Chon Buri climate

Name: Chon Buri
Address: TH

Chon Buri is warmest in April, with average highs of 34 °C, and coldest in December, when nights average 22 °C. September is the wettest month (229 mm) and December the driest (11 mm). Figures are 1991–2020 climate normals.

Across a full year Chon Buri averages 1,207 mm of rain and 364 days above 25 °C.

Thailand · population 219,164 · 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 34 °C
Coldest month December 22 °C
Driest month December 11 mm
Wettest month September 229 mm
Least cloud February 39 % cloud
Hottest on record April 38 °C
Coldest on record December 13 °C
Warmest sea May 31 °C

What to expectChon Buri through the year

Chon Buri has a clear annual cycle: average daily highs run from 31 °C in December to 34 °C in April, a swing of 3.2 °C in mean temperature across the year.

Counted across a normal year, 364 days a year reach 25 °C, 292 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in April.

Rain is strongly seasonal. September averages 229 mm against 11 mm in December — 21 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Chon Buri is warmest in May at 31 °C and coldest in January at 27 °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	31.4 °C	21 mm	44 %
February	32.3 °C	24 mm	39 %
March	33.1 °C	61 mm	45 %
April	33.7 °C	94 mm	58 %
May	32.5 °C	143 mm	81 %
June	31.6 °C	120 mm	87 %
July	31.0 °C	131 mm	88 %
August	30.8 °C	133 mm	90 %
September	30.4 °C	229 mm	89 %
October	30.2 °C	199 mm	77 %
November	30.9 °C	42 mm	56 %
December	30.8 °C	11 mm	50 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	31.4 °C	21.8 °C	26.5 °C	35.4 °C	14.1 °C	31	25
February	32.3 °C	23.2 °C	27.5 °C	35.8 °C	15.6 °C	28	27
March	33.1 °C	24.9 °C	28.6 °C	37.1 °C	17.6 °C	31	30
April	33.7 °C	26.1 °C	29.4 °C	37.8 °C	20.3 °C	30	29
May	32.5 °C	26.2 °C	28.9 °C	37.8 °C	23.8 °C	31	28
June	31.6 °C	26.2 °C	28.5 °C	36.6 °C	23.9 °C	30	26
July	31.0 °C	25.9 °C	28.1 °C	34.8 °C	23.7 °C	31	23
August	30.8 °C	25.7 °C	27.9 °C	34.8 °C	23.6 °C	31	23
September	30.4 °C	24.9 °C	27.3 °C	34.2 °C	22.3 °C	30	19
October	30.2 °C	23.9 °C	26.7 °C	35.5 °C	18.3 °C	31	19
November	30.9 °C	23.0 °C	26.7 °C	35.3 °C	16.5 °C	30	22
December	30.8 °C	21.5 °C	26.2 °C	34.7 °C	12.8 °C	31	22

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	21 mm	4	11 h/day	44 %	64 %	14 km/h	27.4 °C
February	24 mm	5	12 h/day	39 %	68 %	14 km/h	28.0 °C
March	61 mm	10	12 h/day	45 %	72 %	15 km/h	29.0 °C
April	94 mm	14	12 h/day	58 %	73 %	14 km/h	30.2 °C
May	143 mm	21	13 h/day	81 %	77 %	14 km/h	30.6 °C
June	120 mm	20	13 h/day	87 %	77 %	16 km/h	30.2 °C
July	131 mm	22	13 h/day	88 %	78 %	16 km/h	29.7 °C
August	133 mm	23	13 h/day	90 %	79 %	16 km/h	29.5 °C
September	229 mm	24	12 h/day	89 %	83 %	13 km/h	29.4 °C
October	199 mm	22	12 h/day	77 %	83 %	12 km/h	29.4 °C
November	42 mm	7	12 h/day	56 %	70 %	15 km/h	28.9 °C
December	11 mm	2	11 h/day	50 %	61 %	16 km/h	27.8 °C

How Chon Buri 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
Chon Buri	34 °C	22 °C	1,207 mm	364
Si Racha · Thailand	32 °C	23 °C	1,214 mm	364
Samut Prakan · Thailand	33 °C	22 °C	1,132 mm	364
Khlong Sam Wa · Thailand	35 °C	21 °C	1,308 mm	364

Where Chon Buri ranks

Ranking	Position	Value
Warmest sea temperatures in Asia in May	7thof 50	31 °C
Warmest sea temperatures in the world in May	8thof 50	31 °C
The warmest places in Asia in December	10thof 50	31 °C
Warmest sea temperatures in Asia in April	11thof 50	30 °C
Warmest sea temperatures in the world in April	11thof 50	30 °C
The warmest places in Asia in January	12thof 50	31 °C

Planning a trip? See the best time to visit Chon Buri.

QuestionsCommon questions about Chon Buri’s climate

When is the best time to visit Chon Buri?

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

How hot does Chon Buri get?

In April, the warmest month, daily highs average 34 °C. About 292 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 22 °C in December, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Chon Buri?

September, averaging 229 mm over 24 days with rain. The driest month is December with 11 mm. The year as a whole averages 1,207 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 Chon Buri 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.