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
Siyu's weather in September, with an average high-temperature of a still moderately hot 28.1°C (82.6°F), subtly shifts from August's 27.4°C (81.3°F). During September, nights cool slightly to an average low of 24.2°C (75.6°F).Heat index
The heat index value for September is estimated at a hot 32°C (89.6°F). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a single figure representing how weather conditions feel when combining temperature and humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
The average relative humidity in September is 75%.Rainfall
In Siyu, in September, during 12.6 rainfall days, 19mm (0.75") of precipitation is typically accumulated. In Siyu, Kenya, during the entire year, the rain falls for 192.5 days and collects up to 641mm (25.24") of precipitation.Daylight
In September, the average length of the day is 12h and 6min.On the first day of September in Siyu, sunrise is at 06:13 and sunset at 18:17. On the last day of the month, sunrise is at 06:01 and sunset at 18:09 EAT.
Sunshine
In September, the average sunshine in Siyu is 8.8h.UV index
January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 7 during September, leads to the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How many days does it rain in September?
How many hours of daylight does Siyu have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What are the months with the highest UV index?
What is the month with the lowest UV index?
What is the UV index intensity in September?
Average temperature in September
Siyu, Kenya
- Average high temperature in September: 28.1°C
The warmest month (with the highest average high temperature) is March (31.3°C).
The month with the lowest average high temperature is August (27.4°C).
- Average low temperature in September: 24.2°C
The month with the highest average low temperature is April (26.7°C).
The coldest month (with the lowest average low temperature) is August (24°C).
Average pressure in September
Siyu, Kenya
- Average pressure in September: 1014.2mbar
The months with the highest atmospheric pressure are July and August (1014.9mbar).
The month with the lowest atmospheric pressure is March (1009.9mbar).
Average wind speed in September
Siyu, Kenya
- Average wind speed in September: 23.3km/h
The windiest month (with the highest average wind speed) is July (27.8km/h).
The calmest month (with the lowest average wind speed) is November (14.5km/h).
Average humidity in September
Siyu, Kenya
- Average humidity in September: 75%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is July (74%).
Average rainfall in September
Siyu, Kenya
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is May (156mm).
The driest month (with the least rainfall) is February (7mm).
Average rainfall days in September
Siyu, Kenya
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is May (24.4 days).
The month with the least rainy days is February (3.6 days).
Average daylight in September /
Average sunshine in September
Siyu, 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 0min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is November (Average sunshine: 11h and 0min).
The month with the least sunshine is May (Average sunshine: 7h and 48min).
Average sunshine days in September
Siyu, Kenya
- Average sunshine days in September: 9.8 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is May (4.6 days).
Average UV index in September
Siyu, Kenya
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
Siyu, Kenya
- Average cloud cover in September: 40
The month with the most cloud cover is May (Cloud cover 46).
The months with the least cloud cover are January and February (Cloud cover 24).
Average visibility in September
Siyu, 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).
