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 decrease of average high-temperatures is mild in September, with a decline from a warm 27.2°C (81°F) in August to an agreeable 21.5°C (70.7°F). The average temperature during September nights dips to a refreshing 13.8°C (56.8°F).Humidity
September is the most humid month, with an average relative humidity of 57%.Rainfall
In Yanchang, China, during September, the rain falls for 11.8 days and regularly aggregates up to 46mm (1.81") of precipitation. Throughout the year, there are 84.5 rainfall days, and 299mm (11.77") of precipitation is accumulated.Snowfall
In Yanchang, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 06:11 and sunset at 19:08. On the last day of September, sunrise is at 06:34 and sunset at 18:25 CST.
Sunshine
In Yanchang, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the most humid month?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Yanchang have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Yanchang have in September?
What is the UV index intensity in September?
Average temperature in September
Yanchang, China
- Average high temperature in September: 21.5°C
The warmest month (with the highest average high temperature) is July (29.3°C).
The month with the lowest average high temperature is January (-0.7°C).
- Average low temperature in September: 13.8°C
The month with the highest average low temperature is July (20.3°C).
The coldest month (with the lowest average low temperature) is January (-8.3°C).
Average pressure in September
Yanchang, China
- Average pressure in September: 1014.9mbar
The month with the highest atmospheric pressure is December (1029.5mbar).
The month with the lowest atmospheric pressure is July (1004.6mbar).
Average wind speed in September
Yanchang, China
- Average wind speed in September: 10.8km/h
The windiest month (with the highest average wind speed) is April (14.9km/h).
The calmest month (with the lowest average wind speed) is January (9.8km/h).
Average humidity in September
Yanchang, China
- Average humidity in September: 57%
The month with the highest relative humidity is September (57%).
The months with the lowest relative humidity are March and April (36%).
Average rainfall in September
Yanchang, China
- Average rainfall in September: 46mm
The wettest month (with the highest rainfall) is August (70mm).
The driest month (with the least rainfall) is December (2mm).
Average rainfall days in September
Yanchang, China
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is January (1.3 days).
Average snowfall in September
Yanchang, China
- Average snowfall in September: 0mm
The month with the highest snowfall is January (32mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Yanchang, China
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Yanchang, China
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is November (Average sunshine: 6h and 36min).
Average sunshine days in September
Yanchang, China
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is December (28.6 days).
The month with the least sunshine days is July (16 days).
Average UV index in September
Yanchang, China
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Yanchang, China
- Average cloud cover in September: 30
The month with the most cloud cover is September (Cloud cover 30).
The month with the least cloud cover is December (Cloud cover 17).
Average visibility in September
Yanchang, China
- 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).
