September weather forecast
Zanzibar, Tanzania

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.