Weleri weather in December

In December, Weleri sees average daytime highs of 26°C and overnight lows near 23°C, with 570 mm of rain across 29.8 wet days and about 12.4 hours of daylight. It is the 7th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 1% 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 Weleri's 11th-clearest and 3rd-windiest month. For the whole year in context, see Weleri's year-round climate.

Daytime high
26°
7th warmest
Overnight low
23°
8th coldest
Rainfall
570 mm
29.8 wet days
Daylight
12 h 24 min
5:24 AM – 5:48 PM
Cloud cover
91%
11th clearest
Wind
7 km/h
3rd windiest
Solar energy
4.61 kWh/m²
Travel score
3.4
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical December day in Weleri reaches about 26°C in the afternoon and slips back to 23°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 27°C. Set against its neighbours, December runs on par with November and on par with January.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12623
22623
32623
42623
52623
62623
72623
82623
92623
102623
112623
122623
132623
142623
152623
162623
172623
182623
192623
202623
212623
222623
232623
242623
252623
262623
272623
282623
292623
302623
312623

Weleri weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 23°49030.412.43.4
Feb26° / 23°45727.612.23.4
Mar26° / 23°43830.3123.4
Apr27° / 23°31627.111.93.8
May27° / 24°13920.411.75.0
Jun26° / 23°9414.311.65.9
Jul26° / 23°6011.911.66.5
Aug26° / 23°4911.711.86.5
Sep26° / 23°7312.7126.2
Oct27° / 23°18819.512.25.0
Nov27° / 23°39827.312.33.8
Dec26° / 23°57029.812.43.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

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

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1694
2694
3694
4694
5694
6694
7694
8694
9694
10595
11595
12595
13595
14595
15595
16595
17496
18496
19496
20496
21496
22496
23496
24397
25397
26496
27496
28496
29496
30496
31595

Chance of precipitation in December

Any precipitation

Weleri gets around 570 mm of rain over 29.8 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 96% and peaks near 97% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
196
297
397
497
597
696
796
896
996
1096
1196
1296
1396
1496
1596
1696
1795
1895
1995
2095
2196
2296
2396
2496
2596
2696
2796
2897
2997
3097
3197

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 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
1397
2397
3397
4397
5397
6397
7397
8397
9397
10397
11397
12397
13397
14397
15397
16397
17397
18397
19397
20397
21397
22397
23397
24397
25397
26397
27397
28496
29496
30496
31496

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
289calm
299calm
309calm
319calm

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 5:18 AM to 5:31 AM, and sunset from 5:41 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:185:41
212.45:195:41
312.45:195:42
412.45:195:42
512.45:195:43
612.45:205:43
712.45:205:44
812.45:215:44
912.45:215:45
1012.45:215:45
1112.45:225:46
1212.45:225:46
1312.45:235:47
1412.45:235:47
1512.45:235:47
1612.45:245:48
1712.45:245:48
1812.45:255:49
1912.45:255:49
2012.45:265:50
2112.45:265:50
2212.45:275:51
2312.45:275:51
2412.45:275:52
2512.45:285:52
2612.45:285:53
2712.45:295:53
2812.45:295:54
2912.45:305:54
3012.45:305:54
3112.45:315:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.61 kWh/m².

For context, solar energy here swings from a low near 4.56 kWh/m² to a high of 6.07 kWh/m² in September across the year — December's 4.61 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in December

Hazard calendar for Weleri

In seasonPeak

In December, Weleri sits inside its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.

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

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

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

Is December a good time to visit Weleri?

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

3.4
Sightseeing
9th-best month of the year
3.4
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Weleri.

What to pack for Weleri in December

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

In December, Weleri sees daytime highs around 26°C and nights near 23°C. Pack rain gear. Worth having: light clothes and sun protection. About 30 days see rain.

rain gearlight clothessun protection

Sea temperature near Weleri in December

The nearest coast averages about 30°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in May at about 30°C and coldest in February near 29°C.

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

28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Weleri in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December 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 Weleri peaks around March 14 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 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 highExtremeVery highExtremeMar 14UV 14Nov 15UV 7
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar14Extreme
Apr11Extreme
May8Very high
Jun7Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct10Extreme
Nov6High
Dec12Extreme

Air quality in Weleri 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 Weleri is worst in May — around 45 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorMay 1445 µg/m³Feb 1131 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb30Moderate
Mar38Poor
Apr43Poor
May45Poor
Jun41Poor
Jul36Poor
Aug36Poor
Sep38Poor
Oct39Poor
Nov38Poor
Dec34Moderate
Location & terrain

Where is Weleri?

Weleri sits at 7.0°S, 110.1°E, 17 m above sea level, in Indonesia. The nearest listed city is Semarang, 39 km away.

Topography around Weleri

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

Within 3 km, the terrain around Weleri has only modest variations in elevation — a maximum elevation change of 220 m around an average of 30 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 757 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,293 m.

The land around Weleri is covered by cropland (40%), trees (37%) and artificial surfaces (21%) within 3 km, trees (46%), cropland (23%) and water (21%) within 16 km, and trees (49%) and water (31%) within 80 km.

3 km
220 m
16 km
757 m
80 km
3,293 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Semarang 39 km · Ungaran 42 km · Pekalongan 44 km · Kedungwuni 46 km · Wonosobo 47 km · Ambarawa 49 km · Wonopringgo 50 km · Mranggen 50 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 Weleri (-6.9713°, 110.0666°, elevation 17 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).