Ranong weather in January

In January, Ranong sees average daytime highs of 30°C and overnight lows near 22°C, with 61 mm of rain across 7.6 wet days and about 11.5 hours of daylight. It is the 5th-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 31% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 11 h 24 min at the start of January to 11 h 36 min by month's end. Set against the rest of the year, January is Ranong's 3rd-clearest and 6th-windiest month. For the whole year in context, see Ranong's year-round climate.

Daytime high
30°
5th warmest
Overnight low
22°
1st coldest
Rainfall
61 mm
7.6 wet days
Daylight
11 h 30 min
6:50 AM – 6:19 PM
Cloud cover
58%
3rd clearest
Wind
9 km/h
6th windiest
Solar energy
5.22 kWh/m²
Travel score
5.1
out of 10

Ranong is town in Ranong province, Thailand.

Founded
1937

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 30°C through the month.

A typical January day in Ranong reaches about 30°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, January runs about 1°C warmer than December and about 2°C cooler than February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
63022
73022
83022
93022
103022
113022
123022
133022
143022
153022
163022
173122
183122
193122
203122
213122
223122
233122
243122
253122
263122
273122
283122
293122
303122
313122

How January really feels in Ranong

Once humidity and wind are folded in, January 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 January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Ranong weather by month

How January compares with the rest of the year at a glance. January is the 5th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°617.611.55.1
Feb32° / 22°33511.74.5
Mar33° / 23°10510.911.93.5
Apr33° / 24°18219.112.22.8
May31° / 24°27327.912.52.6
Jun30° / 24°2502612.63.0
Jul29° / 24°27027.512.53.0
Aug29° / 24°29227.812.33.0
Sep29° / 24°36128.112.12.9
Oct29° / 23°37328.311.83.0
Nov29° / 23°20121.211.53.7
Dec29° / 22°8611.511.45.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 21% of January, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34852
44852
54951
64951
74951
84951
95050
104951
114951
125050
135050
145050
155050
165050
175050
185050
195050
205149
215149
225248
235248
245347
255446
265545
275644
285644
295842
305941
316040

Chance of precipitation in January

Any precipitation

Ranong gets around 61 mm of rain over 7.6 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 24% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
126
226
325
425
525
625
724
824
924
1023
1123
1223
1323
1422
1522
1623
1723
1823
1923
2024
2124
2224
2325
2425
2525
2624
2724
2824
2923
3023
3122

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10630631
20529651
30529651
40528661
50428671
60428671
71428661
81428661
91428661
101428661
111429651
121429651
131430641
141431622
151432612
161433602
171434592
180435592
190436582
200436582
210437572
220438562
230438562
240438562
250438562
260438562
270438562
280438562
290438571
301438561
311438561

Wind in January

Winds average 9 km/h in January.

Across January, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 h 24 min at the start of January to 11 h 36 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 6:46 AM to 6:52 AM, and sunset from 6:11 PM to 6:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:466:11
211.46:466:12
311.46:476:12
411.46:476:13
511.46:476:13
611.46:486:14
711.46:486:15
811.46:486:15
911.46:496:16
1011.56:496:16
1111.56:496:17
1211.56:496:17
1311.56:506:18
1411.56:506:18
1511.56:506:19
1611.56:506:19
1711.56:516:20
1811.56:516:20
1911.56:516:20
2011.56:516:21
2111.56:516:21
2211.56:516:22
2311.56:526:22
2411.56:526:23
2511.56:526:23
2611.56:526:24
2711.56:526:24
2811.56:526:24
2911.56:526:25
3011.66:526:25
3111.66:526:26

Solar energy in January

Daily solar energy (kWh/m²)

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

For context, solar energy here swings from a low near 4.42 kWh/m² to a high of 6.27 kWh/m² in March across the year — January's 5.22 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.6Bright
315.6Bright
Planning a trip in January

Hazard calendar for Ranong

In seasonPeak

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

Ranong sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

Ranong's rainy season runs April–November, when most of the year's rain falls.

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

Is January a good time to visit Ranong?

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

5.1
Sightseeing
1st-best month of the year
7.1
Beach & pool
2nd-best month of the year

January is a reasonable time to visit Ranong for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ranong in January

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

In January, Ranong sees daytime highs around 30°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

Sea temperature near Ranong 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 30 km away) is warmest in April 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
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Ranong in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 Ranong peaks around August 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 20UV 13Nov 21UV 9
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct12Extreme
Nov9Very high
Dec10Very high

Air quality in Ranong 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 Ranong is worst in January — around 19 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJan 2318 µg/m³Oct 1613 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb18Moderate
Mar18Moderate
Apr18Moderate
May15Moderate
Jun14Moderate
Jul15Moderate
Aug13Moderate
Sep13Moderate
Oct13Moderate
Nov13Moderate
Dec14Moderate
Location & terrain

Where is Ranong?

Ranong sits at 10.0°N, 98.6°E, 38 m above sea level, in Thailand. The nearest listed city is Kawthaung, 9.0 km away.

Tha KhamSurat ThaniKo TaoKo SamuiBan Na San

Topography around Ranong

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

Within 3 km, the terrain around Ranong has significant variations in elevation — a maximum elevation change of 464 m around an average of 52 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,058 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,368 m.

The land around Ranong is covered by trees (59%) and artificial surfaces (26%) within 3 km, trees (63%) and water (23%) within 16 km, and trees (52%) and water (45%) within 80 km.

3 km
464 m
16 km
1,058 m
80 km
1,368 m
treesgrasslandcroplandartificial surfaceswatermangroves
January weather nearby: Kawthaung 9.0 km · Lang Suan 49 km · Chumphon 84 km · Tha Kham 115 km · Surat Thani 120 km · Ko Tao 132 km · Ko Samui 150 km · Ban Na San 152 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 Ranong (9.9658°, 98.6348°, elevation 38 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).