Butterfly in Spring
In spring (March, April and May), Butterfly sees average daytime highs around 26°C and overnight lows near 21°C, with 428 mm of rain over about 44 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs climb from about 21°C in early March to 29°C by late May. The sky is clear or mostly clear about 14% of the time across spring, and the air most often feels oppressive.
Spring is Butterfly's 3rd-best season to visit on our travel score. For the whole year in context, see Butterfly's year-round climate.
- Avg daytime high
- 26°C
- 3rd-warmest season
- Avg overnight low
- 21°C
- Rainfall
- 428 mm
- 44 wet days
- Avg wind
- 12 km/h
- Travel score
- 5.5
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Butterfly in Spring
Over the season highs climb from about 21°C in early March to 29°C by late May.
A typical spring day in Butterfly reaches about 26°C and drops to 21°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Butterfly
Once humidity and wind are folded in, spring brings about 19 days that feel above 32°C and 0 that feel at or below 0°C.
The story in spring is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Butterfly weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 19° / 13° | 32 | 5.5 | 10.8 | 6.9 |
| Feb | 20° / 15° | 43 | 7.8 | 11.2 | 6.4 |
| Mar | 22° / 17° | 75 | 11.4 | 11.8 | 6.3 |
| Apr | 26° / 21° | 125 | 13.8 | 12.5 | 5.8 |
| May | 29° / 24° | 229 | 19.1 | 13.1 | 4.4 |
| Jun | 30° / 26° | 319 | 22.9 | 13.3 | 3.2 |
| Jul | 31° / 27° | 243 | 22.1 | 13.2 | 3.1 |
| Aug | 31° / 27° | 313 | 23.6 | 12.8 | 3.1 |
| Sep | 30° / 26° | 199 | 16.6 | 12.1 | 4.1 |
| Oct | 28° / 23° | 61 | 6.7 | 11.5 | 6.7 |
| Nov | 25° / 19° | 34 | 4.9 | 10.9 | 7.9 |
| Dec | 21° / 15° | 31 | 4.2 | 10.7 | 7.5 |
Cloud cover in Spring
The sky is clear or mostly clear about 14% of the time across spring.
Chance of precipitation in Spring
Butterfly gets around 428 mm of rain over 44 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 12 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 30 min in early March to 13 h 18 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 4.5 kWh/m².
Hazard calendar for Butterfly
In spring, Butterfly overlaps its pacific typhoon and monsoon 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.
Is spring a good time to visit Butterfly?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Butterfly for sightseeing.
What to pack for Butterfly in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Butterfly sees daytime highs around 26°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 44 days see rain.
Sea temperature near Butterfly in Spring
The nearest coast averages about 23°C across spring — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 19 | 19 | 20 | 23 | 26 | 28 | 29 | 29 | 28 | 27 | 24 | 20 |
| Comfort | Cool | Cool | Cool | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Warm | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 19 | Cool |
| Feb | 19 | Cool |
| Mar | 20 | Cool |
| Apr | 23 | Refreshing |
| May | 26 | Warm |
| Jun | 28 | Warm |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 28 | Tropical |
| Oct | 27 | Warm |
| Nov | 24 | Refreshing |
| Dec | 20 | Refreshing |
UV index in Butterfly in Spring
Clear-sky midday UV across spring averages 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 6 | 8 | 9 | 9 | 10 | 12 | 12 | 11 | 10 | 8 | 7 | 6 |
| Level | High | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 8 | Very high |
| Mar | 9 | Very high |
| Apr | 9 | Very high |
| May | 10 | Very high |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 8 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Air quality in Butterfly in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 183 | 175 | 165 | 149 | 115 | 83 | 73 | 85 | 119 | 127 | 157 | 156 |
| Level | Very unhealthy | Very unhealthy | Very unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 183 | Very unhealthy |
| Feb | 175 | Very unhealthy |
| Mar | 165 | Very unhealthy |
| Apr | 149 | Unhealthy |
| May | 115 | Unhealthy |
| Jun | 83 | Unhealthy |
| Jul | 73 | Unhealthy |
| Aug | 85 | Unhealthy |
| Sep | 119 | Unhealthy |
| Oct | 127 | Unhealthy |
| Nov | 157 | Very unhealthy |
| Dec | 156 | Very unhealthy |
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.
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.
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
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.