Julau weather in January

In January, Julau sees average daytime highs of 30°C and overnight lows near 23°C, with 302 mm of rain across 27.3 wet days and about 11.9 hours of daylight. It is the 12th-warmest and 2nd-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 January, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of January to 11 h 54 min by month's end. Set against the rest of the year, January is Julau's 11th-clearest and 3rd-windiest month. For the whole year in context, see Julau's year-round climate.

Daytime high
30°
12th warmest
Overnight low
23°
4th coldest
Rainfall
302 mm
27.3 wet days
Daylight
11 h 54 min
6:45 AM – 6:38 PM
Cloud cover
92%
11th clearest
Wind
4 km/h
3rd windiest
Solar energy
4 kWh/m²
Travel score
2.9
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 January

Average highAverage lowShaded bands: 10–90% of days

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

A typical January 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 31°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)
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 January really feels in Julau

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.

Julau weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 2nd-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 3% of January, with mostly cloudy or overcast conditions the remaining 97%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1298
2397
3397
4397
5397
6397
7397
8397
9397
10397
11397
12397
13397
14397
15397
16298
17298
18397
19397
20397
21397
22397
23397
24397
25397
26496
27496
28496
29496
30496
31496

Chance of precipitation in January

Any precipitation

Julau gets around 302 mm of rain over 27.3 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 88% and peaks near 92% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
192
292
391
491
591
690
790
890
990
1090
1190
1289
1389
1489
1589
1689
1788
1888
1988
2087
2187
2287
2386
2486
2586
2686
2785
2885
2985
3084
3184

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 73% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
106535
206634
306634
406733
506832
606931
706931
807030
907129
1007129
1107228
1207228
1307327
1407327
1507426
1607426
1707525
1807525
1907525
2007624
2117524
2217524
2317524
2417623
2517623
2617623
2717623
2817722
2917722
3017722
3117821

Wind in January

Winds average 4 km/h in January.

Across January, daily wind ranges from about 4 km/h on the calmest days to 5 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
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 h 54 min at the start of January 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 January. Sunrise moves from 6:39 AM to 6:48 AM, and sunset from 6:32 PM to 6:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:396:32
211.96:396:33
311.96:406:33
411.96:406:33
511.96:416:34
611.96:416:34
711.96:416:35
811.96:426:35
911.96:426:36
1011.96:436:36
1111.96:436:36
1211.96:436:37
1311.96:446:37
1411.96:446:38
1511.96:446:38
1611.96:456:38
1711.96:456:39
1811.96:456:39
1911.96:466:40
2011.96:466:40
2111.96:466:40
2211.96:476:41
2311.96:476:41
2411.96:476:41
2511.96:476:41
2611.96:476:42
2711.96:486:42
2811.96:486:42
2911.96:486:43
3011.96:486:43
3111.96:486:43

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4 kWh/m².

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 — January's 4 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.9Moderate
144.0Moderate
154.0Moderate
164.0Moderate
174.0Moderate
184.0Moderate
194.0Moderate
204.0Bright
214.0Bright
224.0Bright
234.0Bright
244.0Bright
254.0Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.1Bright
314.1Bright
Planning a trip in January

Is January a good time to visit Julau?

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

2.9
Sightseeing
5th-best month of the year
4.0
Beach & pool
8th-best month of the year

January is a weaker month for outdoor sightseeing in Julau.

What to pack for Julau in January

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

In January, Julau sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 27 days see rain.

light clothesrain gear

UV index in Julau in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 14 (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 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 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
January 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).