Julau weather in December

In December, Julau sees average daytime highs of 30°C and overnight lows near 23°C, with 307 mm of rain across 28.7 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 1st-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 0% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of December to 11 h 54 min by month's end. Set against the rest of the year, December is Julau's 12th-clearest and 1st-windiest month. For the whole year in context, see Julau's year-round climate.

Daytime high
30°
10th warmest
Overnight low
23°
4th coldest
Rainfall
307 mm
28.7 wet days
Daylight
11 h 54 min
6:32 AM – 6:25 PM
Cloud cover
93%
12th clearest
Wind
4 km/h
1st windiest
Solar energy
3.91 kWh/m²
Travel score
2.7
out of 10

Julau is town in Malaysia.

Density
9/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

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 Julau 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 on par with 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
283023
293023
303023
313023

How December really feels in Julau

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.

Julau weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°30227.311.92.9
Feb30° / 23°23523.111.93.0
Mar31° / 23°22126.4122.8
Apr31° / 24°23026.7122.6
May31° / 24°20425.412.12.8
Jun31° / 24°16721.512.13.1
Jul31° / 23°1642012.13.3
Aug31° / 23°18421.512.13.1
Sep31° / 23°23724.7122.8
Oct30° / 23°25827.8122.7
Nov30° / 23°28128.311.92.6
Dec30° / 23°30728.711.92.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 2% of December, with mostly cloudy or overcast conditions the remaining 98%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1397
2397
3397
4397
5397
6397
7397
8397
9397
10397
11397
12397
13397
14397
15397
16298
17298
18298
19298
20298
21298
22298
23199
24199
25199
26199
27199
28199
29199
30199
31199

Chance of precipitation in December

Any precipitation

Julau gets around 307 mm of rain over 28.7 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 92% and peaks near 94% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
193
293
393
493
593
692
792
891
991
1091
1191
1291
1391
1491
1591
1691
1791
1892
1992
2093
2193
2293
2394
2494
2594
2694
2794
2893
2993
3093
3192

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
15842
25842
35842
45842
55941
65941
75941
86040
96040
106040
116040
126040
136040
146040
156040
166040
176040
185941
195941
205941
215941
225941
236040
246040
256139
266139
276238
286238
296337
306436
316436

Wind in December

Winds average 4 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 54 min at the start of December to 11 h 54 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 6:25 AM to 6:39 AM, and sunset from 6:19 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:256:19
211.96:266:19
311.96:266:20
411.96:276:20
511.96:276:20
611.96:276:21
711.96:286:21
811.96:286:22
911.96:296:22
1011.96:296:22
1111.96:306:23
1211.96:306:23
1311.96:316:24
1411.96:316:24
1511.96:326:25
1611.96:326:25
1711.96:326:25
1811.96:336:26
1911.96:336:26
2011.96:346:27
2111.96:346:27
2211.96:356:28
2311.96:356:28
2411.96:366:29
2511.96:366:29
2611.96:376:30
2711.96:376:30
2811.96:386:31
2911.96:386:31
3011.96:386:32
3111.96:396:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.91 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.91 kWh/m² to a high of 4.99 kWh/m² in August across the year — December's 3.91 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.0Bright
34.0Bright
44.0Bright
54.0Bright
64.0Bright
74.0Bright
84.0Bright
94.0Bright
104.0Bright
114.0Moderate
124.0Moderate
134.0Moderate
144.0Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.8Moderate
283.9Moderate
293.9Moderate
303.9Moderate
313.9Moderate
Planning a trip in December

Is December a good time to visit Julau?

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

2.7
Sightseeing
9th-best month of the year
3.7
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Julau.

What to pack for Julau in December

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

In December, Julau sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

UV index in Julau 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 Julau peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 15UV 15Jul 14UV 11
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar16Extreme
Apr15Extreme
May14Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct14Extreme
Nov12Extreme
Dec11Extreme

Air quality in Julau 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 Julau is worst in September — around 26 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodSep 1325 µg/m³Dec 1411 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Moderate
Mar13Moderate
Apr14Moderate
May13Moderate
Jun14Moderate
Jul16Moderate
Aug22Moderate
Sep26Moderate
Oct17Moderate
Nov11Good
Dec11Good
Location & terrain

Where is Julau?

Julau sits at 2.0°N, 111.9°E, 27 m above sea level, in Malaysia. The nearest listed city is Sibu Jaya, 26 km away.

Topography around Julau

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

Within 3 km, the terrain around Julau has only modest variations in elevation — a maximum elevation change of 114 m around an average of 42 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 249 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,241 m.

The land around Julau is covered by trees (98%) within 3 km, trees (99%) within 16 km, and trees (93%) within 80 km.

3 km
114 m
16 km
249 m
80 km
1,241 m
treesgrasslandartificial surfaceswatermangroves
December weather nearby: Sibu Jaya 26 km · Kanowit 28 km · Pakan 30 km · Sibu 33 km · Maradong 34 km · Sarikei 46 km · Saratok 72 km · Selangau 72 km

Malaysia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / G / M
230 V · 50 Hz
Prices
≈ 32% of US
price level, 2025
GDP per capita
$13,125
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
95%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
22.5
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 581
Religion
Muslim 64%Buddhist 19%Christian 9%Hindu 6%

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 Julau (2.0167°, 111.9167°, elevation 27 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).