Mombasa Weather in September
Mombasa in September averages 29°C (84°F) during the day and 23°C (73°F) at night. Some rainfall is typical for this time of year.
Rainfall in Mombasa in September
Historically, the month has about 12 days of rain, averaging 55 mm (2.2 in) in total. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Mombasa in September
September tends to be one of the excellent months in Mombasa, with 29°C (84°F) in the afternoon and 23°C (73°F) overnight. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 23°C (73°F) overnight, nights are warm enough to sit outside comfortably in light clothing.
Sunshine in Mombasa in September
The city usually sees around 246 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Wind Speed in Mombasa in September
Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.
Average water temperature in September
At 25°C (77°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Kenya, check out our Mombasa's climate page.
Mombasa Temperature in September
Min Temperature
23°C (73°F)
Max Temperature
29°C (84°F)
Water Temperature
25°C (77°F)
Chance of Rain
38%
Precipitation
55 mm (2.2 in)
Rainy days
12 days
Humidity
80%
Windspeed
4 m/s (8 knots)
Sunshine
246 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Mombasa typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 22°C (72°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Mombasa in September
Browse day-by-day weather records for Mombasa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mombasa historical weather extremes in September
According to our 26 years of weather records for Mombasa, the following extremes were recorded between 1999 and 2025.
- The hottest September day on record in Mombasa reached 34°C (93°F) (September 13, 2008).
- The coldest September day was on September 16, 1999, with a maximum of 24°C (75°F).
- Nighttime temperatures dropped to 19°C (66°F) on September 3, 2020, marking the coldest September night on record.
Best Places in Kenya in September
Find out more about the weather in Kenya and which places have the best travel conditions in this month. See all of Kenya in September →
perfect weather
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What to Wear in Mombasa in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 25°C (77°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Mombasa in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Kenya, check out our Mombasa's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Mombasa climate overview or explore weather in Kenya.
