Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
The start of September marks an average high-temperature of a still pleasant 22.8°C (73°F), hardly distinguishable from the conditions in August. In Kiamwenji, a significant divergence from daytime highs is recorded, with average lows of 10.2°C (50.4°F) during September nights.Humidity
The average relative humidity in September is 73%.Rainfall
In Kiamwenji, Kenya, during September, the rain falls for 14.7 days and regularly aggregates up to 30mm (1.18") of precipitation. Throughout the year, there are 212.1 rainfall days, and 663mm (26.1") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 7min.On the first day of September, sunrise is at 06:28 and sunset at 18:34. On the last day of the month, sunrise is at 06:17 and sunset at 18:25 EAT.
Sunshine
The average sunshine in September is 9.3h.UV index
The months with the highest UV index in Kiamwenji are January through May, September, October and December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 5 in September translates into these instructions:
Prioritize safety - Recommendations to avert sunburn are shared. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
When is the highest UV index?
What is the UV index reading in September?
Average temperature in September
Kiamwenji, Kenya
- Average high temperature in September: 22.8°C
The warmest months (with the highest average high temperature) are February and March (25.6°C).
The month with the lowest average high temperature is July (20.6°C).
- Average low temperature in September: 10.2°C
The month with the highest average low temperature is April (12°C).
The coldest month (with the lowest average low temperature) is July (9.3°C).
Average pressure in September
Kiamwenji, Kenya
- Average pressure in September: 1015.4mbar
The month with the highest atmospheric pressure is July (1016.4mbar).
The month with the lowest atmospheric pressure is March (1013.5mbar).
Average wind speed in September
Kiamwenji, Kenya
- Average wind speed in September: 7.5km/h
The windiest months (with the highest average wind speed) are February and October (7.8km/h).
The calmest month (with the lowest average wind speed) is June (6.5km/h).
Average humidity in September
Kiamwenji, Kenya
- Average humidity in September: 73%
The months with the highest relative humidity are May and June (83%).
The month with the lowest relative humidity is February (65%).
Average rainfall in September
Kiamwenji, Kenya
- Average rainfall in September: 30mm
The wettest month (with the highest rainfall) is April (104mm).
The driest month (with the least rainfall) is January (29mm).
Average rainfall days in September
Kiamwenji, Kenya
- Average rainfall days in September: 14.7 days
The month with the highest number of rainy days is April (25 days).
The month with the least rainy days is February (10.1 days).
Average daylight in September /
Average sunshine in September
Kiamwenji, Kenya
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 12min).
The month with the shortest days is June (Average daylight: 12h and 6min).
- Average sunshine in September: 9h and 2min
The months with the most sunshine are January and February (Average sunshine: 9h and 30min).
The months with the least sunshine are May and July (Average sunshine: 8h and 30min).
Average sunshine days in September
Kiamwenji, Kenya
- Average sunshine days in September: 9 days
The month with the most sunshine days is January (17.1 days).
The month with the least sunshine days is April (3.3 days).
Average UV index in September
Kiamwenji, Kenya
- Average UV index in September: 5
The months with the highest UV index are January, February, March, April, May, September, October and December (UV index 5).
The months with the lowest UV index are June, July, August and November (UV index 4).
Average cloud cover in September
Kiamwenji, Kenya
- Average cloud cover in September: 40
The month with the most cloud cover is May (Cloud cover 57).
The month with the least cloud cover is February (Cloud cover 23).
Average visibility in September
Kiamwenji, Kenya
- Average visibility in September: 8km
The months with the highest visibility are January and February (9km).
The month with the lowest visibility is May (6km).
