September weather forecastMombasa, Kenya
September
Weather in September
Notwithstanding the slight increase in rainfall from 13mm (0.51") in August to 12mm (0.47"), September in Mombasa extends the warm sunshine and clear skies. The weather tends to remain predictably pleasant with winds adding a cooler dimension to the otherwise warm temperatures. As compared to August, September registers a minor dip in temperature. Transitioning into October, Mombasa witnesses a sharp rise in rainfall, indicating onset of the short rains.Temperature
September's weather records an average high-temperature of a still moderately hot 28°C (82.4°F), showing little deviation from August. Mombasa's nighttime temperature in September falls to an average of 22.5°C (72.5°F).Heat index
September's heat index is estimated at a tropical 32°C (89.6°F). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', integrates the air's temperature and its humidity to showcase the felt temperature by people. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Humidity
January, May, September through December, with an average relative humidity of 77%, are the most humid months in Mombasa.Rainfall
In September, in Mombasa, the rain falls for 11.2 days. Throughout September, 12mm (0.47") of precipitation is accumulated. Throughout the year, there are 167.2 rainfall days, and 312mm (12.28") of precipitation is accumulated.Sea temperature
In Mombasa, in September, the average water temperature is 25.8°C (78.4°F).Note: Swimming, diving, and other water activities in the temperature range of 25°C (77°F) to 29°C (84.2°F) are perceived as very enjoyable and comfortable for prolonged durations.
Daylight
In Mombasa, the average length of the day in September is 12h and 5min.On the first day of the month, sunrise is at 06:20 and sunset at 18:22. On the last day of September, sunrise is at 06:06 and sunset at 18:15 EAT.
Sunshine
The average sunshine in September in Mombasa is 8.4h.UV index
January through June, September through December, with an average maximum UV index of 7, are months with the highest UV index in Mombasa, Kenya. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 7 translates into these guidelines:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mombasa, Kenya
- Average high temperature in September: 28°C
The warmest month (with the highest average high temperature) is March (31.6°C).
The month with the lowest average high temperature is July (27.3°C).
- Average low temperature in September: 22.5°C
The months with the highest average low temperature are March and April (25.3°C).
The coldest month (with the lowest average low temperature) is August (22°C).
Average pressure in September
Mombasa, Kenya
- Average pressure in September: 1015.3mbar
The month with the highest atmospheric pressure is July (1016.1mbar).
The month with the lowest atmospheric pressure is February (1010.5mbar).
Average wind speed in September
Mombasa, Kenya
- Average wind speed in September: 18.6km/h
The windiest month (with the highest average wind speed) is July (23.2km/h).
The calmest month (with the lowest average wind speed) is March (11.9km/h).
Average humidity in September
Mombasa, Kenya
- Average humidity in September: 77%
The months with the highest relative humidity are January, May, September, October, November and December (77%).
The month with the lowest relative humidity is July (74%).
Average rainfall in September
Mombasa, Kenya
- Average rainfall in September: 12mm
The wettest month (with the highest rainfall) is May (48mm).
The driest month (with the least rainfall) is June (10mm).
Average rainfall days in September
Mombasa, Kenya
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is December (21.2 days).
The month with the least rainy days is February (8.8 days).
Average sea temperature in September
Mombasa, Kenya
- Average sea temperature in September: 25.8°C
The best month for swimming (with the highest average sea temperature) is April (29.3°C).
The coldest month (with the lowest average sea temperature) is August (25.4°C).
Average daylight in September /
Average sunshine in September
Mombasa, Kenya
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 24min).
The month with the shortest days is June (Average daylight: 11h and 54min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is November (Average sunshine: 10h and 30min).
The month with the least sunshine is May (Average sunshine: 7h and 54min).
Average sunshine days in September
Mombasa, Kenya
- Average sunshine days in September: 8.8 days
The month with the most sunshine days is February (15.3 days).
The month with the least sunshine days is December (7 days).
Average UV index in September
Mombasa, Kenya
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, September, October, November and December (UV index 7).
The months with the lowest UV index are July and August (UV index 6).
Average cloud cover in September
Mombasa, Kenya
- Average cloud cover in September: 42
The month with the most cloud cover is October (Cloud cover 45).
The month with the least cloud cover is December (Cloud cover 30).
Average visibility in September
Mombasa, Kenya
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
