Butterfly weather in April

In April, Butterfly sees average daytime highs of 26°C and overnight lows near 21°C, with 125 mm of rain across 13.8 wet days and about 12.5 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 27°C by the end. The sky is clear or mostly clear about 13% of the time in April, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of April to 12 h 48 min by month's end. Set against the rest of the year, April is Butterfly's 8th-clearest and 7th-windiest month. For the whole year in context, see Butterfly's year-round climate.

Daytime high
26°
7th warmest
Overnight low
21°
6th coldest
Rainfall
125 mm
13.8 wet days
Daylight
12 h 30 min
6:09 AM – 6:40 PM
Cloud cover
72%
8th clearest
Wind
12 km/h
7th windiest
Solar energy
4.64 kWh/m²
Travel score
5.8
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 27°C by the end.

A typical April day in Butterfly reaches about 26°C in the afternoon and slips back to 21°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, April runs about 3°C warmer than March and about 3°C cooler than May.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12419
22419
32419
42420
52420
62420
72520
82520
92520
102520
112520
122520
132521
142621
152621
162621
172621
182621
192621
202622
212622
222722
232722
242722
252722
262722
272722
282723
292723
302723

How April really feels in Butterfly

Once humidity and wind are folded in, April 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

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

Butterfly weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 13°325.510.86.9
Feb20° / 15°437.811.26.4
Mar22° / 17°7511.411.86.3
Apr26° / 21°12513.812.55.8
May29° / 24°22919.113.14.4
Jun30° / 26°31922.913.33.2
Jul31° / 27°24322.113.23.1
Aug31° / 27°31323.612.83.1
Sep30° / 26°19916.612.14.1
Oct28° / 23°616.711.56.7
Nov25° / 19°344.910.97.9
Dec21° / 15°314.210.77.5

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 18% of April, with mostly cloudy or overcast conditions the remaining 70%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13070
22971
32971
42971
53070
63070
73070
83169
93169
103070
113169
123169
133268
143268
153268
163268
173268
183268
193268
203268
213169
223169
233070
243070
253169
263070
272971
282971
292971
302971

Chance of precipitation in April

Any precipitation

Butterfly gets around 125 mm of rain over 13.8 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 47% and peaks near 55% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
142
242
342
443
543
643
743
843
943
1044
1144
1244
1345
1445
1545
1646
1746
1846
1947
2047
2148
2249
2349
2450
2551
2652
2753
2853
2954
3055

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the oppressive band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 71% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
110132535160
210132535170
39132435190
48132435200
58132335220
67132235230
77122234250
86122134260
96122033280
106121933301
115121832321
125111732341
135111731361
144101630381
154101530402
16491429412
17391428433
18381328443
19381328454
20371327464
21261227475
22261226486
23251126496
24151125517
25141125518
26141024529
271410245110
281410235012
290310235113
300310234915

Wind in April

Winds average 12 km/h in April.

Across April, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in April

DaylightNight

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

Days grow by about 36 minutes over April. Sunrise moves from 6:23 AM to 5:58 AM, and sunset from 6:35 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:236:35
212.26:226:35
312.26:216:35
412.36:206:36
512.36:196:36
612.36:186:36
712.36:176:37
812.36:166:37
912.46:156:37
1012.46:146:38
1112.46:136:38
1212.46:126:38
1312.56:126:39
1412.56:116:39
1512.56:106:39
1612.56:096:40
1712.56:086:40
1812.66:076:41
1912.66:066:41
2012.66:056:41
2112.66:056:42
2212.66:046:42
2312.76:036:43
2412.76:026:43
2512.76:016:43
2612.76:016:44
2712.76:006:44
2812.85:596:45
2912.85:586:45
3012.85:586:45

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.64 kWh/m².

For context, solar energy here swings from a low near 3.38 kWh/m² to a high of 5.5 kWh/m² in July across the year — April's 4.64 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.4Bright
64.4Bright
74.4Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.6Bright
134.6Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in April

Hazard calendar for Butterfly

In seasonPeak

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

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

Butterfly'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 April a good time to visit Butterfly?

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

5.8
Sightseeing
7th-best month of the year
5.5
Beach & pool
4th-best month of the year

April is a reasonable time to visit Butterfly for sightseeing.

What to pack for Butterfly in April

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

In April, Butterfly sees daytime highs around 26°C and nights near 21°C. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.

rain gearlight clothessun protection

Sea temperature near Butterfly in April

The nearest coast averages about 23°C in April — 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 29°C and coldest in February near 19°C.

It's comfortable for a long swim from Mar 18 to Dec 18 — about 9.1 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb19Cool
Mar20Cool
Apr23Refreshing
May26Warm
Jun28Warm
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov24Refreshing
Dec20Refreshing

UV index in Butterfly in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Butterfly peaks around July 13 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 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 11UV 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 Butterfly in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Butterfly 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 Butterfly?

Butterfly sits at 22.4°N, 114.0°E, 8 m above sea level, in Hong Kong. The nearest listed city is Sam Shing, 2.0 km away.

Ha TsuenPing ShanSham TsengShap Pat HeungYuen Long San Hui

Topography around Butterfly

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

Within 3 km, the terrain around Butterfly has significant variations in elevation — a maximum elevation change of 554 m around an average of 73 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 917 m; within 80 km, large variations in elevation — a maximum elevation change of 1,020 m.

The land around Butterfly is covered by water (39%) and trees (30%) within 3 km, water (51%) and trees (30%) within 16 km, and water (57%) and trees (22%) within 80 km.

3 km
554 m
16 km
917 m
80 km
1,020 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
April weather nearby: Sam Shing 2.0 km · Tuen Mun 2.0 km · Tuen Mun San Hui 3.0 km · Ha Tsuen 8.0 km · Ping Shan 9.0 km · Sham Tseng 9.0 km · Shap Pat Heung 9.0 km · Yuen Long San Hui 10 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 Butterfly (22.3759°, 113.9625°, elevation 8 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).