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 snowfall in September
- Average snowfall 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 advent of September brings a slight shift in average high-temperature, moving from a hot 32.3°C (90.1°F) in August to a warm 27.5°C (81.5°F). September witnesses an average nighttime temperature of 20.1°C (68.2°F).Heat index
In September, the average heat index is calculated to be a hot 30°C (86°F). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.In terms of the heat index, values are set with light wind and shade conditions in mind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Humidity
The average relative humidity in September is 75%.Rainfall
In Yantan, during September, the rain falls for 19.7 days and regularly aggregates up to 62mm (2.44") of precipitation. In Yantan, China, during the entire year, the rain falls for 172.1 days and collects up to 637mm (25.08") of precipitation.Snowfall
In Yantan, snow does not fall in February through October and December.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 06:38 and sunset at 19:22. On the last day of the month, sunrise is at 06:53 and sunset at 18:47 CST.
Sunshine
In September, the average sunshine is 6.6h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 6 during September leads to these advisories:
Prevent overexposure. Protection from the sun's harmful effects is needed. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Yantan in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Yantan have in September?
How high is the UV index in September?
Average temperature in September
Yantan, China
- Average high temperature in September: 27.5°C
The warmest months (with the highest average high temperature) are July and August (32.3°C).
The month with the lowest average high temperature is January (12.3°C).
- Average low temperature in September: 20.1°C
The month with the highest average low temperature is August (23.6°C).
The coldest month (with the lowest average low temperature) is January (5.2°C).
Average pressure in September
Yantan, China
- Average pressure in September: 1011.6mbar
The month with the highest atmospheric pressure is December (1024.7mbar).
The month with the lowest atmospheric pressure is July (1002.1mbar).
Average wind speed in September
Yantan, China
- Average wind speed in September: 6.1km/h
The windiest month (with the highest average wind speed) is April (7.6km/h).
The calmest month (with the lowest average wind speed) is December (5.6km/h).
Average humidity in September
Yantan, China
- Average humidity in September: 75%
The month with the highest relative humidity is July (76%).
The month with the lowest relative humidity is March (53%).
Average rainfall in September
Yantan, China
- Average rainfall in September: 62mm
The wettest month (with the highest rainfall) is July (162mm).
The driest months (with the least rainfall) are January and February (4mm).
Average rainfall days in September
Yantan, China
- Average rainfall days in September: 19.7 days
The month with the highest number of rainy days is July (23.8 days).
The month with the least rainy days is February (4.5 days).
Average snowfall in September
Yantan, China
- Average snowfall in September: 0mm
The month with the highest snowfall is January (2mm).
The months with the least snowfall are February, March, April, May, June, July, August, September, October and December (0mm).
Average snowfall days in September
Yantan, China
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Yantan, China
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is February (Average sunshine: 8h and 24min).
The month with the least sunshine is October (Average sunshine: 6h and 18min).
Average sunshine days in September
Yantan, China
- Average sunshine days in September: 7.4 days
The month with the most sunshine days is January (24 days).
The month with the least sunshine days is July (6.1 days).
Average UV index in September
Yantan, China
- Average UV index in September: 6
The months with the highest UV index are April and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Yantan, China
- Average cloud cover in September: 53
The month with the most cloud cover is October (Cloud cover 55).
The month with the least cloud cover is February (Cloud cover 35).
Average visibility in September
Yantan, China
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, November and December (10km).
The months with the lowest visibility are June, July, August, September and October (9km).
