Lom Sak weather in December

In December, Lom Sak sees average daytime highs of 30°C and overnight lows near 18°C, with 9 mm of rain across 1.2 wet days and about 11 hours of daylight. It is the 12th-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 54% of the time in December, and the air most often feels humid.

Daylight stretches from about 11 h 06 min at the start of December to 11 hours by month's end. Set against the rest of the year, December is Lom Sak's 3rd-clearest and 1st-windiest month. For the whole year in context, see Lom Sak's year-round climate.

Daytime high
30°
12th warmest
Overnight low
18°
2nd coldest
Rainfall
9 mm
1.2 wet days
Daylight
11 hours
6:41 AM – 5:41 PM
Cloud cover
38%
3rd clearest
Wind
7 km/h
1st windiest
Solar energy
4.64 kWh/m²
Travel score
6.1
out of 10

Lom Sak is town in Lom Sak district, Phetchabun province, Thailand.

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 Lom Sak reaches about 30°C in the afternoon and slips back to 18°C overnight — a 12°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 about 1°C cooler than November and on par with January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13119
23119
33119
43119
53119
63119
73119
83119
93118
103018
113018
123018
133018
143018
153018
163018
173018
183017
193017
203017
213017
223017
233017
243017
253017
263017
273017
283017
293017
303017
313017

How December really feels in Lom Sak

Once humidity and wind are folded in, December averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Lom Sak weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 18°92.111.15.7
Feb32° / 19°111.811.44.8
Mar34° / 21°274.211.93.7
Apr35° / 24°407.312.42.8
May34° / 25°11216.712.82.5
Jun33° / 25°10816.8132.8
Jul32° / 24°13618.712.93.1
Aug31° / 24°16921.812.63.1
Sep31° / 24°15819.412.13.3
Oct32° / 23°699.611.64.2
Nov32° / 21°17211.25.1
Dec30° / 18°91.2116.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% 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 26%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17129
27129
37129
47129
57129
67030
77030
87030
97129
107129
117129
127327
137327
147327
157525
167525
177624
187723
197723
207822
217822
227921
237822
247822
257822
267822
277822
287723
297723
307525
317525

Chance of precipitation in December

Any precipitation

Lom Sak gets around 9 mm of rain over 1.2 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 4% and peaks near 6% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
34
44
53
63
73
83
93
103
113
123
132
142
152
162
172
183
193
203
213
224
234
244
255
265
275
285
296
306
316

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
171937298
282037288
382037277
492137267
592237257
6102337246
7102437236
8112437225
9112537225
10122537214
11132637204
12152636203
13162636193
14172636183
15182635182
16202635172
17212635172
18222634162
19232633162
20232633162
21242732152
22242732152
23252831152
24252831141
25242931141
26242932141
27233032131
28233033131
29223033131
30213134132
31203134142

Wind in December

Winds average 7 km/h in December, the windiest month of the year.

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
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 06 min at the start of December to 11 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:33 AM to 6:48 AM, and sunset from 5:37 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.16:335:37
211.16:335:37
311.16:345:37
411.16:345:38
511.06:355:38
611.06:365:38
711.06:365:38
811.06:375:39
911.06:375:39
1011.06:385:39
1111.06:385:39
1211.06:395:40
1311.06:395:40
1411.06:405:41
1511.06:415:41
1611.06:415:41
1711.06:425:42
1811.06:425:42
1911.06:435:43
2011.06:435:43
2111.06:445:43
2211.06:445:44
2311.06:455:44
2411.06:455:45
2511.06:455:45
2611.06:465:46
2711.06:465:46
2811.06:475:47
2911.06:475:47
3011.06:475:48
3111.06:485:49

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.64 kWh/m².

For context, solar energy here swings from a low near 3.84 kWh/m² to a high of 6.12 kWh/m² in April across the year — December's 4.64 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in December

Hazard calendar for Lom Sak

In seasonPeak

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

Lom Sak's rainy season runs May–September, when most of the year's rain falls.

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

Is December a good time to visit Lom Sak?

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

6.1
Sightseeing
1st-best month of the year
8.5
Beach & pool
1st-best month of the year

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

What to pack for Lom Sak in December

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

In December, Lom Sak sees daytime highs around 30°C and nights near 18°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Lom Sak 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 Lom Sak peaks around August 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 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 13UV 13Dec 12UV 8
UV index (midday)Level
Jan9Very high
Feb10Extreme
Mar12Extreme
Apr11Extreme
May12Extreme
Jun13Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Lom Sak 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 Lom Sak is worst in March — around 49 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (June, 19 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1648 µg/m³Jun 2319 µg/m³
PM2.5 (µg/m³)Level
Jan31Moderate
Feb42Poor
Mar49Poor
Apr40Poor
May26Moderate
Jun19Moderate
Jul19Moderate
Aug19Moderate
Sep20Moderate
Oct22Moderate
Nov21Moderate
Dec24Moderate
Location & terrain

Where is Lom Sak?

Lom Sak sits at 16.8°N, 101.2°E, 147 m above sea level, in Thailand. The nearest listed city is Phetchabun, 41 km away.

Kaset SombunLoeiChum Phae

Topography around Lom Sak

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

Within 3 km, the terrain around Lom Sak has only modest variations in elevation — a maximum elevation change of 22 m around an average of 146 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 848 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,744 m.

The land around Lom Sak is covered by cropland (53%) and trees (29%) within 3 km, trees (53%) and cropland (38%) within 16 km, and trees (73%) within 80 km.

3 km
22 m
16 km
848 m
80 km
1,744 m
treesgrasslandcroplandartificial surfaces
December weather nearby: Phetchabun 41 km · Phu Kradueng 69 km · Chon Daen 77 km · Wang Saphung 81 km · Nong Phai 90 km · Kaset Sombun 94 km · Loei 94 km · Chum Phae 95 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 Lom Sak (16.7798°, 101.2422°, elevation 147 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).