Lee On weather in May

In May, Lee On sees average daytime highs of 28°C and overnight lows near 24°C, with 229 mm of rain across 20 wet days and about 13.1 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 29°C by the end. The sky is clear or mostly clear about 13% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 48 min at the start of May to 13 h 18 min by month's end. Set against the rest of the year, May is Lee On's 11th-clearest and 10th-windiest month. For the whole year in context, see Lee On's year-round climate.

Daytime high
28°
5th warmest
Overnight low
24°
8th coldest
Rainfall
229 mm
20 wet days
Daylight
13 h 06 min
5:47 AM – 6:51 PM
Cloud cover
76%
11th clearest
Wind
11 km/h
10th windiest
Solar energy
4.81 kWh/m²
Travel score
4.5
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 27°C in the first days to 29°C by the end.

A typical May day in Lee On reaches about 28°C in the afternoon and slips back to 24°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 31°C. Set against its neighbours, May runs about 3°C warmer than April and about 2°C cooler than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12723
22723
32723
42723
52723
62724
72724
82824
92824
102824
112824
122824
132824
142824
152824
162824
172825
182825
192825
202925
212925
222925
232925
242925
252925
262925
272925
282925
292925
302925
312926

How May really feels in Lee On

Once humidity and wind are folded in, May averages 15 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
15
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Lee On weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 13°24410.86.8
Feb19° / 14°346.311.26.4
Mar21° / 17°6810.111.86.3
Apr25° / 21°12314.112.55.9
May28° / 24°2292013.14.5
Jun30° / 26°31423.813.33.2
Jul31° / 27°24322.913.23.1
Aug31° / 27°30823.912.83.1
Sep30° / 26°2031712.14.2
Oct27° / 23°646.911.57.0
Nov24° / 19°364.910.98.0
Dec20° / 15°293.910.77.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% 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 75%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13070
22971
32971
42971
52872
63070
73070
82971
93070
102971
112872
122773
132773
142674
152674
162674
172476
182476
192377
202377
212377
222179
232179
242179
252278
262278
272278
282278
292278
302278
312278

Chance of precipitation in May

Any precipitation

Lee On gets around 229 mm of rain over 20 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 64% and peaks near 69% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
158
259
359
459
560
660
760
860
961
1061
1162
1262
1363
1463
1564
1664
1765
1866
1966
2067
2168
2268
2368
2468
2568
2668
2768
2868
2968
3069
3169

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
128234521
228234522
318224524
417224425
517214427
616204429
716194331
816194332
915184234
1005174136
1105164138
1204164040
1304154041
1404143943
1503133944
1603133846
1703123747
1803123649
1903113551
2003113452
2103113353
2203103354
2302103256
2402103157
2502103058
260292960
270292861
280282763
290282664
300172567
310172468

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 48 min at the start of May to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over May. Sunrise moves from 5:56 AM to 5:43 AM, and sunset from 6:45 PM to 6:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:566:45
212.85:556:45
312.95:546:46
412.95:546:46
512.95:536:46
612.95:526:47
712.95:526:47
812.95:516:48
913.05:516:48
1013.05:506:49
1113.05:506:49
1213.05:496:50
1313.05:496:50
1413.05:486:51
1513.15:486:51
1613.15:476:51
1713.15:476:52
1813.15:466:52
1913.15:466:53
2013.15:456:53
2113.15:456:54
2213.25:456:54
2313.25:446:55
2413.25:446:55
2513.25:446:56
2613.25:446:56
2713.25:436:56
2813.25:436:57
2913.25:436:57
3013.35:436:58
3113.35:436:58

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.81 kWh/m².

For context, solar energy here swings from a low near 3.36 kWh/m² to a high of 5.41 kWh/m² in July across the year — May's 4.81 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.9Bright
124.9Bright
134.9Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in May

Hazard calendar for Lee On

In seasonPeak

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

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

Lee On's monsoon runs May–September, when most of the year's rain falls.

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

Is May a good time to visit Lee On?

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

4.5
Sightseeing
8th-best month of the year
5.1
Beach & pool
5th-best month of the year

May is a reasonable time to visit Lee On for sightseeing.

What to pack for Lee On in May

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

In May, Lee On sees daytime highs around 28°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

Sea temperature near Lee On in May

The nearest coast averages about 26°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in July at about 29°C and coldest in January near 20°C.

It's comfortable for a long swim from Feb 23 to Jan 5 — about 10.4 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan20Cool
Feb20Cool
Mar21Refreshing
Apr23Refreshing
May26Warm
Jun28Warm
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov24Refreshing
Dec21Refreshing

UV index in Lee On in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lee On peaks around July 13 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 13UV 12Jan 10UV 6
UV index (midday)Level
Jan6High
Feb8Very high
Mar9Very high
Apr9Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep10Very high
Oct8Very high
Nov7High
Dec6High

Air quality in Lee On 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 Lee On is worst in January — around 183 µg/m³ PM2.5 (very unhealthy), about 2.5× the cleanest month (July, 73 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090120150180210JanFebMarAprMayJunJulAugSepOctNovDecVery unhealthyUnhealthyVery unhealthyJan 21181 µg/m³Jul 1674 µg/m³
PM2.5 (µg/m³)Level
Jan183Very unhealthy
Feb175Very unhealthy
Mar165Very unhealthy
Apr149Unhealthy
May115Unhealthy
Jun83Unhealthy
Jul73Unhealthy
Aug85Unhealthy
Sep119Unhealthy
Oct127Unhealthy
Nov157Very unhealthy
Dec156Very unhealthy
Location & terrain

Where is Lee On?

Lee On sits at 22.4°N, 114.2°E, 6 m above sea level, in Hong Kong. The nearest listed city is Wu Kai Sha, 0.0 km away.

Tai Mei TukSai KungShuen WanSiu Lek Yuen

Topography around Lee On

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

Within 3 km, the terrain around Lee On has large variations in elevation — a maximum elevation change of 645 m around an average of 86 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 941 m; within 80 km, large variations in elevation — a maximum elevation change of 1,012 m.

The land around Lee On is covered by water (45%) and trees (41%) within 3 km, trees (55%) and water (30%) within 16 km, and water (56%) and trees (27%) within 80 km.

3 km
645 m
16 km
941 m
80 km
1,012 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Wu Kai Sha 0.0 km · Kam Ying 1.0 km · Ma On Shan 2.0 km · Tai Shui Hang 3.0 km · Tai Mei Tuk 5.0 km · Sai Kung 5.0 km · Shuen Wan 6.0 km · Siu Lek Yuen 6.0 km

Hong Kong travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G / M
220 V · 50 Hz
Prices
≈ 71% of US
price level, 2025
GDP per capita
$56,983
2025
Happiness
5.6 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.4
per 100k, 2023
Income group
High
World Bank
English
Moderate
EF EPI 538
Religion
other or none 54%Buddhist or Taoist 28%Protestant 7%Roman Catholic 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 Lee On (22.4263°, 114.2413°, elevation 6 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).