Diwek weather in January

In January, Diwek sees average daytime highs of 31°C and overnight lows near 23°C, with 286 mm of rain across 28.3 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 oppressive.

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 Diwek's 11th-clearest and 4th-windiest month. For the whole year in context, see Diwek's year-round climate.

Daytime high
31°
11th warmest
Overnight low
23°
10th coldest
Rainfall
286 mm
28.3 wet days
Daylight
12 h 24 min
5:28 AM – 5:52 PM
Cloud cover
89%
11th clearest
Wind
5 km/h
4th windiest
Solar energy
4.61 kWh/m²
Travel score
2.6
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 Diwek reaches about 31°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 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)
13124
23124
33124
43124
53124
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253023
263023
273023
283023
293023
303023
313023

How January really feels in Diwek

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.

Diwek 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° / 23°28628.312.42.6
Feb31° / 23°27826.712.22.5
Mar31° / 23°2762812.12.6
Apr31° / 23°20224.511.82.9
May31° / 23°8915.211.73.9
Jun31° / 22°538.811.64.6
Jul31° / 21°285.611.64.9
Aug32° / 21°133.311.84.9
Sep32° / 22°235124.2
Oct33° / 23°861212.23.4
Nov32° / 24°18321.412.32.7
Dec31° / 24°26626.512.42.6

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 6% of January, with mostly cloudy or overcast conditions the remaining 92%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1991
2991
31090
41090
51090
6991
7991
8991
9991
101090
111090
121090
131090
141090
151090
16991
17991
18991
19991
20892
21793
22793
23793
24694
25694
26595
27595
28595
29595
30496
31496

Chance of precipitation in January

Any precipitation

Diwek gets around 286 mm of rain over 28.3 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 91% and peaks near 97% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
186
286
387
487
587
687
787
887
987
1088
1188
1288
1389
1489
1589
1690
1791
1891
1992
2093
2194
2294
2395
2496
2596
2696
2797
2897
2997
3097
3197

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 87% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
128414
228414
328513
418613
518613
618712
718712
818712
918712
1018811
1118811
1218811
1318811
1418811
1518811
1608911
1708911
1808911
1908911
2008911
2108812
2208812
2308812
2408812
2508713
2608713
2708713
2808713
2908713
3008614
3108614

Wind in January

Winds average 5 km/h in January.

Across January, daily wind ranges from about 5 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
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

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 5:21 AM to 5:34 AM, and sunset from 5:47 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:215:47
212.45:225:48
312.45:225:48
412.45:235:48
512.45:235:49
612.45:245:49
712.45:245:50
812.45:255:50
912.45:255:50
1012.45:265:51
1112.45:265:51
1212.45:275:51
1312.45:275:51
1412.45:285:52
1512.45:285:52
1612.45:285:52
1712.45:295:52
1812.45:295:53
1912.45:305:53
2012.45:305:53
2112.45:315:53
2212.45:315:53
2312.45:315:54
2412.45:325:54
2512.45:325:54
2612.45:335:54
2712.45:335:54
2812.35:335:54
2912.35:345:54
3012.35:345:54
3112.35:345:54

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.61 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.61 kWh/m² to a high of 6.36 kWh/m² in September across the year — January's 4.61 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in January

Hazard calendar for Diwek

In seasonPeak

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

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

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

Is January a good time to visit Diwek?

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

2.6
Sightseeing
9th-best month of the year
3.8
Beach & pool
11th-best month of the year

January is a weaker month for outdoor sightseeing in Diwek.

What to pack for Diwek in January

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

In January, Diwek sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 28 days see rain.

light clothesrain gearsun protection

UV index in Diwek in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Diwek peaks around March 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highVery highExtremeExtremeMar 18UV 13Jun 15UV 7
UV index (midday)Level
Jan12Extreme
Feb10Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun7High
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov10Very high
Dec11Extreme

Air quality in Diwek 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 Diwek 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 Diwek?

Diwek sits at 7.6°S, 112.2°E, 53 m above sea level, in Indonesia. The nearest listed city is Jombang, 4.0 km away.

Topography around Diwek

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

Within 3 km, the terrain around Diwek has only modest variations in elevation — a maximum elevation change of 24 m around an average of 51 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 236 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,305 m.

The land around Diwek is covered by cropland (42%), artificial surfaces (29%) and trees (28%) within 3 km, cropland (60%) and trees (20%) within 16 km, and trees (47%) and cropland (34%) within 80 km.

3 km
24 m
16 km
236 m
80 km
3,305 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Jombang 4.0 km · Ngoro 12 km · Mojoagung 13 km · Kertosono 14 km · Pare 21 km · Soko 24 km · Mojokerto 26 km · Gampengrejo 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 Diwek (-7.579°, 112.2311°, elevation 53 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).