September weather forecastKoyonzo, Kenya
September
Weather in September
September, the first month of the autumn in Koyonzo, is still a warm month, with an average temperature ranging between min 16.1°C (61°F) and max 27.2°C (81°F).Temperature
The arrival of September sees an average high-temperature of a still moderately hot 27.2°C (81°F), hardly diverging from August's 26.2°C (79.2°F). During the nights in September, the temperature averages to a refreshing 16.1°C (61°F).Heat index
During September, the heat index is calculated to be a hot 30°C (86°F). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.Consider that heat index readings are for situations in the shade and light wind. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Humidity
In September, the average relative humidity is 77%.Rainfall
In Koyonzo, in September, it is raining for 27.5 days, with typically 120mm (4.72") of accumulated precipitation. Throughout the year, there are 300.8 rainfall days, and 1573mm (61.93") of precipitation is accumulated.Snowfall
The only month with snowfall is September. The month with the most snowfall in Koyonzo, Kenya, is September, when snow falls for 0.1 days and typically aggregates up to 1mm (0.04") of snow.Daylight
The average length of the day in September in Koyonzo is 12h and 7min.On the first day of September in Koyonzo, sunrise is at 06:38 and sunset at 18:45. On the last day of the month, sunrise is at 06:28 and sunset at 18:35 EAT.
Sunshine
In September, the average sunshine is 9.4h.UV index
January through March, September, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 6 during September translates into the following directions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Koyonzo, Kenya
- Average high temperature in September: 27.2°C
The warmest month (with the highest average high temperature) is February (31.3°C).
The month with the lowest average high temperature is June (25.2°C).
- Average low temperature in September: 16.1°C
The month with the highest average low temperature is February (17.6°C).
The coldest month (with the lowest average low temperature) is July (15.5°C).
Average pressure in September
Koyonzo, Kenya
- Average pressure in September: 1013.1mbar
The month with the highest atmospheric pressure is July (1014.6mbar).
The month with the lowest atmospheric pressure is February (1010.8mbar).
Average wind speed in September
Koyonzo, Kenya
- Average wind speed in September: 4.6km/h
The windiest month (with the highest average wind speed) is February (6.7km/h).
The calmest months (with the lowest average wind speed) are August and September (4.6km/h).
Average humidity in September
Koyonzo, Kenya
- Average humidity in September: 77%
The month with the highest relative humidity is May (85%).
The month with the lowest relative humidity is February (55%).
Average rainfall in September
Koyonzo, Kenya
- Average rainfall in September: 120mm
The wettest month (with the highest rainfall) is May (257mm).
The driest month (with the least rainfall) is February (36mm).
Average rainfall days in September
Koyonzo, Kenya
- Average rainfall days in September: 27.5 days
The month with the highest number of rainy days is May (30.6 days).
The month with the least rainy days is February (11.8 days).
Average snowfall in September
Koyonzo, Kenya
- Average snowfall in September: 1mm
The month with the highest snowfall is September (1mm).
The months with the least snowfall are January, February, March, April, May, June, July, August, October, November and December (0mm).
Average snowfall days in September
Koyonzo, Kenya
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Koyonzo, Kenya
- Average daylight in September: 12h and 6min
The month with the longest days is June (Average daylight: 12h and 6min).
The month with the shortest days is December (Average daylight: 12h and 6min).
- Average sunshine in September: 9h and 24min
The months with the most sunshine are January and February (Average sunshine: 9h and 48min).
The month with the least sunshine is May (Average sunshine: 8h and 30min).
Average sunshine days in September
Koyonzo, Kenya
- Average sunshine days in September: 0.6 days
The month with the most sunshine days is January (13.7 days).
The month with the least sunshine days is June (0.2 days).
Average UV index in September
Koyonzo, Kenya
- Average UV index in September: 6
The months with the highest UV index are January, February, March, September, November and December (UV index 6).
The months with the lowest UV index are April, May, June, July, August and October (UV index 5).
Average cloud cover in September
Koyonzo, Kenya
- Average cloud cover in September: 29
The month with the most cloud cover is May (Cloud cover 44).
The month with the least cloud cover is February (Cloud cover 14).
Average visibility in September
Koyonzo, Kenya
- Average visibility in September: 9km
The months with the highest visibility are January, February and March (10km).
The months with the lowest visibility are April, May and June (8km).
