September weather forecast
Zanzibar, Tanzania

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A wooden footbridge across the water of the Indian Ocean, overlooking a beautiful palmy shore in Zanzibar, Tanzania
A wooden footbridge across the water of the Indian Ocean, overlooking a beautiful palmy shore in Zanzibar, Tanzania

Weather in September

September in Zanzibar reflects heightened dry conditions with rainfall levels dropping further to just 41mm (1.61"). Conceivably the most pleasant month, September is also noted for its slightly increased day length and maintaining the high sunshine levels. Any changes in the sea temperatures are nominal, signifying still pleasurable water activities. Preserving the glorious sunlit days, this month becomes an ideal time for safaris in the Timbavati reserve or dolphin encounters at Kizimkazi.

Temperature

Zanzibar records a slight change with September's average high-temperatures adjusting to a still warm 29°C (84.2°F) from August's 28°C (82.4°F). Zanzibar experiences a nighttime temperature average of 22°C (71.6°F) during September.

Rainfall

In September, in Zanzibar, the rain falls for 8 days. Throughout September, 41mm (1.61") of precipitation is accumulated. In Zanzibar, during the entire year, the rain falls for 125 days and collects up to 1409mm (55.47") of precipitation.

Sea temperature

In Zanzibar, the average seawater temperature in September is 25.9°C (78.6°F).
Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as ideal and highly pleasant for extended enjoyment in all water activities.

Daylight

In Zanzibar, Tanzania, the average length of the day in September is 12h and 4min.
On the first day of September, sunrise is at 06:23 and sunset at 18:23. On the last day of the month, sunrise is at 06:08 and sunset at 18:17 EAT.

Sunshine

The months with the most sunshine are January, February, June through December, with an average of 8h of sunshine.

UV index

The months with the highest UV index are January through April, September through December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 12 during September translates into these guidelines:
Take all necessary precautions, as unprotected skin can burn in minutes. 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. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Even on overcast days, a sunscreen with a sun protection factor of no less than 30 should be generously applied and reapplied, particularly after swimming or outdoor activities. Caution! Sand and water surfaces escalate the UV intensity from the Sun.

Frequently asked questions

How hot is it in Zanzibar in September?

In September, the average high-temperature and low-temperature in Zanzibar are 29°C (84.2°F) and 22°C (71.6°F) respectively.

How much does it rain in Zanzibar in September?

In Zanzibar, Tanzania, in September, during 8 rainfall days, 41mm (1.61") of precipitation is typically accumulated.

What is the sea water temperature in September in Zanzibar?

In September, the average sea temperature in Zanzibar is 25.9°C (78.6°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Zanzibar have in September?

The average day length in September in Zanzibar is 12h and 4min.

When are sunrise and sunset in September in Zanzibar?

In September, on the first day of the month, sunrise is at 06:23 and sunset at 18:23. On the last day of the month, sunrise is at 06:08 and sunset at 18:17 EAT.

What are the months with the most sunshine in Zanzibar?

The months with the most sunshine are January, February, June through December, with an average of 8h of sunshine.

How long on average sun shines in September in Zanzibar?

In September, the average sunshine duration is 8h.

What are the months with the highest UV index in Zanzibar?

January through April, September through December, with an average maximum UV index of 12, are months with the highest UV index.

What is the UV index intensity in September in Zanzibar?

In September, the average daily maximum UV index in Zanzibar is 12. A UV Index reading of 11, and higher, represents an extreme health threat from unsafe exposure to Sun's UV rays.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in September
Zanzibar, Tanzania

Average temperature in September - Zanzibar, Tanzania
  • Average high temperature in September: 29°C

The warmest months (with the highest average high temperature) are February and March (33°C).
The months with the lowest average high temperature are June, July and August (28°C).

  • Average low temperature in September: 22°C

The months with the highest average low temperature are March and April (25°C).
The coldest months (with the lowest average low temperature) are July, August and September (22°C).

Average rainfall in September
Zanzibar, Tanzania

Average rainfall in September - Zanzibar, Tanzania
  • Average rainfall in September: 41mm

The wettest month (with the highest rainfall) is April (320mm).
The driest month (with the least rainfall) is July (28mm).

Average rainfall days in September
Zanzibar, Tanzania

Average rainfall days in September - Zanzibar, Tanzania
  • Average rainfall days in September: 8 days

The month with the highest number of rainy days is April (17 days).
The month with the least rainy days is February (5 days).

Average sea temperature in September
Zanzibar, Tanzania

Average sea temperature in September - Zanzibar, Tanzania
  • Average sea temperature in September: 25.9°C

The best months for swimming (with the highest average sea temperature) are March and April (29.2°C).
The coldest month (with the lowest average sea temperature) is August (25.6°C).

Average daylight in September /
Average sunshine in September
Zanzibar, Tanzania

Average daylight in September / Average sunshine in September - Zanzibar, 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

The months with the most sunshine are January, February, June, July, August, September, October, November and December (Average sunshine: 8h).
The months with the least sunshine are April and May (Average sunshine: 6h).

Average UV index in September
Zanzibar, Tanzania

Average UV index in September - Zanzibar, Tanzania
  • Average UV index in September: 12

The months with the highest UV index are January, February, March, April, September, October, November and December (UV index 12).
The month with the lowest UV index is June (UV index 9).

Zanzibar, Tanzania

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