Weather in Kololi in September

How September compares

September is the 8th warmest month of the year in Kololi and ranks 35th of 134 destinations we compare for September - see where else is hot in September. Against London's average high of 18.6°C in September, Kololi is 10.3°C warmer by day and 14.2°C warmer at night.

Daytime and night-time in September

The typical September day in Kololi peaks at 28.9°C, but that is an average: the warmest 10% of days reach 30.0°C or more. About 100% of days top 25°C and 1 in 9 pass 30°C. Nights average 25.4°C; one night in ten drops to 24.3°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 31.3°C (2017-09-12) and the coldest night 23.3°C (1993-09-22).

Rain in September

Wet (more than 8 rainy days): about 20 days with 1 mm or more, 192 mm in total. Year to year it varies a lot - the wettest September was 2010 with 355 mm, the driest 2005 with 101 mm. Humidity averages 84%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in September

The sea averages 28.7°C - warm enough to swim (22°c+). Depending on the year it ranges from 28.2°C to 29.2°C. For the warmest sea here, come in October (29.3°C).

Sunshine and daylight

Around 3.1 hours of sunshine a day (estimated from cloud cover), 12.1 hours of daylight: the sun rises about 06:56 and sets about 19:08 local time in mid-September. Average cloud cover is 74%.

Is September a good time to visit Kololi?

It is a reasonable choice: hot days but expect showers. The best months for Kololi on our scoring are April, March, May; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Warm swimming, sticky days and nights

The sea averages 28.7°C, making swimming appealing when conditions allow, rather than something you need to brace yourself for. On land, the catch is the humidity: at 84%, the warmth can feel sticky even without exceptional temperatures. Plan for loose, lightweight clothing and take a break from the heat at midday rather than filling the day with exertion. Evenings are warm too, so do not expect sunset to bring much cooling. Air conditioning is a sensible priority when choosing accommodation. This is a better fit for travellers comfortable with humid heat than for anyone who needs cool nights to sleep well.

Leave room for rain in your plans

September is wet, with about 192 mm of rain across the month, so rain needs to be part of your decision rather than an afterthought. There are about 3.1 hours of sunshine within 12.1 hours of daylight: long days do not translate into long stretches of sun. Keep swimming and other outdoor plans movable, pack a lightweight waterproof, and be prepared to spend time under cover. The monthly figures do not tell you when rain will fall, so do not build your plans around an assumed dry morning or afternoon. If a grey or wet spell would spoil the holiday for you, September is a difficult month to recommend.