Dalian weather in May

In May, Dalian sees average daytime highs of 15°C and overnight lows near 13°C, with 59 mm of rain across 6 wet days and about 14.1 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 18°C by the end. The sky is clear or mostly clear about 46% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of May to 14 h 30 min by month's end. Set against the rest of the year, May is Dalian's 7th-clearest and 8th-windiest month. For the whole year in context, see Dalian's year-round climate.

Daytime high
15°
6th warmest
Overnight low
13°
7th coldest
Rainfall
59 mm
6 wet days
Daylight
14 h 06 min
4:46 AM – 6:53 PM
Cloud cover
47%
7th clearest
Wind
19 km/h
8th windiest
Solar energy
6.17 kWh/m²
Travel score
5.3
out of 10

Dalian is city in Liaoning, China.

Air quality
Very high
PM2.5 35.1 µg/m³ · 2018
Density
361/km²
people per km²
Founded
1904

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 13°C in the first days to 18°C by the end.

A typical May day in Dalian reaches about 15°C in the afternoon and slips back to 13°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 18°C. Set against its neighbours, May runs about 6°C warmer than April and about 5°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11310
21310
31310
41311
51311
61311
71411
81411
91412
101412
111412
121512
131512
141512
151513
161513
171613
181613
191614
201614
211614
221714
231714
241715
251715
261715
271815
281815
291815
301816
311816

How May really feels in Dalian

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Dalian weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°71.929.60.0
Feb / -2°102110.50.0
Mar / 153.10.711.70.2
Apr10° / 365.40.1132.5
May15° / 13°596014.15.3
Jun21° / 19°806.8014.77.0
Jul25° / 23°1369.5014.47.0
Aug26° / 24°1408.7013.57.1
Sep23° / 20°515.3012.37.8
Oct17° / 14°335.60116.2
Nov10° / 284.70.89.92.5
Dec / -0°123.22.19.30.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26238
36238
46139
56040
65941
75842
85842
95842
105743
115743
125842
135842
145743
155842
165842
175941
185941
196040
206040
216139
226139
236139
246139
256139
266139
276139
286040
296040
306040
316040

Chance of precipitation in May

Any precipitation

Dalian gets around 59 mm of rain over 6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 20% and peaks near 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
123
223
323
423
523
623
723
823
923
1023
1122
1222
1322
1421
1520
1620
1719
1818
1918
2017
2117
2217
2316
2416
2516
2617
2717
2817
2918
3018
3118

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 84% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
110000
210000
310000
410000
510000
610000
79910
89910
99910
109820
119820
129730
139640
149550
159460
169280
179190
1889110
1986140
2084160
2180191
2278211
2375241
2471272
2567312
2663343
2759374
2855405
2950437
30454510
31404712

Wind in May

Winds average 19 km/h in May.

Across May, daily wind ranges from about 17 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
120breezy
220breezy
320light breeze
420light breeze
520light breeze
620light breeze
720light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 min at the start of May to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over May. Sunrise moves from 5:03 AM to 4:36 AM, and sunset from 6:39 PM to 7:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:036:39
213.65:016:40
313.75:006:41
413.74:596:42
513.84:586:43
613.84:576:44
713.84:556:45
813.94:546:46
913.94:536:47
1013.94:526:48
1114.04:516:49
1214.04:506:50
1314.04:496:51
1414.14:486:52
1514.14:476:52
1614.14:466:53
1714.14:456:54
1814.24:456:55
1914.24:446:56
2014.24:436:57
2114.34:426:58
2214.34:416:59
2314.34:417:00
2414.34:407:00
2514.44:397:01
2614.44:397:02
2714.44:387:03
2814.44:387:04
2914.54:377:04
3014.54:367:05
3114.54:367:06

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.17 kWh/m².

For context, solar energy here swings from a low near 2.15 kWh/m² to a high of 6.22 kWh/m² in June across the year — May's 6.17 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
96.0Bright
106.0Bright
116.0Intense
126.0Intense
136.0Intense
146.1Intense
156.1Intense
166.1Intense
176.2Intense
186.2Intense
196.2Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
316.4Intense
Planning a trip in May

Hazard calendar for Dalian

In seasonPeak

In May, Dalian sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Dalian sits in the Pacific typhoon belt; the season peaks July–October.

Dalian's rainy season runs June–August, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Dalian?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.3
Sightseeing
6th-best month of the year
0.7
Beach & pool
6th-best month of the year

May is a reasonable time to visit Dalian for sightseeing.

What to pack for Dalian in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Dalian sees daytime highs around 15°C and nights near 13°C. Pack sun protection. Worth having: a warm layer. About 6 days see rain.

sun protectiona warm layer

Sea temperature near Dalian in May

The nearest coast averages about 12°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 24°C and coldest in February near 3°C.

It's comfortable for a long swim from Jul 5 to Oct 4 — about 3 months when the water holds above 20°C.

0°10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan5Bracing
Feb3Bracing
Mar4Bracing
Apr7Bracing
May12Bracing
Jun17Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct19Cool
Nov14Bracing
Dec9Bracing

UV index in Dalian in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Dalian peaks around August 18 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 21 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowAug 18UV 7Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr5High
May6High
Jun6High
Jul7High
Aug7Very high
Sep7High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Dalian in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Dalian is worst in March — around 52 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (September, 24 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Dalian's WHO annual average of 35.1 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMar 2151 µg/m³Sep 1224 µg/m³
PM2.5 (µg/m³)Level
Jan36Poor
Feb41Poor
Mar52Poor
Apr49Poor
May41Poor
Jun33Moderate
Jul30Moderate
Aug25Moderate
Sep24Moderate
Oct29Moderate
Nov32Moderate
Dec30Moderate
Location & terrain

Where is Dalian?

Dalian sits at 38.9°N, 121.6°E, 33 m above sea level, in China. The nearest listed city is Sinŭiju, 274 km away.

Kwail-ŭpChangyŏnSonghwaŬllyulChaeryŏng-niChŏngju

Topography around Dalian

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Dalian.

Within 3 km, the terrain around Dalian has only modest variations in elevation — a maximum elevation change of 218 m around an average of 35 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 442 m; within 80 km, large variations in elevation — a maximum elevation change of 677 m.

The land around Dalian is covered by artificial surfaces (77%) within 3 km, water (45%), artificial surfaces (27%) and trees (22%) within 16 km, and water (71%) within 80 km.

3 km
218 m
16 km
442 m
80 km
677 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Sinŭiju 274 km · Uiju 289 km · Kwail-ŭp 301 km · Changyŏn 312 km · Songhwa 313 km · Ŭllyul 314 km · Chaeryŏng-ni 315 km · Chŏngju 322 km

China travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / I
220 V · 50 Hz
Prices
≈ 47% of US
price level, 2025
GDP per capita
$13,862
2025
Happiness
6.1 / 10
World Happiness, 2025
Homicide rate
0.5
per 100k, 2020
Road deaths
17.4
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 464
Religion
unaffiliated 52%folk religion 22%Buddhist 18%Christian 5%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Dalian (38.9122°, 121.6022°, elevation 33 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).