Weleri weather in January

In January, Weleri sees average daytime highs of 26°C and overnight lows near 23°C, with 490 mm of rain across 30.4 wet days and about 12.4 hours of daylight. It is the 11th-warmest and 2nd-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 January, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of January to 12 h 18 min by month's end. Set against the rest of the year, January is Weleri's 10th-clearest and 2nd-windiest month. For the whole year in context, see Weleri's year-round climate.

Daytime high
26°
11th warmest
Overnight low
23°
5th coldest
Rainfall
490 mm
30.4 wet days
Daylight
12 h 24 min
5:38 AM – 6:00 PM
Cloud cover
91%
10th clearest
Wind
11 km/h
2nd windiest
Solar energy
4.56 kWh/m²
Travel score
3.4
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

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

A typical January 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, January runs on par with December and on par with February.

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 January compares with the rest of the year at a glance. January is the 11th-warmest and 2nd-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 5% of January, with mostly cloudy or overcast conditions the remaining 94%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1595
2595
3793
4793
5793
6793
7793
8892
9892
10892
11892
12892
13793
14793
15793
16793
17793
18694
19694
20595
21496
22496
23496
24496
25397
26397
27397
28397
29397
30397
31298

Chance of precipitation in January

Any precipitation

Weleri gets around 490 mm of rain over 30.4 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 98% and peaks near 99% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
197
297
397
497
597
697
797
897
997
1097
1197
1298
1398
1498
1598
1698
1798
1899
1999
2099
2199
2299
2399
2499
2599
2699
2799
2899
2999
3099
3199

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 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
1496
2496
3595
4595
5595
6595
7595
8595
9694
10595
11595
12595
13595
14595
15595
16595
17595
18496
19496
20496
21496
22496
23496
24496
25496
26496
27496
28397
29397
30397
31397

Wind in January

Winds average 11 km/h in January.

Across January, daily wind ranges from about 9 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 12 h 24 min at the start of January to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over January. Sunrise moves from 5:31 AM to 5:44 AM, and sunset from 5:55 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:315:55
212.45:315:55
312.45:325:56
412.45:325:56
512.45:335:56
612.45:335:57
712.45:345:57
812.45:345:58
912.45:355:58
1012.45:355:58
1112.45:365:59
1212.45:365:59
1312.45:375:59
1412.45:375:59
1512.45:386:00
1612.45:386:00
1712.45:396:00
1812.45:396:00
1912.45:396:01
2012.45:406:01
2112.35:406:01
2212.35:416:01
2312.35:416:01
2412.35:416:02
2512.35:426:02
2612.35:426:02
2712.35:436:02
2812.35:436:02
2912.35:436:02
3012.35:446:02
3112.35:446:02

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.56 kWh/m² — the year's lowest.

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 — January's 4.56 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
314.4Bright
Planning a trip in January

Hazard calendar for Weleri

In seasonPeak

In January, 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 January a good time to visit Weleri?

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

3.4
Sightseeing
9th-best month of the year
3.3
Beach & pool
11th-best month of the year

January is a weaker month for outdoor sightseeing in Weleri.

What to pack for Weleri in January

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

In January, 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 January

The nearest coast averages about 29°C in January — 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 January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 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 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 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
January 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).