Chiang Rai in Spring

In spring (March, April and May), Chiang Rai sees average daytime highs around 33°C and overnight lows near 21°C, with 467 mm of rain over about 40 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 49% of the time across spring, and the air most often feels oppressive.

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

Avg daytime high: 33°C; warmest season of the year
Avg overnight low: 21°C
Rainfall: 467 mm; 40 wet days
Avg wind: 5 km/h
Travel score: 3.3; 3rd-best season
Months: Mar · Apr · May

← Winter Chiang Rai year-round climate Summer →

Spring Summer Fall Winter

Temperature in Chiang Rai 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 Chiang Rai reaches about 33°C and drops to 21°C overnight. The warmest of the three months is April, the coolest March.

How spring really feels in Chiang Rai

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

heat index over the day's high

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.

Chiang Rai 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	28° / 14°	22	3	10.9	7.7
Feb	31° / 15°	13	2.4	11.3	5.9
Mar	33° / 18°	42	5.1	11.9	4.1
Apr	34° / 21°	132	11.8	12.4	3.1
May	32° / 23°	292	22.8	12.9	2.8
Jun	31° / 24°	297	26.2	13.2	2.5
Jul	31° / 24°	398	28.4	13.1	2.6
Aug	30° / 24°	383	28.8	12.7	2.6
Sep	30° / 23°	295	25.1	12.1	3.0
Oct	30° / 22°	139	17.8	11.5	4.4
Nov	28° / 18°	49	6.7	11.1	6.7
Dec	26° / 15°	27	3.7	10.8	8.0

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time across spring.

Chance of precipitation in Spring

Any precipitation

Chiang Rai gets around 467 mm of rain over 40 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 5 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 36 min in early March to 13 h 06 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 Chiang Rai

In seasonPeak

In spring, Chiang Rai overlaps its monsoon season. The full year is below, with each hazard's peak months called out.

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

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is spring a good time to visit Chiang Rai?

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.

3.3

Sightseeing

3rd-best month of the year

5.9

Beach & pool

2nd-best month of the year

spring is a weaker month for outdoor sightseeing in Chiang Rai.

What to pack for Chiang Rai in Spring

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

In spring, Chiang Rai sees daytime highs around 33°C and nights near 21°C. Pack light clothes, rain gear and sun protection. About 40 days see rain.

light clothesrain gearsun protection

UV index in Chiang Rai in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages 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 Chiang Rai peaks around July 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 7 (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)	7	9	9	10	11	13	13	13	11	10	8	7
Level	Very high	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	High

	UV index (midday)	Level
Jan	7	Very high
Feb	9	Very high
Mar	9	Very high
Apr	10	Very high
May	11	Extreme
Jun	13	Extreme
Jul	13	Extreme
Aug	13	Extreme
Sep	11	Extreme
Oct	10	Very high
Nov	8	Very high
Dec	7	High

Air quality in Chiang Rai 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 Chiang Rai is worst in April — around 142 µg/m³ PM2.5 (unhealthy), about 12.0× the cleanest month (July, 12 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Chiang Rai's WHO annual average of 37 µg/m³.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	21	36	117	142	34	14	12	12	12	13	14	17
Level	Moderate	Poor	Unhealthy	Unhealthy	Moderate	Moderate	Good	Good	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	21	Moderate
Feb	36	Poor
Mar	117	Unhealthy
Apr	142	Unhealthy
May	34	Moderate
Jun	14	Moderate
Jul	12	Good
Aug	12	Good
Sep	12	Moderate
Oct	13	Moderate
Nov	14	Moderate
Dec	17	Moderate

Location & terrain

Where is Chiang Rai?

Chiang Rai sits at 19.9°N, 99.8°E, 401 m above sea level, in Thailand. The nearest listed city is Mae Chan, 27 km away.

Topography around Chiang Rai

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

Within 3 km, the terrain around Chiang Rai has only modest variations in elevation — a maximum elevation change of 66 m around an average of 398 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 815 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,937 m.

The land around Chiang Rai is covered by artificial surfaces (43%) and trees (36%) within 3 km, trees (52%) and cropland (33%) within 16 km, and trees (70%) and cropland (21%) within 80 km.

3 km

66 m

artificial surfaces 43%

16 km

815 m

trees 52%

80 km

1,937 m

trees 70%

treesgrasslandcroplandartificial surfaceswater

← Winter Chiang Rai year-round climate Summer →

Spring weather nearby: Mae Chan 27 km · Ban Khoan 56 km · Mae Sai 59 km · Tachilek 60 km · Ban Houakhoua 75 km · Phayao 80 km · Dok Kham Tai 85 km · San Kamphaeng 149 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 Chiang Rai (19.9086°, 99.8325°, elevation 401 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.