Diwek weather in December

In December, Diwek sees average daytime highs of 31°C and overnight lows near 24°C, with 266 mm of rain across 26.5 wet days and about 12.4 hours of daylight. It is the 5th-warmest and 4th-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 December, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of December to 12 h 24 min by month's end. Set against the rest of the year, December is Diwek's 10th-clearest and 4th-windiest month. For the whole year in context, see Diwek's year-round climate.

Daytime high
31°
5th warmest
Overnight low
24°
11th coldest
Rainfall
266 mm
26.5 wet days
Daylight
12 h 24 min
5:14 AM – 5:40 PM
Cloud cover
88%
10th clearest
Wind
5 km/h
4th windiest
Solar energy
4.69 kWh/m²
Travel score
2.6
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical December day in Diwek reaches about 31°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13224
23224
33224
43124
53124
63124
73124
83124
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293124
303124
313124

How December really feels in Diwek

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

Diwek weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 4th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 5% of December, with mostly cloudy or overcast conditions the remaining 93%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11189
21189
31090
41090
5991
6991
7991
8892
9892
10892
11793
12793
13694
14694
15694
16694
17694
18595
19595
20694
21694
22694
23694
24595
25595
26694
27694
28793
29793
30793
31892

Chance of precipitation in December

Any precipitation

Diwek gets around 266 mm of rain over 26.5 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 85% and peaks near 88% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
182
283
384
485
585
686
787
887
988
1088
1188
1288
1387
1487
1587
1686
1786
1885
1985
2084
2184
2283
2383
2483
2583
2684
2784
2884
2985
3085
3186

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 82% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
148115
248016
338116
438116
538116
638116
738017
838017
928117
1028117
1128117
1228216
1328216
1418316
1518316
1618316
1718316
1818316
1918316
2018316
2118316
2218316
2318316
2418316
2528216
2628216
2728216
2828216
2928315
3028315
3128315

Wind in December

Winds average 5 km/h in December.

Across December, 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
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

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

Days grow by about 0 minutes over December. Sunrise moves from 5:09 AM to 5:21 AM, and sunset from 5:33 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:095:33
212.45:095:34
312.45:095:34
412.45:095:35
512.45:105:35
612.45:105:35
712.45:105:36
812.45:115:36
912.45:115:37
1012.45:125:37
1112.45:125:38
1212.45:125:38
1312.45:135:39
1412.45:135:39
1512.45:145:40
1612.45:145:40
1712.45:155:41
1812.45:155:41
1912.45:155:42
2012.45:165:42
2112.45:165:43
2212.45:175:43
2312.45:175:44
2412.45:185:44
2512.45:185:45
2612.45:195:45
2712.45:195:46
2812.45:205:46
2912.45:205:46
3012.45:215:47
3112.45:215:47

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.69 kWh/m².

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 — December's 4.69 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in December

Hazard calendar for Diwek

In seasonPeak

In December, 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 December a good time to visit Diwek?

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

2.6
Sightseeing
9th-best month of the year
3.9
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Diwek.

What to pack for Diwek in December

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

In December, Diwek sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

UV index in Diwek in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (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 December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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
December 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).