September weather forecastDalian, China

September

Weather in September

As September dawns, Dalian experiences a slight cooling trend hinting at the onset of autumn. The change of season brings about a welcoming drop in temperatures as well as in humidity levels. Remnants of the monsoon season are still evident with considerable rainfall recorded in this month. Nevertheless, ample sunshine and reduced heat result in a balanced climate. It's an ideal time to explore the colorful transformation of Dalian's natural landscape.

Temperature

The shift from August to September in Dalian, China, coincides with a small decrease in the average high-temperature, down to a still moderately hot 23.9°C (75°F) from a warm 27.3°C (81.1°F). The low-temperature average for Dalian during September stands at a refreshing 17.4°C (63.3°F).

Humidity

The average relative humidity in September in Dalian is 69%.

Rainfall

In Dalian, in September, it is raining for 6 days, with typically 65mm (2.56") of accumulated precipitation. Throughout the year, in Dalian, there are 72.5 rainfall days, and 602mm (23.7") of precipitation is accumulated.

Sea temperature

In Dalian, in September, the average water temperature is 21.9°C (71.4°F).
Note: Swimming in 21.9°C (71.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

The average length of the day in September is 12h and 27min.
On the first day of September, sunrise is at 05:22 and sunset at 18:24. On the last day of the month, sunrise is at 05:48 and sunset at 17:38 CST.

Sunshine

The average sunshine in September is 8.4h.

UV index

In September, the average daily maximum UV index in Dalian, China, is 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be wary! Reflections from sand and water make UV radiation more intense.

Updated: Jan 24, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The average high-temperature, in September, in Dalian, is 23.9°C (75°F), while the average low-temperature is 17.4°C (63.3°F). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 31°C (87.8°F).

In Dalian, the average relative humidity in September is 69%.

In Dalian, China, during September, the rain falls for 6 days and regularly aggregates up to 65mm (2.56") of precipitation.

In September, the average sea temperature in Dalian is 21.9°C (71.4°F). For most, swimming in 21.9°C (71.4°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

In September, the average day length in Dalian, China, is 12h and 27min.

On the first day of September in Dalian, sunrise is at 05:22 and sunset at 18:24. On the last day of the month, sunrise is at 05:48 and sunset at 17:38 CST.

In Dalian, China, the average sunshine duration in September is 8.4h.

In Dalian, the average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

27.3°C

23.9°C

17.5°C

Average low temperature

Average humidity

Average rainfall

Average rainfall days

9.2

5.2

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in September
Dalian, China

Average high temperature in September: 23.9°C

The warmest month (with the highest average high temperature) is August (27.3°C).
The month with the lowest average high temperature is January (-0.4°C).

Average low temperature in September: 17.4°C

The month with the highest average low temperature is August (21.6°C).
The coldest month (with the lowest average low temperature) is January (-6.8°C).

Average humidity in September
Dalian, China

Average humidity in September: 69%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is March (55%).

Average rainfall in September
Dalian, China

Average rainfall in September: 65.1mm

The wettest month (with the highest rainfall) is August (155.4mm).
The driest month (with the least rainfall) is February (5.8mm).

Average rainfall days in September
Dalian, China

Average rainfall days in September: 6 days

The month with the highest number of rainy days is July (11.8 days).
The month with the least rainy days is February (2.9 days).

Average sea temperature in September
Dalian, China

Average sea temperature in September: 21.9°C

The best month for swimming (with the highest average sea temperature) is August (23.6°C).
The coldest month (with the lowest average sea temperature) is February (2.8°C).

Average daylight in September /
Average sunshine in September
Dalian, China

Average daylight in September: 12h and 30min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

Average sunshine in September: 8h and 24min

The month with the most sunshine is May (Average sunshine: 9h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).