Tailândia weather in December

In December, Tailândia sees average daytime highs of 33°C and overnight lows near 24°C, with 149 mm of rain across 18.1 wet days and about 12.2 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 7% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of December to 12 h 12 min by month's end. Set against the rest of the year, December is Tailândia's 8th-clearest and 6th-windiest month. For the whole year in context, see Tailândia's year-round climate.

Daytime high
33°
5th warmest
Overnight low
24°
10th coldest
Rainfall
149 mm
18.1 wet days
Daylight
12 h 12 min
6:07 AM – 6:17 PM
Cloud cover
75%
8th clearest
Wind
7 km/h
6th windiest
Solar energy
5.22 kWh/m²
Travel score
2.6
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical December day in Tailândia reaches about 33°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 35°C. Set against its neighbours, December runs about 1°C cooler than November and about 2°C warmer than January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13424
23424
33424
43424
53424
63424
73424
83424
93424
103424
113424
123424
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253324
263324
273324
283324
293223
303223
313223

How December really feels in Tailândia

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.

Tailândia weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°28226.512.22.5
Feb31° / 23°32625.812.12.4
Mar31° / 23°39629.6122.4
Apr31° / 23°32628.111.92.5
May31° / 23°19423.811.92.9
Jun32° / 23°6513.711.83.7
Jul33° / 22°378.711.83.7
Aug35° / 23°194.511.93.1
Sep35° / 24°224.7122.8
Oct35° / 24°337.512.12.7
Nov34° / 24°7710.312.12.7
Dec33° / 24°14918.112.22.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 74%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13466
23466
33466
43466
53367
63268
73268
83169
93169
103070
112872
122872
132773
142674
152575
162476
172476
182377
192377
202278
212179
222179
232179
242179
252179
262080
271981
281981
291981
301882
311882

Chance of precipitation in December

Any precipitation

Tailândia gets around 149 mm of rain over 18.1 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 59% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
141
241
342
443
544
645
746
848
949
1051
1152
1253
1355
1456
1558
1659
1761
1862
1963
2064
2165
2267
2368
2469
2571
2672
2773
2874
2975
3076
3177

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 88% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
17867
27867
36877
46877
56877
65887
75887
85887
94897
104888
114888
124888
133898
143898
153898
163898
172908
182908
192908
202908
211909
221909
231909
2418910
2518910
2618910
2718811
2818811
2918712
3018712
3118613

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

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

Days grow by about 0 minutes over December. Sunrise moves from 6:01 AM to 6:14 AM, and sunset from 6:10 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:016:10
212.26:016:11
312.26:026:11
412.26:026:12
512.26:026:12
612.26:036:12
712.26:036:13
812.26:036:13
912.26:046:14
1012.26:046:14
1112.26:056:15
1212.26:056:15
1312.26:066:16
1412.26:066:16
1512.26:066:17
1612.26:076:17
1712.26:076:18
1812.26:086:18
1912.26:086:18
2012.26:096:19
2112.26:096:19
2212.26:106:20
2312.26:106:20
2412.26:116:21
2512.26:116:21
2612.26:126:22
2712.26:126:22
2812.26:136:23
2912.26:136:23
3012.26:136:24
3112.26:146:24

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.22 kWh/m².

For context, solar energy here swings from a low near 4.11 kWh/m² to a high of 6.29 kWh/m² in October across the year — December's 5.22 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.4Bright
105.4Bright
115.4Bright
125.3Bright
135.3Bright
145.3Bright
155.2Bright
165.2Bright
175.2Bright
185.1Bright
195.1Bright
205.1Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in December

Hazard calendar for Tailândia

In seasonPeak

None of Tailândia's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Tailândia's monsoon runs January–May, when most of the year's rain falls.

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

Is December a good time to visit Tailândia?

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

2.6
Sightseeing
8th-best month of the year
4.8
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Tailândia.

What to pack for Tailândia in December

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

In December, Tailândia sees daytime highs around 33°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

UV index in Tailândia in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tailândia peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 15Nov 23UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun11Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Very high
Dec10Very high

Air quality in Tailândia 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 Tailândia is worst in November — around 38 µg/m³ PM2.5 (poor), about 3.7× the cleanest month (June, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateModerateNov 1536 µg/m³Jun 1010 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun10Good
Jul12Moderate
Aug15Moderate
Sep18Moderate
Oct26Moderate
Nov38Poor
Dec22Moderate
Location & terrain

Where is Tailândia?

Tailândia sits at 2.9°S, 49.0°W, 47 m above sea level, in Brazil. The nearest listed city is Mocajuba, 74 km away.

Topography around Tailândia

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

Within 3 km, the terrain around Tailândia has only modest variations in elevation — a maximum elevation change of 29 m around an average of 48 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 75 m; within 80 km, only modest variations in elevation — a maximum elevation change of 153 m.

The land around Tailândia is covered by grassland (60%) and artificial surfaces (23%) within 3 km, grassland (56%) and trees (42%) within 16 km, and trees (77%) and grassland (22%) within 80 km.

3 km
29 m
16 km
75 m
80 km
153 m
treesgrasslandartificial surfacesbare terrainwater
December weather nearby: Mocajuba 74 km · Baião 82 km · Cametá 99 km · Goianésia do Pará 101 km · Tomé-Açu 107 km · Igarapé Miri 108 km · Moju 120 km · Tucuruí 122 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Tailândia (-2.9472°, -48.9531°, elevation 47 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. 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).