Climate in Dalian (Liaoning)

The climate of Dalian is continental, with cold, dry winters and warm to hot, rainy summers. The bulk of the rain falls from May to September, with a maximum in July and August. However, the rains are irregular from one year to another. Since the winter is dry, snowfalls are quite rare.
The city is located in the north-east of China, in the province of Liaoning, at almost 39 degrees north latitude, on the tip of the Liaodong Peninsula, which separates the Bohai Sea from the Korea Bay.
In winter, the mitigating effect of the sea is reduced because cold currents prevail, which come from the interior of China and Mongolia, and during cold spells the temperature can drop to -15 °C (5 °F) or even below. In the summer, on the other hand, the monsoon brings warm and humid currents of tropical origin. However, the climate here is slightly milder than in the inland areas and in Beijing, and it's cooler especially in spring, when the sea retains the cold after the winter.
The city is windy. In winter, and especially in spring (March to May), the city can be affected by the yellow dust coming from the deserts of Mongolia and of Central Asia, which forms a characteristic haze and brings breathing problems and eye irritation.
Fog can sometimes form, especially in spring and summer.
From July to early October (and occasionally also in the second half of June), Dalian can be affected by typhoons, the tropical cyclones of South-East Asia, although this area of China is less exposed than the south, moreover, typhoons generally arrive weakened at these latitudes.

Best Time

The best times to visit Dalian are spring and autumn, in order to avoid both the cold of winter and the heat and the rains of summer, and in particular, the month of May and from mid-September to mid-October.

Dalian - Climate data

The average temperature of the coldest month (January) is of -3.9 °C (25.0 °F), that of the warmest month (August) is of 25.3 °C (77.5 °F). Here are the average temperatures.
Precipitation amounts to 580 millimeters (22.8 inches) per year: so, it is at an intermediate level. It ranges from 7 mm (0.3 in) in the driest month (February) to 145 mm (5.7 in) in the wettest one (August). Here is the average precipitation.
The sea temperature ranges from 2.5 °C (36 °F) in February to 25 °C (77 °F) in August. Here are the average sea temperatures.
There are on average around 2740 sunshine hours per year. Here are the average hours of sunshine per day.

Dalian - Weather by month

Based on the period 1991-2020

---

January, the coldest month of the year, is generally a very cold month. The average temperature is of -3.9 °C (25 °F), with a minimum of -8 °C (17.6 °F) and a maximum of 0.2 °C (32.4 °F).
On the coldest nights of the month, the temperature usually drops to around -14 °C (7 °F). However, it dropped to -20 °C (-4 °F) in January 2001.
On the warmest days of the month, the temperature usually reaches around 8 °C (46.5 °F). However, it reached 13 °C (55.4 °F) in January 2002.
Precipitation amounts to only 8 mm (0.3 in), distributed over 3 days.
The day lasts on average 9 hours and 50 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 65% of the time.
The average humidity is 60%.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 4 °C (39 °F). Therefore, the sea is very cold for swimming.

---

February is generally a very cold month. The average temperature is of -1.2 °C (30 °F), with a minimum of -5.4 °C (22.3 °F) and a maximum of 3 °C (37.3 °F).
On the coldest nights of the month, the temperature usually drops to around -12 °C (10.5 °F). However, it dropped to -17 °C (1.4 °F) in February 2006.
On the warmest days of the month, the temperature usually reaches around 10.5 °C (51.5 °F). However, it reached 17 °C (62.6 °F) in February 1992.
Precipitation amounts to only 7 mm (0.3 in), distributed over 3 days.
The day lasts on average 10 hours and 50 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 66% of the time.
The average humidity is 57%.
The average wind speed is 14 kph (9 mph).
The average sea temperature is of 2.5 °C (36.5 °F). Therefore, the sea is very cold for swimming.

---

March is generally a quite cold month. The average temperature is of 4.4 °C (40 °F), with a minimum of 0 °C (32 °F) and a maximum of 8.9 °C (48 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -6 °C (21 °F). However, it dropped to -9 °C (15.8 °F) in March 2005.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 18.5 °C (65.5 °F). However, it reached 24 °C (75.2 °F) in March 2002.
Precipitation amounts to 14 mm (0.6 in), distributed over 4 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 51%.
The average wind speed is 15 kph (9 mph).
The average sea temperature is of 3.5 °C (38.5 °F). Therefore, the sea is very cold for swimming.

---

April is generally a mild month. The average temperature is of 11.3 °C (52 °F), with a minimum of 6.5 °C (43.7 °F) and a maximum of 16.1 °C (61 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 1 °C (34 °F). However, it dropped to -1.6 °C (29.1 °F) in April 2000.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 25 °C (77 °F). However, it reached 30 °C (86 °F) in April 2004.
Precipitation amounts to 30 mm (1.2 in), distributed over 5 days.
The day lasts on average 13 hours and 20 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 53%.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 6.5 °C (44 °F). Therefore, the sea is very cold for swimming.

---

May is generally a very mild month. The average temperature is of 17.3 °C (63 °F), with a minimum of 12.4 °C (54.3 °F) and a maximum of 22.2 °C (72 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 7.5 °C (45.5 °F). However, it dropped to 1.4 °C (34.5 °F) in May 1991.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 29.5 °C (85.5 °F). However, it reached 35 °C (95 °F) in May 2019.
Precipitation amounts to 50 mm (2 in), distributed over 7 days.
The day lasts on average 14 hours and 20 minutes. So the days are long.
There are on average 9 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 57%.
The average wind speed is 15 kph (9 mph).
The average sea temperature is of 12 °C (53.5 °F). Therefore, the sea is very cold for swimming.

