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
Weather in September
Temperature
The transition from August to September brings an average high-temperature of a still agreeable 22.8°C (73°F), barely different from August's 21.4°C (70.5°F). Nyeri observes a substantial disparity between daytime high and the average low-temperature of 10.2°C (50.4°F) during September nights.Humidity
The average relative humidity in September in Nyeri is 73%.Rainfall
In September, the rain falls for 14.7 days. Throughout September, 30mm (1.18") of precipitation is accumulated. In Nyeri, during the entire year, the rain falls for 212.1 days and collects up to 663mm (26.1") of precipitation.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 18:35. On the last day of the month, sunrise is at 06:18 and sunset at 18:25 EAT.
Sunshine
In September, the average sunshine in Nyeri is 9.3h.UV index
January through May, September, October and December, with an average maximum UV index of 5, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A daily high UV index of 5 in September leads to these guidelines:
Exercise prevention - Precautions against solar damage are endorsed. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Nyeri?
What is the average humidity in September in Nyeri?
How many days does it rain in September in Nyeri?
How many hours of daylight does Nyeri have in September?
When is the sunrise / sunset in September in Nyeri?
How long on average sun shines in September in Nyeri?
What is the month with the highest UV index in Nyeri?
What is the UV index reading in September in Nyeri?
Average temperature in September
Nyeri, 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
Nyeri, 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
Nyeri, 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
Nyeri, 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
Nyeri, 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
Nyeri, 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
Nyeri, Kenya
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 6min).
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
Nyeri, 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
Nyeri, 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
Nyeri, 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
Nyeri, 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).
Nyeri, Kenya
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