Lom Sak weather in January

In January, Lom Sak sees average daytime highs of 31°C and overnight lows near 18°C, with 9 mm of rain across 2.1 wet days and about 11.1 hours of daylight. It is the 10th-warmest and 11th-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 57% of the time in January, and the air most often feels humid.

Daylight stretches from about 11 hours at the start of January to 11 h 12 min by month's end. Set against the rest of the year, January is Lom Sak's 2nd-clearest and 5th-windiest month. For the whole year in context, see Lom Sak's year-round climate.

Daytime high
31°
10th warmest
Overnight low
18°
1st coldest
Rainfall
9 mm
2.1 wet days
Daylight
11 h 06 min
6:51 AM – 5:57 PM
Cloud cover
38%
2nd clearest
Wind
6 km/h
5th windiest
Solar energy
4.81 kWh/m²
Travel score
5.7
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 January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical January day in Lom Sak reaches about 31°C in the afternoon and slips back to 18°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 34°C. Set against its neighbours, January runs on par with December and about 2°C cooler than February.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13017
23017
33017
43017
53017
63017
73117
83117
93117
103117
113117
123117
133117
143118
153118
163118
173118
183118
193118
203118
213118
223118
233118
243118
253118
263118
273118
283118
293118
303118
313118

How January really feels in Lom Sak

Once humidity and wind are folded in, January 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

January 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 January compares with the rest of the year at a glance. January is the 10th-warmest and 11th-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 19% of January, with mostly cloudy or overcast conditions the remaining 24%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17426
27327
37327
47327
57129
67129
77129
87129
97129
107129
117129
127129
137228
147327
157426
167525
177624
187723
197723
207822
217822
228020
238020
248119
258119
268218
278218
288218
298317
308317
318317

Chance of precipitation in January

Any precipitation

Lom Sak gets around 9 mm of rain over 2.1 wet days in January. 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 7% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
17
27
37
47
57
67
77
87
97
107
117
127
137
147
157
167
177
187
197
207
217
227
237
247
257
267
277
287
297
307
317

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the humid band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1193135142
2183136142
3173136142
4163237142
5153237142
6153138142
7153138132
8143139132
9143139133
10143139133
11143139133
12143139133
13143139143
14143138143
15143138144
16143137154
17143136154
18143136164
19143135165
20143134175
21143132185
22143131195
23143130205
24133129206
25133129216
26143128226
27143027227
28143027227
29143026227
30153026237
31152926237

Wind in January

Winds average 6 km/h in January.

Across January, 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 January

DaylightNight

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

Days grow by about 12 minutes over January. Sunrise moves from 6:48 AM to 6:51 AM, and sunset from 5:49 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.06:485:49
211.06:485:49
311.06:485:50
411.06:495:50
511.06:495:51
611.06:495:51
711.06:505:52
811.06:505:53
911.16:505:53
1011.16:505:54
1111.16:515:54
1211.16:515:55
1311.16:515:56
1411.16:515:56
1511.16:515:57
1611.16:515:57
1711.16:515:58
1811.16:525:58
1911.16:525:59
2011.16:526:00
2111.16:526:00
2211.26:526:01
2311.26:526:01
2411.26:526:02
2511.26:526:02
2611.26:526:03
2711.26:516:04
2811.26:516:04
2911.26:516:05
3011.26:516:05
3111.26:516:06

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.81 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 — January's 4.81 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.1Bright
Planning a trip in January

Hazard calendar for Lom Sak

In seasonPeak

None of Lom Sak's seasonal hazards are active in January. 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 January a good time to visit Lom Sak?

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

5.7
Sightseeing
2nd-best month of the year
8.2
Beach & pool
2nd-best month of the year

January 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 January

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

In January, Lom Sak sees daytime highs around 31°C and nights near 18°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Lom Sak in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 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 January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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
January 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).