---

June is generally a warm month. The average temperature is of 21.7 °C (71 °F), with a minimum of 17.4 °C (63.2 °F) and a maximum of 26.1 °C (78.9 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 13.5 °C (56 °F). However, it dropped to 10.5 °C (50.9 °F) in June 1992.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 32 °C (90 °F). However, it reached 37 °C (98.6 °F) in June 2009.
Precipitation amounts to 75 mm (3 in), distributed over 9 days.
The day lasts on average 14 hours and 55 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 8.5 hours of sunshine per day. So, the sun shines 57% of the time.
The average humidity is 70%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 18.5 °C (65.5 °F). Therefore, the sea is very cool for swimming.

---

July is generally a warm to hot, muggy month. The average temperature is of 24.9 °C (77 °F), with a minimum of 21.3 °C (70.3 °F) and a maximum of 28.6 °C (83.4 °F).
On the coldest nights of the month, the temperature usually drops to around 18.5 °C (65 °F). However, it dropped to 16.9 °C (62.4 °F) in July 1995.
On the warmest days of the month, the temperature usually reaches around 34 °C (93 °F). However, it reached 37 °C (98.6 °F) in July 1999.
Precipitation amounts to 130 mm (5.1 in), distributed over 12 days.
The day lasts on average 14 hours and 35 minutes. So the days are long.
There are on average 7 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).
The average sea temperature is of 23 °C (73.5 °F). Therefore, the sea can be considered barely acceptable for swimming.

---

August, the hottest month of the year, is generally a warm to hot, muggy month. The average temperature is of 25.3 °C (78 °F), with a minimum of 21.7 °C (71 °F) and a maximum of 28.9 °C (84.1 °F).
On the coldest nights of the month, the temperature usually drops to around 17.5 °C (64 °F). However, it dropped to 13 °C (55.4 °F) in August 2009.
On the warmest days of the month, the temperature usually reaches around 33 °C (91.5 °F). However, it reached 38 °C (100.4 °F) in August 2018.
Precipitation amounts to 145 mm (5.7 in), distributed over 9 days.
The day lasts on average 13 hours and 35 minutes.
There are on average 8 hours of sunshine per day. So, the sun shines 57% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 25 °C (77 °F). Therefore, the sea is warm enough for swimming.

---

September is generally a warm month. The average temperature is of 21.0 °C (70 °F), with a minimum of 16.7 °C (62.1 °F) and a maximum of 25.4 °C (77.6 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 10.5 °C (51 °F). However, it dropped to 7 °C (44.6 °F) in September 2011.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 30.5 °C (86.5 °F). However, it reached 34 °C (93.2 °F) in September 1999.
Precipitation amounts to 60 mm (2.4 in), distributed over 6 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 68% of the time.
The average humidity is 67%.
The average wind speed is 12 kph (7 mph).
The average sea temperature is of 23 °C (73 °F). Therefore, the sea can be considered barely acceptable for swimming.

---

October is generally a mild month. The average temperature is of 13.8 °C (57 °F), with a minimum of 9.2 °C (48.5 °F) and a maximum of 18.4 °C (65.2 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 1 °C (33.5 °F). However, it dropped to -4 °C (24.8 °F) in October 1997.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 25.5 °C (77.5 °F). However, it reached 28 °C (82.4 °F) in October 1995.
Precipitation amounts to 35 mm (1.4 in), distributed over 5 days.
The day lasts on average 11 hours and 5 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 68% of the time.
The average humidity is 61%.
The average wind speed is 13 kph (8 mph).
The average sea temperature is of 18.5 °C (65.5 °F). Therefore, the sea is very cool for swimming.

---

November is generally a quite cold month. The average temperature is of 5.5 °C (42 °F), with a minimum of 1 °C (33.8 °F) and a maximum of 10 °C (50 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -6.5 °C (20.5 °F). However, it dropped to -11 °C (12.2 °F) in November 1992.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 19 °C (66 °F). However, it reached 22 °C (71.6 °F) in November 1995.
Precipitation amounts to 20 mm (0.8 in), distributed over 5 days.
The day lasts on average 10 hours and 0 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 61% of the time.
The average humidity is 61%.
The average wind speed is 14 kph (9 mph).
The average sea temperature is of 13.5 °C (56 °F). Therefore, the sea is very cold for swimming.

---

December is generally a very cold month. The average temperature is of -1.1 °C (30 °F), with a minimum of -5.4 °C (22.3 °F) and a maximum of 3.1 °C (37.6 °F).
On the coldest nights of the month, the temperature usually drops to around -11.5 °C (11 °F). However, it dropped to -15 °C (5 °F) in December 2009.
On the warmest days of the month, the temperature usually reaches around 10.5 °C (50.5 °F). However, it reached 14 °C (57.2 °F) in December 1991.
Precipitation amounts to only 8 mm (0.3 in), distributed over 3 days.
The day lasts on average 9 hours and 30 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 6 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 61%.
The average wind speed is 14 kph (9 mph).
The average sea temperature is of 8 °C (47 °F). Therefore, the sea is very cold for swimming.