index 6).
Average cloud cover in September
Stone Town, Tanzania
- Average cloud cover in September: 32
The month with the most cloud cover is April (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 28).
Average visibility in September
Stone Town, Tanzania
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are April and May (9km).
Stone Town, Tanzania
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