Samut Sakhon weather in December

In December, Samut Sakhon sees average daytime highs of 30°C and overnight lows near 24°C, with 11 mm of rain across 2.2 wet days and about 11.2 hours of daylight. It is the 11th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 45% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 h 18 min at the start of December to 11 h 12 min by month's end. Set against the rest of the year, December is Samut Sakhon's 4th-clearest and 8th-windiest month. For the whole year in context, see Samut Sakhon's year-round climate.

Daytime high
30°
11th warmest
Overnight low
24°
2nd coldest
Rainfall
11 mm
2.2 wet days
Daylight
11 h 12 min
6:39 AM – 5:51 PM
Cloud cover
48%
4th clearest
Wind
11 km/h
8th windiest
Solar energy
4.79 kWh/m²
Travel score
6.3
out of 10

Samut Sakhon is city in Samut Sakhon province, Thailand.

Air quality
High
PM2.5 29 µg/m³ · 2019
Density
6,147/km²
people per km²
Founded
1548

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical December day in Samut Sakhon reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, December runs on par with November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
182924
192924
202923
212923
222923
232923
242923
252923
262923
272923
282923
292923
302923
312923

How December really feels in Samut Sakhon

Once humidity and wind are folded in, December averages 6 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
6
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Samut Sakhon weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°152.711.36.5
Feb30° / 25°122.611.56.2
Mar31° / 27°436.411.95.2
Apr32° / 28°749.712.34.1
May32° / 28°13720.412.63.0
Jun31° / 28°11120.812.82.9
Jul31° / 27°1142112.73.1
Aug31° / 27°12522.112.53.1
Sep30° / 27°21924.512.12.9
Oct30° / 26°22721.511.73.6
Nov30° / 25°506.711.45.2
Dec30° / 24°112.211.26.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 21% of December, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25941
36040
46040
56040
66040
76040
86139
96139
106238
116337
126337
136436
146436
156634
166634
176733
186733
196832
206832
216832
226931
236931
247030
257030
267030
277030
287030
297030
307129
317129

Chance of precipitation in December

Any precipitation

Samut Sakhon gets around 11 mm of rain over 2.2 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 7% and peaks near 11% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
111
211
311
410
510
610
79
89
99
108
118
127
137
146
156
166
176
186
196
205
215
225
235
245
255
265
275
285
295
306
316

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the muggy band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 69% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11414303616
21414313615
31515313514
41515323413
51516333312
61516343311
71617343211
81618353110
9161835319
10171935309
11171935308
12182035297
13192034297
14192034296
152102133296
162102132296
173112131296
183112130295
193122229295
204122228295
214122227295
224132327294
234122327294
245122327294
255122427294
265122428293
275112428293
285102429303
294102329303
30492329313
31482330323

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 18 min at the start of December to 11 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:31 AM to 6:46 AM, and sunset from 5:46 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.36:315:46
211.36:315:47
311.26:325:47
411.26:335:47
511.26:335:47
611.26:345:48
711.26:345:48
811.26:355:48
911.26:355:49
1011.26:365:49
1111.26:365:49
1211.26:375:50
1311.26:375:50
1411.26:385:50
1511.26:385:51
1611.26:395:51
1711.26:395:52
1811.26:405:52
1911.26:405:53
2011.26:415:53
2111.26:415:53
2211.26:425:54
2311.26:425:54
2411.26:435:55
2511.26:435:55
2611.26:445:56
2711.26:445:56
2811.26:455:57
2911.26:455:57
3011.26:455:58
3111.26:465:58

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.79 kWh/m².

For context, solar energy here swings from a low near 4.6 kWh/m² to a high of 6.33 kWh/m² in April across the year — December's 4.79 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in December

Hazard calendar for Samut Sakhon

In seasonPeak

In December, Samut Sakhon sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Samut Sakhon sits in the Pacific typhoon belt; the season peaks July–October.

Samut Sakhon's monsoon runs May–October, when most of the year's rain falls.

Pacific typhoon
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Samut Sakhon?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.3
Sightseeing
2nd-best month of the year
8.3
Beach & pool
3rd-best month of the year

December is a reasonable time to visit Samut Sakhon for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Samut Sakhon in December

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

In December, Samut Sakhon sees daytime highs around 30°C and nights near 24°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

Sea temperature near Samut Sakhon in December

The nearest coast averages about 28°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 km away) is warmest in May at about 31°C and coldest in January near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Samut Sakhon in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Samut Sakhon peaks around August 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 16UV 13Nov 21UV 8
UV index (midday)Level
Jan9Very high
Feb9Very high
Mar12Extreme
Apr12Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct9Very high
Nov8Very high
Dec8Very high

Air quality in Samut Sakhon in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Samut Sakhon is worst in January — around 45 µg/m³ PM2.5 (poor), about 2.5× the cleanest month (August, 18 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Samut Sakhon's WHO annual average of 29 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 1544 µg/m³Aug 1018 µg/m³
PM2.5 (µg/m³)Level
Jan45Poor
Feb38Poor
Mar27Moderate
Apr24Moderate
May21Moderate
Jun18Moderate
Jul18Moderate
Aug18Moderate
Sep23Moderate
Oct34Moderate
Nov40Poor
Dec40Poor
Location & terrain

Where is Samut Sakhon?

Samut Sakhon sits at 13.5°N, 100.3°E, 14 m above sea level, in Thailand. The nearest listed city is Krathum Baen, 12 km away.

Topography around Samut Sakhon

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

Within 3 km, the terrain around Samut Sakhon has only modest variations in elevation — a maximum elevation change of 16 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 42 m; within 80 km, large variations in elevation — a maximum elevation change of 638 m.

The land around Samut Sakhon is covered by artificial surfaces (57%) and trees (22%) within 3 km, water (41%), trees (22%) and artificial surfaces (20%) within 16 km, and water (34%), cropland (25%) and trees (20%) within 80 km.

3 km
16 m
16 km
42 m
80 km
638 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
December weather nearby: Krathum Baen 12 km · Ban Samae Dam 13 km · Bang Bon Nuea 15 km · Ban Khlong Bang Bon 15 km · Bangbontai 15 km · Ban Khlong Bang Phran 18 km · Bang Bon 18 km · Ban Phaeo 19 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
Buddhist 93%Muslim 5%Christian 1%other 1%

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 Samut Sakhon (13.5475°, 100.2736°, elevation 14 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).