Khlong Sam Wa climate

Name: Khlong Sam Wa
Address: TH

Khlong Sam Wa is warmest in April, with average highs of 35 °C, and coldest in December, when nights average 21 °C. September is the wettest month (262 mm) and December the driest (8.7 mm). Figures are 1991–2020 climate normals.

Across a full year Khlong Sam Wa averages 1,308 mm of rain and 364 days above 25 °C.

Thailand · population 169,489 · 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 35 °C
Coldest month December 21 °C
Driest month December 9 mm
Wettest month September 262 mm
Least cloud February 37 % cloud
Hottest on record April 39 °C
Coldest on record December 12 °C

What to expectKhlong Sam Wa through the year

Khlong Sam Wa has a clear annual cycle: average daily highs run from 31 °C in December to 35 °C in April, a swing of 4.0 °C in mean temperature across the year.

Counted across a normal year, 364 days a year reach 25 °C, 311 of them reach 30 °C. The warmest reading in the 1991–2020 record is 39 °C, in April.

Rain is strongly seasonal. September averages 262 mm against 9 mm in December — 30 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	31.1 °C	16 mm	41 %
February	32.4 °C	17 mm	37 %
March	33.8 °C	51 mm	44 %
April	34.5 °C	85 mm	57 %
May	33.3 °C	154 mm	80 %
June	32.2 °C	150 mm	88 %
July	31.6 °C	161 mm	89 %
August	31.4 °C	174 mm	91 %
September	31.0 °C	262 mm	88 %
October	30.6 °C	189 mm	74 %
November	31.0 °C	39 mm	53 %
December	30.7 °C	9 mm	47 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	31.1 °C	21.0 °C	26.0 °C	34.7 °C	12.7 °C	31	24
February	32.4 °C	22.7 °C	27.3 °C	36.3 °C	14.4 °C	28	26
March	33.8 °C	24.7 °C	28.7 °C	37.7 °C	17.2 °C	31	30
April	34.5 °C	26.1 °C	29.7 °C	38.8 °C	20.7 °C	30	29
May	33.3 °C	26.1 °C	29.1 °C	38.7 °C	22.9 °C	31	29
June	32.2 °C	25.8 °C	28.5 °C	38.0 °C	23.7 °C	30	28
July	31.6 °C	25.4 °C	27.9 °C	37.1 °C	23.6 °C	31	27
August	31.4 °C	25.1 °C	27.7 °C	35.6 °C	23.5 °C	31	26
September	31.0 °C	24.6 °C	27.2 °C	35.1 °C	21.3 °C	30	24
October	30.6 °C	23.7 °C	26.7 °C	33.7 °C	17.7 °C	31	23
November	31.0 °C	22.5 °C	26.5 °C	34.8 °C	15.3 °C	30	23
December	30.7 °C	20.8 °C	25.7 °C	34.2 °C	11.8 °C	31	21

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	16 mm	3	11 h/day	41 %	67 %	11 km/h
February	17 mm	4	12 h/day	37 %	69 %	13 km/h
March	51 mm	8	12 h/day	44 %	72 %	15 km/h
April	85 mm	13	12 h/day	57 %	72 %	14 km/h
May	154 mm	22	13 h/day	80 %	77 %	14 km/h
June	150 mm	23	13 h/day	88 %	78 %	15 km/h
July	161 mm	24	13 h/day	89 %	79 %	16 km/h
August	174 mm	25	13 h/day	91 %	80 %	15 km/h
September	262 mm	26	12 h/day	88 %	83 %	12 km/h
October	189 mm	21	12 h/day	74 %	83 %	10 km/h
November	39 mm	6	11 h/day	53 %	72 %	12 km/h
December	9 mm	2	11 h/day	47 %	63 %	12 km/h

How Khlong Sam Wa 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
Khlong Sam Wa	35 °C	21 °C	1,308 mm	364
Sai Mai · Thailand	35 °C	21 °C	1,447 mm	364
Pak Kret · Thailand	35 °C	21 °C	1,282 mm	364
Bangkok · Thailand	35 °C	21 °C	1,176 mm	364

Where Khlong Sam Wa ranks

Ranking	Position	Value
The warmest places in Asia in December	16th of 50	31 °C
The warmest places in Asia in January	22nd of 50	31 °C
The warmest places in Asia in November	35th of 50	31 °C
The warmest places in Asia in February	41st of 50	32 °C

Planning a trip? See the best time to visit Khlong Sam Wa.

QuestionsCommon questions about Khlong Sam Wa’s climate

When is the best time to visit Khlong Sam Wa?

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 December the driest. The month-by-month table above has the full picture.

How hot does Khlong Sam Wa get?

In April, the warmest month, daily highs average 35 °C. About 311 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.

How cold does it get in winter?

Nights average 21 °C in December, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Khlong Sam Wa?

September, averaging 262 mm over 26 days with rain. The driest month is December with 9 mm. The year as a whole averages 1,308 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 Khlong Sam Wa 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
Data point: 13.871°, 100.737° (the coordinates the reanalysis values are taken for)
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.