September weather forecastVoi, Kenya

September

Weather in September

September in Voi sees a slight increase in temperature from August, with the warmth becoming increasingly prominent. This change in weather brings a sense of vigor to the city, with increased sunlight enhancing the outdoor experience. Indicative of the changing climate is the increase in rainfall to 6mm (0.24") from the previous month. Gradually declining pressure and an increase in cloud% mark a shift in the weather pattern as October approaches.

Temperature

The initiation of September in Voi sees an average high-temperature of a still warm 28.7°C (83.7°F), showing minor variations from the previous month. The average temperature in Voi during September nights dips to a refreshing 18.5°C (65.3°F).

Heat index

The heat index in September is computed to be a tropical 31°C (87.8°F). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.

Humidity

The least humid month in Voi, Kenya, is September, with an average relative humidity of 64%.

Rainfall

In Voi, in September, it is raining for 5.5 days, with typically 6mm (0.24") of accumulated precipitation. In Voi, during the entire year, the rain falls for 180.9 days and collects up to 733mm (28.86") of precipitation.

Daylight

In September, the average length of the day in Voi is 12h and 5min.
On the first day of September in Voi, sunrise is at 06:24 and sunset at 18:27. On the last day of the month, sunrise is at 06:11 and sunset at 18:19 EAT.

Sunshine

In September, the average sunshine is 9h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 6. January through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: In September, the maximum UV index of 6 transforms into these recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

Frequently asked questions

The average high-temperature, in September, in Voi, is 28.7°C (83.7°F), while the average low-temperature is 18.5°C (65.3°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 31°C (87.8°F).

With an average relative humidity of 64%, September is the least humid month in Voi.

In September, the average relative humidity in Voi is 64%.

In Voi, Kenya, in September, during 5.5 rainfall days, 6mm (0.24") of precipitation is typically accumulated.

The average day length in September is 12h and 5min.

In September, on the first day of the month, sunrise is at 06:24 and sunset at 18:27. On the last day of the month, sunrise is at 06:11 and sunset at 18:19 EAT.

The average sunshine duration in September in Voi, Kenya, is 9h.

The months with the highest UV index in Voi are January through December, with an average maximum UV index of 6.

January through December, with an average maximum UV index of 6, are months with the lowest UV index in Voi.

In Voi, Kenya, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Voi, Kenya

  • Average high temperature in September: 28.7°C

The warmest months (with the highest average high temperature) are February and March (30.8°C).
The month with the lowest average high temperature is July (27.6°C).

  • Average low temperature in September: 18.5°C

The month with the highest average low temperature is March (20.9°C).
The coldest month (with the lowest average low temperature) is July (17.7°C).

Average pressure in September
Voi, Kenya

  • Average pressure in September: 1015.6mbar

The month with the highest atmospheric pressure is July (1016.6mbar).
The month with the lowest atmospheric pressure is February (1011.1mbar).

Average wind speed in September
Voi, Kenya

  • Average wind speed in September: 15.8km/h

The windiest month (with the highest average wind speed) is August (16.3km/h).
The calmest month (with the lowest average wind speed) is December (8.1km/h).

Average humidity in September
Voi, Kenya

  • Average humidity in September: 64%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is September (64%).

Average rainfall in September
Voi, Kenya

  • Average rainfall in September: 6mm

The wettest month (with the highest rainfall) is December (145mm).
The driest month (with the least rainfall) is July (1mm).

Average rainfall days in September
Voi, Kenya

  • Average rainfall days in September: 5.5 days

The month with the highest number of rainy days is December (27 days).
The month with the least rainy days is July (2.6 days).

Average daylight in September /
Average sunshine in September
Voi, Kenya

  • Average daylight in September: 12h and 6min

The month with the longest days is December (Average daylight: 12h and 18min).
The month with the shortest days is June (Average daylight: 11h and 54min).

  • Average sunshine in September: 9h and 0min

The months with the most sunshine are June and July (Average sunshine: 9h and 12min).
The months with the least sunshine are November and December (Average sunshine: 8h and 12min).

Average sunshine days in September
Voi, Kenya

  • Average sunshine days in September: 21.5 days

The month with the most sunshine days is July (27 days).
The month with the least sunshine days is April (2.3 days).

Average UV index in September
Voi, Kenya

  • Average UV index in September: 6

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).

Average cloud cover in September
Voi, Kenya

  • Average cloud cover in September: 30

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is September (Cloud cover 30).

Average visibility in September
Voi, Kenya

  • Average visibility in September: 10km

The months with the highest visibility are June, July, August, September and October (10km).
The months with the lowest visibility are January, April and December (8km).