Gresik weather in January

In January, Gresik sees average daytime highs of 31°C and overnight lows near 25°C, with 280 mm of rain across 29.4 wet days and about 12.4 hours of daylight. It is the 11th-warmest and 1st-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 2% of the time in January, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of January to 12 h 18 min by month's end. Set against the rest of the year, January is Gresik's 11th-clearest and 2nd-windiest month. For the whole year in context, see Gresik's year-round climate.

Daytime high
31°
11th warmest
Overnight low
25°
5th coldest
Rainfall
280 mm
29.4 wet days
Daylight
12 h 24 min
5:27 AM – 5:50 PM
Cloud cover
87%
11th clearest
Wind
9 km/h
2nd windiest
Solar energy
5.01 kWh/m²
Travel score
2.4
out of 10

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 Gresik reaches about 31°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°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)
13126
23126
33126
43126
53126
63126
73126
83126
93126
103126
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233125
243125
253125
263125
273125
283125
293125
303125
313125

How January really feels in Gresik

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.

Gresik weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 25°28029.412.42.4
Feb31° / 25°26127.112.22.4
Mar31° / 26°26828.9122.4
Apr32° / 26°1862411.82.8
May32° / 26°8614.611.73.7
Jun31° / 26°49911.64.5
Jul31° / 25°224.511.65.2
Aug31° / 25°61.511.85.3
Sep32° / 25°203.3124.5
Oct33° / 26°7312.512.23.3
Nov32° / 26°17924.212.32.5
Dec31° / 26°27428.712.42.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 8% of January, with mostly cloudy or overcast conditions the remaining 90%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1991
2991
31090
41090
51189
61288
71288
81288
91288
101288
111288
121288
131288
141288
151288
161288
171288
181189
191189
201090
21991
22991
23991
24892
25892
26694
27694
28694
29694
30694
31694

Chance of precipitation in January

Any precipitation

Gresik gets around 280 mm of rain over 29.4 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 95% and peaks near 98% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
192
292
392
492
592
692
792
892
992
1092
1193
1293
1393
1493
1594
1694
1794
1895
1995
2096
2196
2297
2397
2498
2598
2698
2798
2898
2998
3098
3197

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the miserable band about 86% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
11684
21585
31684
41684
51684
61684
71684
81684
91684
101684
111684
121684
131684
141684
151684
161684
171585
181585
191486
201486
211387
221387
231387
241288
251288
261288
271288
281288
291288
301288
311387

Wind in January

Winds average 9 km/h in January.

Across January, daily wind ranges from about 8 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
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 12 h 24 min at the start of January to 12 h 18 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 5:20 AM to 5:33 AM, and sunset from 5:45 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:205:45
212.45:215:45
312.45:215:46
412.45:225:46
512.45:225:46
612.45:235:47
712.45:235:47
812.45:245:47
912.45:245:48
1012.45:255:48
1112.45:255:48
1212.45:265:49
1312.45:265:49
1412.45:275:49
1512.45:275:50
1612.45:275:50
1712.45:285:50
1812.45:285:50
1912.45:295:51
2012.45:295:51
2112.45:305:51
2212.45:305:51
2312.35:305:51
2412.35:315:51
2512.35:315:52
2612.35:325:52
2712.35:325:52
2812.35:325:52
2912.35:335:52
3012.35:335:52
3112.35:335:52

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.01 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 5.01 kWh/m² to a high of 6.73 kWh/m² in September across the year — January's 5.01 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in January

Hazard calendar for Gresik

In seasonPeak

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

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

Gresik'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 Gresik?

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

2.4
Sightseeing
9th-best month of the year
3.6
Beach & pool
11th-best month of the year

January is a weaker month for outdoor sightseeing in Gresik.

What to pack for Gresik in January

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

In January, Gresik sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.

light clothesrain gearsun protection

Sea temperature near Gresik 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 31 km away) is warmest in November at about 30°C and coldest in August 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
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug28Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec29Tropical

UV index in Gresik 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 Gresik peaks around March 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 16 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 17UV 13Jun 16UV 8
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun7Very high
Jul9Very high
Aug11Extreme
Sep13Extreme
Oct11Extreme
Nov10Extreme
Dec11Extreme

Air quality in Gresik 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 Gresik is worst in May — around 101 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyMay 13101 µg/m³Aug 2267 µg/m³
PM2.5 (µg/m³)Level
Jan76Unhealthy
Feb71Unhealthy
Mar87Unhealthy
Apr99Unhealthy
May101Unhealthy
Jun95Unhealthy
Jul81Unhealthy
Aug66Unhealthy
Sep69Unhealthy
Oct80Unhealthy
Nov87Unhealthy
Dec81Unhealthy
Location & terrain

Where is Gresik?

Gresik sits at 7.2°S, 112.7°E, 10 m above sea level, in Indonesia. The nearest listed city is Kebomas, 3.0 km away.

Topography around Gresik

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

Within 3 km, the terrain around Gresik has only modest variations in elevation — a maximum elevation change of 113 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 114 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,306 m.

The land around Gresik is covered by water (45%) and artificial surfaces (37%) within 3 km, water (37%) and artificial surfaces (21%) within 16 km, and water (42%), trees (24%) and cropland (24%) within 80 km.

3 km
113 m
16 km
114 m
80 km
3,306 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
January weather nearby: Kebomas 3.0 km · Kamal 7.0 km · Bangkalan 15 km · Surabaya 15 km · Driyorejo 24 km · Lamongan 27 km · Gedangan 27 km · Krian 30 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 Gresik (-7.1539°, 112.6561°, elevation 10 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).