Si Sa Ket weather in December

In December, Si Sa Ket sees average daytime highs of 30°C and overnight lows near 20°C, with 7 mm of rain across 1.6 wet days and about 11.1 hours of daylight. It is the 12th-warmest and 11th-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 49% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 h 12 min at the start of December to 11 h 06 min by month's end. Set against the rest of the year, December is Si Sa Ket's 4th-clearest and 1st-windiest month. For the whole year in context, see Si Sa Ket's year-round climate.

Daytime high
30°
12th warmest
Overnight low
20°
2nd coldest
Rainfall
7 mm
1.6 wet days
Daylight
11 h 06 min
6:26 AM – 5:32 PM
Cloud cover
44%
4th clearest
Wind
13 km/h
1st windiest
Solar energy
4.76 kWh/m²
Travel score
5.9
out of 10

Si Sa Ket is town in Si Sa Ket province, Thailand.

Density
1,221/km²
people per km²

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 Si Sa Ket reaches about 30°C in the afternoon and slips back to 20°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, December runs on par with November and about 1°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13121
23121
33121
43121
53120
63120
73120
83120
93120
103120
113020
123020
133020
143020
153020
163019
173019
183019
193019
203019
213019
223019
233019
243019
253019
263019
273019
283019
293019
303019
313119

How December really feels in Si Sa Ket

Once humidity and wind are folded in, December averages 3 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
3
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.

Si Sa Ket weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 19°41.111.25.5
Feb33° / 21°71.711.54.3
Mar35° / 24°29611.92.7
Apr36° / 26°6611.412.31.9
May35° / 26°13420.312.71.9
Jun34° / 26°14420.212.92.2
Jul33° / 26°17123.312.82.4
Aug32° / 25°21824.912.52.4
Sep32° / 25°25024.412.12.6
Oct31° / 24°12114.911.73.8
Nov31° / 22°324.311.35.1
Dec30° / 20°71.611.15.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% 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 32%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26436
36436
46436
56337
66337
76337
86337
96337
106337
116337
126535
136535
146535
156634
166634
176832
186832
196931
207030
217129
227129
237228
247228
257327
267327
277525
287525
297525
307525
317525

Chance of precipitation in December

Any precipitation

Si Sa Ket gets around 7 mm of rain over 1.6 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 5% and peaks near 7% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
17
27
37
46
56
66
76
86
96
106
116
126
135
145
155
165
175
184
194
204
214
224
234
244
254
264
274
284
294
304
314

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 35% of days. Sticky, muggy-or-worse air turns up on roughly 45% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1292444192
22102444181
32102544171
42112643161
52112743161
63122842151
73122941141
83133041130
93133140130
103143139120
114143139110
124153238110
135163237100
146173136100
156173136100
16718313590
17818313490
18819313390
19920313280
201020313180
211021323070
221021323070
231122322960
241122332950
251122342950
261023342940
271023352940
28922362930
29922372930
30822373030
31722383030

Wind in December

Winds average 13 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712calm
2812calm
2912calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 12 min at the start of December to 11 h 06 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 5:27 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:175:27
211.26:185:28
311.26:195:28
411.26:195:28
511.16:205:28
611.16:205:29
711.16:215:29
811.16:215:29
911.16:225:30
1011.16:225:30
1111.16:235:30
1211.16:235:31
1311.16:245:31
1411.16:255:31
1511.16:255:32
1611.16:265:32
1711.16:265:33
1811.16:275:33
1911.16:275:33
2011.16:285:34
2111.16:285:34
2211.16:295:35
2311.16:295:35
2411.16:295:36
2511.16:305:36
2611.16:305:37
2711.16:315:37
2811.16:315:38
2911.16:325:38
3011.16:325:39
3111.16:325:39

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.76 kWh/m².

For context, solar energy here swings from a low near 4.42 kWh/m² to a high of 6.13 kWh/m² in April across the year — December's 4.76 kWh/m² sits near the bottom.

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
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in December

Hazard calendar for Si Sa Ket

In seasonPeak

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

Si Sa Ket's monsoon runs May–October, 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 Si Sa Ket?

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

5.9
Sightseeing
1st-best month of the year
8.3
Beach & pool
1st-best month of the year

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

What to pack for Si Sa Ket in December

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

In December, Si Sa Ket sees daytime highs around 30°C and nights near 20°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Si Sa Ket in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Si Sa Ket peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 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 12UV 13Nov 23UV 8
UV index (midday)Level
Jan9Very high
Feb10Very high
Mar11Extreme
Apr11Extreme
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Si Sa Ket 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 Si Sa Ket is worst in March — around 58 µg/m³ PM2.5 (unhealthy), about 3.1× the cleanest month (December, 19 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorPoorModerateMar 1656 µg/m³Dec 1319 µg/m³
PM2.5 (µg/m³)Level
Jan29Moderate
Feb45Poor
Mar58Unhealthy
Apr43Poor
May28Moderate
Jun21Moderate
Jul23Moderate
Aug23Moderate
Sep27Moderate
Oct28Moderate
Nov22Moderate
Dec19Moderate
Location & terrain

Where is Si Sa Ket?

Si Sa Ket sits at 15.1°N, 104.3°E, 134 m above sea level, in Thailand. The nearest listed city is Ubon Ratchathani, 57 km away.

SurinPhibun Mangsahan

Topography around Si Sa Ket

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

Within 3 km, the terrain around Si Sa Ket has only modest variations in elevation — a maximum elevation change of 32 m around an average of 126 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 45 m; within 80 km, significant variations in elevation — a maximum elevation change of 557 m.

The land around Si Sa Ket is covered by trees (47%) and artificial surfaces (31%) within 3 km, cropland (70%) within 16 km, and cropland (71%) and trees (25%) within 80 km.

3 km
32 m
16 km
45 m
80 km
557 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Ubon Ratchathani 57 km · Warin Chamrap 58 km · Kantharalak 63 km · Yasothon 78 km · Det Udom 84 km · Amnat Charoen 89 km · Surin 93 km · Phibun Mangsahan 98 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 Si Sa Ket (15.1148°, 104.3294°, elevation 134 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).