September weather forecastChangchun, China
September
Weather in September
September exhibits a shift towards autumn as Changchun bids farewell to the intense heat of summer. The weather transitions from the sweltering summer towards a milder, more temperate climate. Temperatures cool down gradually, and rainfall amounts decrease to 52mm (2.05"), heralding the departure of the monsoons. Relative humidity dips to 69%, making this month less damp than its rainy predecessors. These changes in climatic conditions mark the beginning of the cherished crispness of the fall season.Temperature
Transition from August to September is accompanied by a temperature drop, with average high-temperatures decreasing from a warm 26.4°C (79.5°F) to a pleasant 21.3°C (70.3°F). Changchun's average low-temperature during September nights is observed to be a cool 10.1°C (50.2°F).Humidity
In Changchun, the average relative humidity in September is 69%.Rainfall
In Changchun, in September, during 8.8 rainfall days, 52mm (2.05") of precipitation is typically accumulated. In Changchun, during the entire year, the rain falls for 98.7 days and collects up to 570mm (22.44") of precipitation.Daylight
The average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 05:02 and sunset at 18:14. On the last day of September, sunrise is at 05:35 and sunset at 17:21 CST.
Sunshine
The average sunshine in September is 7.8h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, a daily UV index of 5 turns into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Changchun, China
- Average high temperature in September: 21.3°C
The warmest month (with the highest average high temperature) is July (27.6°C).
The month with the lowest average high temperature is January (-9.8°C).
- Average low temperature in September: 10.1°C
The month with the highest average low temperature is July (19°C).
The coldest month (with the lowest average low temperature) is January (-19.9°C).
Average humidity in September
Changchun, China
- Average humidity in September: 69%
The month with the highest relative humidity is August (79%).
The month with the lowest relative humidity is April (49%).
Average rainfall in September
Changchun, China
- Average rainfall in September: 51.9mm
The wettest month (with the highest rainfall) is July (161.1mm).
The driest month (with the least rainfall) is January (3.2mm).
Average rainfall days in September
Changchun, China
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is July (15.4 days).
The month with the least rainy days is January (3.7 days).
Average daylight in September /
Average sunshine in September
Changchun, China
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 7h and 48min
The month with the most sunshine is May (Average sunshine: 8h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average UV index in September
Changchun, China
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 8).
The months with the lowest UV index are January, November and December (UV index 1).
