Grogol weather in December

In December, Grogol sees average daytime highs of 30°C and overnight lows near 23°C, with 313 mm of rain across 26.7 wet days and about 12.4 hours of daylight. It is the 10th-warmest and 4th-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 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 Grogol's 11th-clearest and 6th-windiest month. For the whole year in context, see Grogol's year-round climate.

Daytime high
30°
10th warmest
Overnight low
23°
9th coldest
Rainfall
313 mm
26.7 wet days
Daylight
12 h 24 min
5:20 AM – 5:46 PM
Cloud cover
90%
11th clearest
Wind
6 km/h
6th windiest
Solar energy
4.61 kWh/m²
Travel score
2.9
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical December day in Grogol 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 32°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)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283022
293022
303022
313022

How December really feels in Grogol

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.

Grogol weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°35427.912.42.9
Feb30° / 22°35327.212.22.7
Mar30° / 23°32028.112.12.8
Apr30° / 23°22325.411.83.0
May30° / 23°10716.611.74.1
Jun30° / 22°5910.311.64.8
Jul30° / 21°386.711.65.3
Aug30° / 21°193.811.85.5
Sep31° / 22°405.8124.8
Oct31° / 22°12114.712.23.8
Nov31° / 23°24224.312.32.9
Dec30° / 23°31326.712.42.9

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 94%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1793
2793
3793
4694
5694
6694
7694
8595
9595
10595
11595
12496
13496
14496
15496
16496
17496
18595
19595
20595
21595
22694
23694
24694
25694
26694
27694
28694
29793
30793
31793

Chance of precipitation in December

Any precipitation

Grogol gets around 313 mm of rain over 26.7 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 86% and peaks near 89% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
187
287
388
488
588
688
789
889
989
1089
1188
1288
1388
1488
1587
1687
1787
1886
1985
2085
2184
2284
2383
2483
2583
2683
2784
2884
2984
3084
3184

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 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
1595
2595
3595
4595
5595
6595
7496
8496
9496
10496
11496
12496
13496
14595
15595
16595
17595
18595
19595
20694
21694
22694
23694
24694
25694
26694
27694
28595
29595
30595
31595

Wind in December

Winds average 6 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
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

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 5:14 AM to 5:27 AM, and sunset from 5:39 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:145:39
212.45:145:39
312.45:155:40
412.45:155:40
512.45:155:41
612.45:165:41
712.45:165:42
812.45:165:42
912.45:175:43
1012.45:175:43
1112.45:185:44
1212.45:185:44
1312.45:185:45
1412.45:195:45
1512.45:195:46
1612.45:205:46
1712.45:205:47
1812.45:215:47
1912.45:215:48
2012.45:215:48
2112.45:225:48
2212.45:225:49
2312.45:235:49
2412.45:235:50
2512.45:245:50
2612.45:245:51
2712.45:255:51
2812.45:255:52
2912.45:265:52
3012.45:265:53
3112.45:275:53

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 5.94 kWh/m² in September across the year — December'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
64.6Bright
74.6Bright
84.6Bright
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 Grogol

In seasonPeak

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

Grogol'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 Grogol?

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

2.9
Sightseeing
8th-best month of the year
4.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Grogol.

What to pack for Grogol in December

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

In December, Grogol sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Grogol in December

The nearest coast averages about 29°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 62 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 Grogol 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 Grogol peaks around March 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 14 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 highExtremeVery highExtremeMar 13UV 14Jun 14UV 7
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar14Extreme
Apr12Extreme
May8Very high
Jun7Very high
Jul9Very high
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov9Very high
Dec11Extreme

Air quality in Grogol 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 Grogol is worst in May — around 54 µg/m³ PM2.5 (poor), about 1.7× the cleanest month (September, 32 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorMay 1254 µg/m³Sep 1333 µg/m³
PM2.5 (µg/m³)Level
Jan43Poor
Feb43Poor
Mar49Poor
Apr52Poor
May54Poor
Jun47Poor
Jul40Poor
Aug34Moderate
Sep32Moderate
Oct36Poor
Nov39Poor
Dec39Poor
Location & terrain

Where is Grogol?

Grogol sits at 7.6°S, 110.8°E, 93 m above sea level, in Indonesia. The nearest listed city is Baki, 4.0 km away.

Topography around Grogol

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

Within 3 km, the terrain around Grogol has only modest variations in elevation — a maximum elevation change of 19 m around an average of 92 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 125 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,224 m.

The land around Grogol is covered by artificial surfaces (59%) and cropland (20%) within 3 km, cropland (40%), artificial surfaces (30%) and trees (26%) within 16 km, and trees (62%) and cropland (23%) within 80 km.

3 km
19 m
16 km
125 m
80 km
3,224 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Baki 4.0 km · Surakarta 5.0 km · Jaten 9.0 km · Kartasura 10 km · Colomadu 11 km · Ngemplak 13 km · Gatak 13 km · Delanggu 15 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 Grogol (-7.6011°, 110.8186°, elevation 93 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. 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).