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Samut Sakhon, Thailand climate

Aw Tropical savanna (dry winter)

Samut Sakhon has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is April with an average daily high near 36°C, while the coldest is December averaging around 23°C at night. Precipitation totals about 1729 mm a year and is strongly seasonal — September alone averages 341 mm while December barely receives 12 mm.

☀️ All year

Very hot

Daytime highs near 36°C most of the year.

About 282 days a year above 32 °C

🌙 Nights

Stays warm

Even the coolest nights stay near 23°C.

🌧️ Rain

Very wet

About 1729 mm of rain a year.

Wettest in September

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

+0.8 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Samut Sakhon climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	33	34	35	36	35	34	33	33	33	33	33	32
Avg temp (°C)	28	29	31	32	31	30	30	30	29	29	29	28
Avg low (°C)	23	25	26	27	27	26	26	26	25	25	25	23
Precipitation (mm)	36	31	33	78	230	176	218	257	341	273	44	12

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	33	34	35	36	35	34
Avg temp (°C)	28	29	31	32	31	30
Avg low (°C)	23	25	26	27	27	26
Precipitation (mm)	36	31	33	78	230	176

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	33	33	33	33	33	32
Avg temp (°C)	30	30	29	29	29	28
Avg low (°C)	26	26	25	25	25	23
Precipitation (mm)	218	257	341	273	44	12

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	3	2	4	6	14	17	17	19	21	18	6	2
Days with high ≥ 32°C (days)	21	24	27	27	27	26	24	24	22	22	21	17

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	3	2	4	6	14	17
Days with high ≥ 32°C (days)	21	24	27	27	27	26

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	17	19	21	18	6	2
Days with high ≥ 32°C (days)	24	24	22	22	21	17

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	38	36	47	60	81	87	89	91	89	77	55	43
Clear days (≤ 30% cloud)	15	15	10	6	1	0.3	0.2	0.1	0.2	2	8	13
Partly cloudy days (30–70%)	10	9	12	12	6	4	4	3	3	7	11	11
Cloudy days (≥ 70%)	6	4	9	12	24	26	27	28	27	22	11	7
Relative humidity (%)	66	66	68	70	76	80	80	81	84	84	80	71
Wind speed (m/s)	2.3	2.7	3.0	2.8	2.6	2.8	2.9	2.8	2.2	2.0	2.5	2.7

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	38	36	47	60	81	87
Clear days (≤ 30% cloud)	15	15	10	6	1	0.3
Partly cloudy days (30–70%)	10	9	12	12	6	4
Cloudy days (≥ 70%)	6	4	9	12	24	26
Relative humidity (%)	66	66	68	70	76	80
Wind speed (m/s)	2.3	2.7	3.0	2.8	2.6	2.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	89	91	89	77	55	43
Clear days (≤ 30% cloud)	0.2	0.1	0.2	2	8	13
Partly cloudy days (30–70%)	4	3	3	7	11	11
Cloudy days (≥ 70%)	27	28	27	22	11	7
Relative humidity (%)	80	81	84	84	80	71
Wind speed (m/s)	2.9	2.8	2.2	2.0	2.5	2.7

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 28 years of daily observations at Bangkok Metropolis, a weather station, about 38 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →