Hat Yai climate

Name: Hat Yai
Address: TH

Hat Yai is warmest in April, with average highs of 32 °C, and coldest in January, when nights average 23 °C. November is the wettest month (345 mm) and February the driest (43 mm). Figures are 1991–2020 climate normals.

Across a full year Hat Yai averages 1,982 mm of rain and 363 days above 25 °C.

Thailand · population 191,696 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month April 32 °C
Coldest month January 23 °C
Driest month February 43 mm
Wettest month November 345 mm
Least cloud February 60 % cloud
Hottest on record April 37 °C
Coldest on record February 18 °C
Warmest sea May 31 °C

What to expectHat Yai through the year

Hat Yai changes little through the year. Average daily highs stay between 29 and 32 °C, so no month stands out as a season in the way it would further from the equator.

Counted across a normal year, 363 days a year reach 25 °C, 206 of them reach 30 °C. The warmest reading in the 1991–2020 record is 37 °C, in April.

Rain is strongly seasonal. November averages 345 mm against 43 mm in February — 7.9 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Hat Yai is warmest in May at 31 °C and coldest in January at 28 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	28.8 °C	85 mm	67 %
February	30.3 °C	43 mm	60 %
March	31.5 °C	94 mm	62 %
April	31.8 °C	136 mm	71 %
May	31.5 °C	164 mm	82 %
June	31.2 °C	122 mm	82 %
July	31.0 °C	123 mm	84 %
August	31.1 °C	128 mm	83 %
September	30.4 °C	172 mm	86 %
October	29.3 °C	296 mm	89 %
November	28.3 °C	345 mm	86 %
December	27.9 °C	273 mm	80 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	28.8 °C	23.0 °C	25.6 °C	32.4 °C	19.3 °C	31	4
February	30.3 °C	23.2 °C	26.4 °C	34.5 °C	18.3 °C	28	17
March	31.5 °C	23.8 °C	27.1 °C	36.3 °C	19.4 °C	31	26
April	31.8 °C	24.6 °C	27.6 °C	37.2 °C	21.6 °C	30	26
May	31.5 °C	24.8 °C	27.5 °C	35.8 °C	22.9 °C	31	27
June	31.2 °C	24.7 °C	27.4 °C	35.2 °C	22.4 °C	30	25
July	31.0 °C	24.4 °C	27.1 °C	36.3 °C	22.5 °C	31	25
August	31.1 °C	24.3 °C	27.1 °C	36.2 °C	22.6 °C	31	24
September	30.4 °C	24.1 °C	26.6 °C	35.4 °C	22.2 °C	30	20
October	29.3 °C	23.8 °C	25.9 °C	34.0 °C	21.7 °C	31	9
November	28.3 °C	23.7 °C	25.5 °C	30.9 °C	22.1 °C	29	2
December	27.9 °C	23.3 °C	25.3 °C	30.5 °C	20.6 °C	30	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	85 mm	12	12 h/day	67 %	82 %	17 km/h	27.8 °C
February	43 mm	7	12 h/day	60 %	78 %	17 km/h	28.0 °C
March	94 mm	13	12 h/day	62 %	79 %	15 km/h	28.9 °C
April	136 mm	19	12 h/day	71 %	82 %	12 km/h	30.0 °C
May	164 mm	23	12 h/day	82 %	84 %	10 km/h	30.5 °C
June	122 mm	20	13 h/day	82 %	83 %	11 km/h	30.5 °C
July	123 mm	20	12 h/day	84 %	83 %	12 km/h	30.1 °C
August	128 mm	21	12 h/day	83 %	82 %	13 km/h	29.9 °C
September	172 mm	24	12 h/day	86 %	85 %	12 km/h	29.5 °C
October	296 mm	28	12 h/day	89 %	89 %	11 km/h	29.3 °C
November	345 mm	27	12 h/day	86 %	90 %	12 km/h	28.8 °C
December	273 mm	21	12 h/day	80 %	87 %	15 km/h	28.1 °C

How Hat Yai compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Hat Yai	32 °C	23 °C	1,982 mm	363
Alor Setar · Malaysia	33 °C	23 °C	2,232 mm	365
Sungai Petani · Malaysia	31 °C	23 °C	2,396 mm	365
Kota Kuala Muda · Malaysia	31 °C	23 °C	2,419 mm	365
George Town · Malaysia	30 °C	24 °C	2,487 mm	365
Bukit Mertajam · Malaysia	31 °C	23 °C	2,589 mm	365
Kulim · Malaysia	30 °C	22 °C	2,776 mm	365

Where Hat Yai ranks

Ranking	Position	Value
Warmest sea temperatures in Asia in May	11thof 50	31 °C
Warmest sea temperatures in the world in May	12thof 50	31 °C
Warmest sea temperatures in Asia in June	14thof 50	31 °C
Warmest sea temperatures in the world in June	15thof 50	31 °C
Warmest sea temperatures in Asia in April	26thof 50	30 °C
Warmest sea temperatures in the world in April	26thof 50	30 °C

Planning a trip? See the best time to visit Hat Yai.

QuestionsCommon questions about Hat Yai’s climate

When is the best time to visit Hat Yai?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, November, December sit closest to 20 °C on average, April is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does Hat Yai get?

In April, the warmest month, daily highs average 32 °C. About 206 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.

How cold does it get in winter?

Nights average 23 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Hat Yai?

November, averaging 345 mm over 27 days with rain. The driest month is February with 43 mm. The year as a whole averages 1,982 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Hat Yai rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.