Mersing weather in January

In January, Mersing sees average daytime highs of 28°C and overnight lows near 25°C, with 282 mm of rain across 22.5 wet days and about 11.9 hours of daylight. It is the 12th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 4% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of January to 11 h 54 min by month's end. Set against the rest of the year, January is Mersing's 9th-clearest and 1st-windiest month. For the whole year in context, see Mersing's year-round climate.

Daytime high
28°
12th warmest
Overnight low
25°
2nd coldest
Rainfall
282 mm
22.5 wet days
Daylight
11 h 54 min
7:18 AM – 7:10 PM
Cloud cover
83%
9th clearest
Wind
15 km/h
1st windiest
Solar energy
4.58 kWh/m²
Travel score
4.3
out of 10

Mersing is town in Johor and district capital of Mersing District.

Founded
1977

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 28°C through the month.

A typical January day in Mersing reaches about 28°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, January runs on par with December and on par with February.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12825
22825
32825
42825
52825
62825
72825
82825
92825
102825
112825
122825
132825
142825
152825
162825
172825
182825
192825
202825
212825
222825
232825
242825
252825
262825
272825
282825
292825
302825
312825

How January really feels in Mersing

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.

Mersing weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°28222.511.94.3
Feb29° / 25°12417.111.94.4
Mar29° / 25°17122.1123.7
Apr30° / 25°17125.112.13.0
May31° / 26°16726.812.12.8
Jun30° / 25°13724.312.13.1
Jul30° / 25°1342412.13.3
Aug30° / 25°14925.912.13.1
Sep30° / 25°16925.7123.0
Oct30° / 25°23027.111.93.0
Nov29° / 25°36628.811.92.9
Dec28° / 25°41927.411.93.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 86%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11189
21288
31288
41387
51486
61486
71486
81585
91585
101684
111684
121684
131585
141585
151486
161486
171486
181387
191387
201387
211387
221387
231288
241288
251288
261387
271387
281387
291585
301585
311684

Chance of precipitation in January

Any precipitation

Mersing gets around 282 mm of rain over 22.5 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 73% and peaks near 83% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
183
283
383
482
581
681
780
879
978
1077
1176
1275
1374
1473
1571
1670
1769
1869
1968
2067
2167
2267
2367
2467
2568
2668
2768
2868
2968
3068
3167

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the oppressive band about 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
127325
227325
327325
427424
527424
627523
727523
827622
927622
1037621
1137621
1237720
1337720
1447620
1547719
1657619
1757619
1857619
1957619
2067519
2167519
2267519
2367519
2467420
2567420
2667420
2767420
2867420
2957520
3057520
3157520

Wind in January

Winds average 15 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 h 54 min at the start of January to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over January. Sunrise moves from 7:12 AM to 7:21 AM, and sunset from 7:04 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.97:127:04
211.97:127:04
311.97:137:05
411.97:137:05
511.97:147:05
611.97:147:06
711.97:147:06
811.97:157:07
911.97:157:07
1011.97:167:08
1111.97:167:08
1211.97:167:09
1311.97:177:09
1411.97:177:09
1511.97:177:10
1611.97:187:10
1711.97:187:11
1811.97:187:11
1911.97:197:11
2011.97:197:12
2111.97:197:12
2211.97:197:12
2311.97:207:13
2411.97:207:13
2511.97:207:13
2611.97:207:13
2711.97:217:14
2811.97:217:14
2911.97:217:14
3011.97:217:15
3111.97:217:15

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.58 kWh/m².

For context, solar energy here swings from a low near 4.01 kWh/m² to a high of 5.59 kWh/m² in March across the year — January's 4.58 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.3Bright
54.3Bright
64.3Bright
74.4Bright
84.4Bright
94.4Bright
104.5Bright
114.5Bright
124.5Bright
134.6Bright
144.6Bright
154.6Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.9Bright
Planning a trip in January

Hazard calendar for Mersing

In seasonPeak

In January, Mersing sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

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

Mersing's rainy season runs October–January, when most of the year's rain falls.

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

Is January a good time to visit Mersing?

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

4.3
Sightseeing
2nd-best month of the year
4.6
Beach & pool
3rd-best month of the year

January is a reasonable time to visit Mersing for sightseeing.

What to pack for Mersing in January

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

In January, Mersing sees daytime highs around 28°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near Mersing in January

The nearest coast averages about 28°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 km away) is warmest in May at about 30°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
Jan28Warm
Feb28Warm
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Mersing in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mersing peaks around February 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeFeb 21UV 15Jul 11UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Very high
Aug13Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Mersing 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 Mersing is worst in September — around 33 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (January, 12 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1633 µg/m³Jan 1912 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar15Moderate
Apr20Moderate
May24Moderate
Jun25Moderate
Jul28Moderate
Aug29Moderate
Sep33Moderate
Oct28Moderate
Nov17Moderate
Dec13Moderate
Location & terrain

Where is Mersing?

Mersing sits at 2.4°N, 103.8°E, 8 m above sea level, in Malaysia. The nearest listed city is Tioman, 54 km away.

Topography around Mersing

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

Within 3 km, the terrain around Mersing has only modest variations in elevation — a maximum elevation change of 92 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 270 m; within 80 km, large variations in elevation — a maximum elevation change of 1,017 m.

The land around Mersing is covered by trees (42%) and water (39%) within 3 km, trees (55%) and water (40%) within 16 km, and water (52%) and trees (46%) within 80 km.

3 km
92 m
16 km
270 m
80 km
1,017 m
treesgrasslandartificial surfacesbare terrainwater
January weather nearby: Tioman 54 km · Bandar Tenggara 67 km · Kampung Batu Empat 73 km · Kluang 73 km · Kota Tinggi 77 km · Kampung Sedenak 87 km · Simpang Renggam 89 km · Kampung Simpang Renggam 90 km

Malaysia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / G / M
230 V · 50 Hz
Prices
≈ 32% of US
price level, 2025
GDP per capita
$13,125
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
95%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
22.5
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 581
Religion
Muslim 64%Buddhist 19%Christian 9%Hindu 6%

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 Mersing (2.4312°, 103.8405°, elevation 8 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).