Poso weather in January

In January, Poso sees average daytime highs of 27°C and overnight lows near 20°C, with 278 mm of rain across 27.4 wet days and about 12.1 hours of daylight. It is the 12th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 1% of the time in January, and the air most often feels muggy.

Daylight stretches from about 12 h 06 min at the start of January to 12 h 06 min by month's end. Set against the rest of the year, January is Poso's 11th-clearest and 8th-windiest month. For the whole year in context, see Poso's year-round climate.

Daytime high
27°
12th warmest
Overnight low
20°
3rd coldest
Rainfall
278 mm
27.4 wet days
Daylight
12 h 06 min
6:04 AM – 6:08 PM
Cloud cover
93%
11th clearest
Wind
4 km/h
8th windiest
Solar energy
4.88 kWh/m²
Travel score
3.6
out of 10

Poso is administrative seat of Poso Regency.

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 27°C through the month.

A typical January day in Poso reaches about 27°C in the afternoon and slips back to 20°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, January runs on par with December and on par with February.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12721
22721
32721
42721
52721
62721
72721
82720
92720
102720
112720
122720
132720
142720
152720
162720
172720
182720
192720
202720
212720
222720
232720
242720
252720
262720
272720
282720
292720
302720
312720

Poso weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 20°27827.412.13.6
Feb27° / 20°24125123.7
Mar27° / 21°36028.6123.5
Apr27° / 21°43329.2123.3
May28° / 21°35429.211.93.5
Jun27° / 21°28825.811.93.9
Jul27° / 21°20422.611.94.5
Aug28° / 21°15919.1125.0
Sep28° / 20°16517.6124.7
Oct28° / 21°24522.5124.0
Nov28° / 21°35028.212.13.5
Dec27° / 21°34530.312.13.3

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 3% of January, with mostly cloudy or overcast conditions the remaining 97%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1199
2298
3298
4397
5397
6397
7397
8397
9496
10496
11496
12496
13496
14496
15496
16496
17496
18496
19496
20496
21496
22496
23496
24496
25397
26397
27397
28397
29397
30397
31397

Chance of precipitation in January

Any precipitation

Poso gets around 278 mm of rain over 27.4 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 89% and peaks near 95% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
195
294
394
493
593
692
792
891
991
1090
1190
1290
1389
1489
1588
1688
1788
1887
1987
2087
2187
2287
2386
2486
2586
2686
2787
2887
2987
3087
3188

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the muggy band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
104951
205050
305149
405248
505446
605545
705644
805743
905842
1005941
1106040
1206139
1306238
1406337
1506337
1606436
1706535
1806535
1906634
2006634
2116534
2216633
2316633
2416633
2516633
2616633
2716633
2816732
2916732
3016633
3116633

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 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 January

DaylightNight

Daylight runs from about 12 h 06 min at the start of January to 12 h 06 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 5:58 AM to 6:08 AM, and sunset from 6:03 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:586:03
212.15:586:03
312.15:596:03
412.15:596:04
512.16:006:04
612.16:006:05
712.16:006:05
812.16:016:06
912.16:016:06
1012.16:026:06
1112.16:026:07
1212.16:036:07
1312.16:036:07
1412.16:036:08
1512.16:046:08
1612.16:046:08
1712.16:046:09
1812.16:056:09
1912.16:056:09
2012.16:066:10
2112.16:066:10
2212.16:066:10
2312.16:066:11
2412.16:076:11
2512.16:076:11
2612.16:076:11
2712.16:086:11
2812.16:086:12
2912.16:086:12
3012.16:086:12
3112.16:086:12

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.88 kWh/m².

For context, solar energy here swings from a low near 4.3 kWh/m² to a high of 5.79 kWh/m² in September across the year — January's 4.88 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in January

Is January a good time to visit Poso?

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

3.6
Sightseeing
7th-best month of the year
3.7
Beach & pool
7th-best month of the year

January is a weaker month for outdoor sightseeing in Poso.

What to pack for Poso in January

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

In January, Poso sees daytime highs around 27°C and nights near 20°C. Pack rain gear. Worth having: light clothes and sun protection. About 27 days see rain.

rain gearlight clothessun protection

Sea temperature near Poso in January

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

The sea at the nearest coast (about 14 km away) is warmest in April 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
Jan30Tropical
Feb29Tropical
Mar30Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct30Tropical
Nov30Tropical
Dec30Tropical

UV index in Poso in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Poso peaks around February 19 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 19UV 16Jun 21UV 11
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct14Extreme
Nov13Extreme
Dec12Extreme

Air quality in Poso 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 Poso is worst in October — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (February, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodOct 1417 µg/m³Feb 108 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr9Good
May9Good
Jun9Good
Jul9Good
Aug9Good
Sep14Moderate
Oct17Moderate
Nov12Good
Dec9Good
Location & terrain

Where is Poso?

Poso sits at 1.4°S, 120.8°E, 10 m above sea level, in Indonesia. The nearest listed city is Palu, 112 km away.

Majene

Topography around Poso

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

Within 3 km, the terrain around Poso has only modest variations in elevation — a maximum elevation change of 229 m around an average of 47 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 737 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,772 m.

The land around Poso is covered by trees (65%) and water (20%) within 3 km, trees (52%) and water (43%) within 16 km, and trees (65%) and water (30%) within 80 km.

3 km
229 m
16 km
737 m
80 km
2,772 m
treesgrasslandcroplandartificial surfaceswatermangroves
January weather nearby: Palu 112 km · Masamba 137 km · Bungku 186 km · Palopo 188 km · Rantepao 199 km · Luwuk 232 km · Polewali 275 km · Majene 310 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 Poso (-1.3959°, 120.7524°, elevation 10 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).