Lang Suan in Spring

In spring (March, April and May), Lang Suan sees average daytime highs around 33°C and overnight lows near 24°C, with 412 mm of rain over about 52 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.

Across spring, daytime highs hold fairly steady around 33°C. The sky is clear or mostly clear about 24% of the time across spring, and the air most often feels oppressive.

Spring is Lang Suan's 3rd-best season to visit on our travel score. For the whole year in context, see Lang Suan's year-round climate.

Avg daytime high: 33°C; warmest season of the year
Avg overnight low: 24°C
Rainfall: 412 mm; 52 wet days
Avg wind: 7 km/h
Travel score: 3.1; 3rd-best season
Months: Mar · Apr · May

← Winter Lang Suan year-round climate Summer →

Spring Summer Fall Winter

Temperature in Lang Suan in Spring

Average highAverage lowShaded bands: 10–90% of days

Across spring, daytime highs hold fairly steady around 33°C.

A typical spring day in Lang Suan reaches about 33°C and drops to 24°C overnight. The warmest of the three months is April, the coolest March.

How spring really feels in Lang Suan

Once humidity and wind are folded in, spring brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.

Days feeling ≥ 32°C

52 feel dangerously hot (≥ 39°C)

Days feeling ≤ 0°C

wind chill below the day's low

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

Lang Suan 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	29° / 22°	68	10.4	11.5	5.3
Feb	31° / 22°	38	7.8	11.7	5.0
Mar	32° / 23°	93	11.5	11.9	3.9
Apr	33° / 24°	118	16.1	12.2	2.9
May	32° / 25°	201	24.3	12.4	2.4
Jun	31° / 25°	188	21.7	12.6	2.9
Jul	31° / 24°	206	23.3	12.5	3.0
Aug	31° / 24°	225	24.7	12.3	2.9
Sep	30° / 24°	302	26.6	12.1	2.8
Oct	30° / 23°	326	27.4	11.8	2.9
Nov	29° / 23°	214	21.9	11.5	3.7
Dec	29° / 22°	103	13.8	11.4	5.0

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time across spring.

Chance of precipitation in Spring

Any precipitation

Lang Suan gets around 412 mm of rain over 52 wet days across spring. The line is the day-by-day chance of measurable precipitation.

Humidity in Spring

DryComfortableHumidMuggyOppressiveMiserable

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 7 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 48 min in early March to 12 h 30 min by late May. The lit band spans sunrise to sunset each day.

Solar energy in Spring

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across spring, about 6.0 kWh/m².

Planning a trip in spring

Hazard calendar for Lang Suan

In seasonPeak

In spring, Lang Suan overlaps its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.

Lang Suan sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

Lang Suan's rainy season runs May–November, when most of the year's rain falls.

Cyclone

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is spring a good time to visit Lang Suan?

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.

3.1

Sightseeing

3rd-best month of the year

5.2

Beach & pool

2nd-best month of the year

spring is a weaker month for outdoor sightseeing in Lang Suan.

What to pack for Lang Suan in Spring

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

In spring, Lang Suan sees daytime highs around 33°C and nights near 24°C. Pack light clothes, rain gear and sun protection. About 52 days see rain.

light clothesrain gearsun protection

Sea temperature near Lang Suan in Spring

The nearest coast averages about 30°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 33 km away) is warmest in May at about 30°C and coldest in January near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	28	28	29	30	30	30	29	29	29	29	29	28
Comfort	Warm	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Warm

	Sea temperature (°C)	Comfort
Jan	28	Warm
Feb	28	Tropical
Mar	29	Tropical
Apr	30	Tropical
May	30	Tropical
Jun	30	Tropical
Jul	29	Tropical
Aug	29	Tropical
Sep	29	Tropical
Oct	29	Tropical
Nov	29	Tropical
Dec	28	Warm

UV index in Lang Suan in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lang Suan peaks around August 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 9 (very 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)	10	12	13	13	12	12	12	14	13	11	10	9
Level	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	10	Very high
Feb	12	Extreme
Mar	13	Extreme
Apr	13	Extreme
May	12	Extreme
Jun	12	Extreme
Jul	12	Extreme
Aug	14	Extreme
Sep	13	Extreme
Oct	11	Extreme
Nov	10	Very high
Dec	9	Very high

Air quality in Lang Suan in Spring

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Lang Suan is worst in January — around 19 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	19	18	18	18	15	14	15	13	13	13	13	14
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	19	Moderate
Feb	18	Moderate
Mar	18	Moderate
Apr	18	Moderate
May	15	Moderate
Jun	14	Moderate
Jul	15	Moderate
Aug	13	Moderate
Sep	13	Moderate
Oct	13	Moderate
Nov	13	Moderate
Dec	14	Moderate

Location & terrain

Where is Lang Suan?

Lang Suan sits at 9.9°N, 99.1°E, 11 m above sea level, in Thailand. The nearest listed city is Ranong, 49 km away.

Topography around Lang Suan

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

Within 3 km, the terrain around Lang Suan has only modest variations in elevation — a maximum elevation change of 131 m around an average of 13 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 780 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,296 m.

The land around Lang Suan is covered by trees (78%) within 3 km, trees (74%) within 16 km, and trees (50%) and water (47%) within 80 km.

3 km

131 m

trees 78%

16 km

780 m

trees 74%

80 km

1,296 m

trees 50%

treesgrasslandcroplandartificial surfacesbare terrainwatermangroves

← Winter Lang Suan year-round climate Summer →

Spring weather nearby: Ranong 49 km · Kawthaung 58 km · Chumphon 62 km · Ko Tao 85 km · Surat Thani 94 km · Tha Kham 94 km · Ko Samui 104 km · Ko Pha-ngan 106 km

Thailand travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type A / B / C; 230 V · 50 Hz
Prices: ≈ 31% of US; price level, 2025
GDP per capita: $8,057; 2025
Happiness: 6.3 / 10; World Happiness, 2025
Homicide rate: 4.8; per 100k, 2011
Road deaths: 32.2; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Very low; EF EPI 402
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 Lang Suan (9.9456°, 99.0785°, elevation 11 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.