Trenggalek weather in January

In January, Trenggalek sees average daytime highs of 30°C and overnight lows near 23°C, with 364 mm of rain across 28.8 wet days and about 12.4 hours of daylight. It is the 6th-warmest and 1st-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 1% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of January to 12 h 24 min by month's end. Set against the rest of the year, January is Trenggalek's 10th-clearest and 9th-windiest month. For the whole year in context, see Trenggalek's year-round climate.

Daytime high
30°
6th warmest
Overnight low
23°
9th coldest
Rainfall
364 mm
28.8 wet days
Daylight
12 h 24 min
5:30 AM – 5:55 PM
Cloud cover
91%
10th clearest
Wind
4 km/h
9th windiest
Solar energy
4.53 kWh/m²
Travel score
2.8
out of 10

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 Trenggalek reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, January runs on par with December and on par with February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123022
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How January really feels in Trenggalek

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.

Trenggalek weather by month

How January compares with the rest of the year at a glance. January is the 6th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°36428.812.42.8
Feb30° / 22°3512712.32.7
Mar30° / 23°33628.712.12.8
Apr30° / 23°23026.211.83.0
May29° / 22°11218.411.64.3
Jun29° / 21°7113.511.55.1
Jul28° / 20°429.611.66.3
Aug28° / 20°287.711.76.5
Sep29° / 21°539.9125.5
Oct29° / 22°1231912.24.1
Nov30° / 23°27226.212.43.0
Dec30° / 23°36028.212.52.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 4% of January, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1595
2694
3694
4694
5694
6793
7793
8793
9793
10793
11793
12793
13793
14793
15694
16694
17694
18595
19595
20496
21496
22397
23397
24397
25298
26298
27298
28298
29298
30298
31298

Chance of precipitation in January

Any precipitation

Trenggalek gets around 364 mm of rain over 28.8 wet days in January, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 93% and peaks near 98% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
191
291
391
491
591
690
790
890
990
1090
1190
1290
1390
1490
1591
1691
1791
1892
1993
2093
2194
2295
2395
2496
2596
2697
2797
2897
2997
3098
3198

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 98% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
13970
23970
32980
42980
52980
62980
72980
82980
92980
101990
111990
121990
131990
141990
151990
161981
171981
181981
191981
201981
211990
221990
231990
2401000
2501000
2601000
2701000
2801000
2901000
3001000
3101000

Wind in January

Winds average 4 km/h in January.

Across January, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 12 h 30 min at the start of January to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over January. Sunrise moves from 5:22 AM to 5:36 AM, and sunset from 5:50 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:225:50
212.55:235:51
312.55:235:51
412.55:245:51
512.55:245:52
612.55:255:52
712.55:255:52
812.45:265:53
912.45:265:53
1012.45:275:53
1112.45:275:54
1212.45:285:54
1312.45:285:54
1412.45:295:55
1512.45:295:55
1612.45:305:55
1712.45:305:55
1812.45:315:56
1912.45:315:56
2012.45:325:56
2112.45:325:56
2212.45:325:56
2312.45:335:56
2412.45:335:57
2512.45:345:57
2612.45:345:57
2712.45:345:57
2812.45:355:57
2912.45:355:57
3012.45:365:57
3112.45:365:57

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.53 kWh/m².

For context, solar energy here swings from a low near 4.53 kWh/m² to a high of 5.7 kWh/m² in October across the year — January's 4.53 kWh/m² sits near the bottom.

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
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
314.4Bright
Planning a trip in January

Hazard calendar for Trenggalek

In seasonPeak

In January, Trenggalek sits inside its cyclone and monsoon season. The full year is below, with each hazard's peak months called out.

Trenggalek sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Trenggalek's monsoon runs November–April, when most of the year's rain falls.

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

Is January a good time to visit Trenggalek?

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

2.8
Sightseeing
9th-best month of the year
3.8
Beach & pool
10th-best month of the year

January is a weaker month for outdoor sightseeing in Trenggalek.

What to pack for Trenggalek in January

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

In January, Trenggalek sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.

light clothesrain gearsun protection

Sea temperature near Trenggalek in January

The nearest coast averages about 29°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 34 km away) is warmest in March at about 29°C and coldest in August near 25°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug25Warm
Sep25Warm
Oct26Warm
Nov28Warm
Dec29Tropical

UV index in Trenggalek in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Trenggalek peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 16 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 14UV 15Jun 16UV 7
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May10Very high
Jun7High
Jul10Very high
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov10Extreme
Dec13Extreme

Air quality in Trenggalek 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 Trenggalek is worst in April — around 34 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 2133 µg/m³Sep 1723 µg/m³
PM2.5 (µg/m³)Level
Jan25Moderate
Feb25Moderate
Mar29Moderate
Apr34Moderate
May33Moderate
Jun31Moderate
Jul27Moderate
Aug24Moderate
Sep23Moderate
Oct24Moderate
Nov25Moderate
Dec23Moderate
Location & terrain

Where is Trenggalek?

Trenggalek sits at 8.1°S, 111.7°E, 113 m above sea level, in Indonesia. The nearest listed city is Boyolangu, 21 km away.

Topography around Trenggalek

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

Within 3 km, the terrain around Trenggalek has significant variations in elevation — a maximum elevation change of 347 m around an average of 128 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 973 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,227 m.

The land around Trenggalek is covered by trees (49%) and cropland (31%) within 3 km, trees (80%) within 16 km, and trees (52%) and water (25%) within 80 km.

3 km
347 m
16 km
973 m
80 km
3,227 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Boyolangu 21 km · Tulungagung 22 km · Kedungwaru 23 km · Ngunut 34 km · Ponorogo 35 km · Kediri 45 km · Gampengrejo 50 km · Blitar 51 km

Indonesia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,060
2025
Happiness
5.6 / 10
World Happiness, 2025
Safe drinking water
30%
of population, 2024
Homicide rate
0.3
per 100k, 2022
Road deaths
11.3
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 471
Religion
Muslim 87%Protestant 8%Roman Catholic 3%Hindu 2%

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 Trenggalek (-8.0764°, 111.7064°, elevation 113 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).