Khlong Yai weather in December

In December, Khlong Yai sees average daytime highs of 31°C and overnight lows near 22°C, with 38 mm of rain across 6.7 wet days and about 11.3 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 24% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 24 min at the start of December to 11 h 18 min by month's end. Set against the rest of the year, December is Khlong Yai's 3rd-clearest and 4th-windiest month. For the whole year in context, see Khlong Yai's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
22°
3rd coldest
Rainfall
38 mm
6.7 wet days
Daylight
11 h 18 min
6:25 AM – 5:44 PM
Cloud cover
60%
3rd clearest
Wind
6 km/h
4th windiest
Solar energy
4.93 kWh/m²
Travel score
4.8
out of 10

Khlong Yai is subdistrict municipality in Trat province, Thailand.

Founded
1955

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 31°C through the month.

A typical December day in Khlong Yai reaches about 31°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°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)
13122
23122
33122
43122
53122
63122
73122
83122
93122
103122
113122
123122
133122
143122
153122
163122
173121
183121
193121
203121
213121
223121
233121
243121
253121
263121
273121
283121
293121
303121
313121

How December really feels in Khlong Yai

Once humidity and wind are folded in, December averages 31 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
31
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.

Khlong Yai weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 21°569.511.44.6
Feb31° / 22°7813.311.64.2
Mar31° / 23°15921.911.93.4
Apr31° / 24°21526.312.32.7
May30° / 24°33729.612.52.6
Jun29° / 24°47129.112.72.8
Jul28° / 24°58230.412.62.9
Aug28° / 24°58330.612.42.9
Sep29° / 23°51229.612.12.8
Oct30° / 23°37527.311.73.0
Nov31° / 22°11514.711.54.0
Dec31° / 22°386.711.34.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 26% of December, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34654
44753
54555
64555
74555
84555
94654
104753
114753
124753
134753
144852
154852
164852
175050
185050
195050
205149
215149
225248
235347
245248
255248
265347
275347
285446
295446
305446
315545

Chance of precipitation in December

Any precipitation

Khlong Yai gets around 38 mm of rain over 6.7 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 23% and peaks near 32% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
132
231
330
429
528
627
727
826
925
1025
1124
1223
1323
1422
1522
1621
1721
1820
1920
2019
2119
2218
2318
2418
2518
2618
2718
2818
2919
3020
3121

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 70% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1041329513
2041329513
3051430493
4051531473
5051531462
6051632452
7051733432
8051734422
9051835402
10051836392
11051936382
12052036371
13152136361
14162135351
15162235351
16162334341
17172434341
18272433331
19282532321
20282532320
21292631310
222102631300
232102731300
242112731290
252112732280
262112632280
272112633280
282112534270
292112535280
302112435280
312112336280

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 24 min at the start of December to 11 h 18 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 6:17 AM to 6:32 AM, and sunset from 5:39 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:175:39
211.46:185:39
311.36:185:39
411.36:195:40
511.36:205:40
611.36:205:40
711.36:215:41
811.36:215:41
911.36:225:41
1011.36:225:42
1111.36:235:42
1211.36:235:42
1311.36:245:43
1411.36:245:43
1511.36:255:44
1611.36:255:44
1711.36:265:44
1811.36:265:45
1911.36:275:45
2011.36:275:46
2111.36:285:46
2211.36:285:47
2311.36:295:47
2411.36:295:48
2511.36:305:48
2611.36:305:49
2711.36:305:49
2811.36:315:50
2911.36:315:50
3011.36:325:51
3111.36:325:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.93 kWh/m².

For context, solar energy here swings from a low near 3.92 kWh/m² to a high of 5.74 kWh/m² in March across the year — December's 4.93 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in December

Hazard calendar for Khlong Yai

In seasonPeak

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

Khlong Yai sits in the Pacific typhoon belt; the season peaks July–October.

Khlong Yai'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 Khlong Yai?

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

4.8
Sightseeing
1st-best month of the year
7.0
Beach & pool
1st-best month of the year

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

What to pack for Khlong Yai in December

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

In December, Khlong Yai sees daytime highs around 31°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near Khlong Yai in December

The nearest coast averages about 29°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in May at about 31°C and coldest in January near 28°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
Jan28Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Khlong Yai in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Khlong Yai peaks around August 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 18UV 14Dec 13UV 9
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar13Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in Khlong Yai 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 Khlong Yai is worst in February — around 40 µg/m³ PM2.5 (poor), about 3.8× the cleanest month (November, 11 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateGoodFeb 1539 µg/m³Nov 1411 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb40Poor
Mar27Moderate
Apr19Moderate
May13Moderate
Jun12Moderate
Jul13Moderate
Aug12Good
Sep11Good
Oct11Good
Nov11Good
Dec12Good
Location & terrain

Where is Khlong Yai?

Khlong Yai sits at 11.8°N, 102.9°E, 45 m above sea level, in Thailand. The nearest listed city is Koh Kong, 21 km away.

Laem SingPailin

Topography around Khlong Yai

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

Within 3 km, the terrain around Khlong Yai has significant variations in elevation — a maximum elevation change of 324 m around an average of 57 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 741 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,728 m.

The land around Khlong Yai is covered by trees (52%) and water (34%) within 3 km, trees (49%) and water (44%) within 16 km, and trees (52%) and water (42%) within 80 km.

3 km
324 m
16 km
741 m
80 km
1,728 m
treesgrasslandcroplandartificial surfaceswatermangroves
December weather nearby: Koh Kong 21 km · Smach Mean Chey 30 km · Trat 66 km · Laem Ngop 69 km · Ko Chang 71 km · Khao Saming 81 km · Laem Sing 118 km · Pailin 123 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 Khlong Yai (11.7765°, 102.8873°, elevation 45 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).