Poso weather in December

In December, Poso sees average daytime highs of 27°C and overnight lows near 21°C, with 345 mm of rain across 30.3 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 5th-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 0% of the time in December, and the air most often feels oppressive.

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

Daytime high: 27°; 8th warmest
Overnight low: 21°; 8th coldest
Rainfall: 345 mm; 30.3 wet days
Daylight: 12 h 06 min; 5:51 AM – 5:56 PM
Cloud cover: 94%; 12th clearest
Wind: 4 km/h; 11th windiest
Solar energy: 4.69 kWh/m²
Travel score: 3.3; out of 10

Poso is administrative seat of Poso Regency.

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

← November Poso year-round climate January →Best places to visit in December

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical December day in Poso reaches about 27°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, December runs on par with November and on par with January.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27
Avg low (°C)	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21

	Avg high (°C)	Avg low (°C)
1	27	21
2	27	21
3	27	21
4	27	21
5	27	21
6	27	21
7	27	21
8	27	21
9	27	21
10	27	21
11	27	21
12	27	21
13	27	21
14	27	21
15	27	21
16	27	21
17	27	21
18	27	21
19	27	21
20	27	21
21	27	21
22	27	21
23	27	21
24	27	21
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	27	21
31	27	21

Poso weather by month

How December compares with the rest of the year at a glance. December is the 8th-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	27° / 20°	278	27.4	12.1	3.6
Feb	27° / 20°	241	25	12	3.7
Mar	27° / 21°	360	28.6	12	3.5
Apr	27° / 21°	433	29.2	12	3.3
May	28° / 21°	354	29.2	11.9	3.5
Jun	27° / 21°	288	25.8	11.9	3.9
Jul	27° / 21°	204	22.6	11.9	4.5
Aug	28° / 21°	159	19.1	12	5.0
Sep	28° / 20°	165	17.6	12	4.7
Oct	28° / 21°	245	22.5	12	4.0
Nov	28° / 21°	350	28.2	12.1	3.5
Dec	27° / 21°	345	30.3	12.1	3.3

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 1% of December, with mostly cloudy or overcast conditions the remaining 99%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	0	0	0	0	0	0	0	1
Cloudier (%)	99	99	99	99	99	99	99	98	98	98	98	98	98	98	98	98	99	99	99	99	99	99	99	100	100	100	100	100	100	100	99

	Clearer (%)	Cloudier (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	1	99
7	1	99
8	2	98
9	2	98
10	2	98
11	2	98
12	2	98
13	2	98
14	2	98
15	2	98
16	2	98
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	0	100
25	0	100
26	0	100
27	0	100
28	0	100
29	0	100
30	0	100
31	1	99

Chance of precipitation in December

Any precipitation

Poso gets around 345 mm of rain over 30.3 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 97% and peaks near 98% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	97	97	97	97	97	97	97	96	96	96	96	95	95

	Rain chance (%)
1	98
2	98
3	98
4	98
5	98
6	98
7	98
8	98
9	98
10	98
11	98
12	98
13	98
14	98
15	98
16	98
17	98
18	98
19	97
20	97
21	97
22	97
23	97
24	97
25	97
26	96
27	96
28	96
29	96
30	95
31	95

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Muggy (%)	32	32	33	33	33	34	34	35	35	36	36	37	37	38	39	39	40	40	41	41	42	42	43	43	44	44	45	46	46	47	48
Oppressive (%)	68	68	67	67	67	66	66	65	65	64	64	63	63	62	61	61	60	60	59	59	58	58	57	57	56	56	55	54	54	53	52

	Muggy (%)	Oppressive (%)
1	32	68
2	32	68
3	33	67
4	33	67
5	33	67
6	34	66
7	34	66
8	35	65
9	35	65
10	36	64
11	36	64
12	37	63
13	37	63
14	38	62
15	39	61
16	39	61
17	40	60
18	40	60
19	41	59
20	41	59
21	42	58
22	42	58
23	43	57
24	43	57
25	44	56
26	44	56
27	45	55
28	46	54
29	46	54
30	47	53
31	48	52

Wind in December

Winds average 4 km/h in December.

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	4	calm
2	4	calm
3	4	calm
4	4	calm
5	4	calm
6	4	calm
7	4	calm
8	4	calm
9	4	calm
10	4	calm
11	4	calm
12	4	calm
13	4	calm
14	4	calm
15	4	calm
16	4	calm
17	4	calm
18	4	calm
19	4	calm
20	4	calm
21	4	calm
22	4	calm
23	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	4	calm
30	4	calm
31	4	calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 06 min at the start of December 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 December. Sunrise moves from 5:44 AM to 5:58 AM, and sunset from 5:49 PM to 6:03 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1
Sunrise (AM)	5:44	5:45	5:45	5:46	5:46	5:46	5:47	5:47	5:48	5:48	5:49	5:49	5:49	5:50	5:50	5:51	5:51	5:52	5:52	5:53	5:53	5:54	5:54	5:54	5:55	5:55	5:56	5:56	5:57	5:57	5:58
Sunset (PM)	5:49	5:49	5:50	5:50	5:51	5:51	5:51	5:52	5:52	5:53	5:53	5:54	5:54	5:55	5:55	5:56	5:56	5:56	5:57	5:57	5:58	5:58	5:59	5:59	6:00	6:00	6:01	6:01	6:02	6:02	6:03

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.1	5:44	5:49
2	12.1	5:45	5:49
3	12.1	5:45	5:50
4	12.1	5:46	5:50
5	12.1	5:46	5:51
6	12.1	5:46	5:51
7	12.1	5:47	5:51
8	12.1	5:47	5:52
9	12.1	5:48	5:52
10	12.1	5:48	5:53
11	12.1	5:49	5:53
12	12.1	5:49	5:54
13	12.1	5:49	5:54
14	12.1	5:50	5:55
15	12.1	5:50	5:55
16	12.1	5:51	5:56
17	12.1	5:51	5:56
18	12.1	5:52	5:56
19	12.1	5:52	5:57
20	12.1	5:53	5:57
21	12.1	5:53	5:58
22	12.1	5:54	5:58
23	12.1	5:54	5:59
24	12.1	5:54	5:59
25	12.1	5:55	6:00
26	12.1	5:55	6:00
27	12.1	5:56	6:01
28	12.1	5:56	6:01
29	12.1	5:57	6:02
30	12.1	5:57	6:02
31	12.1	5:58	6:03

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.69 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 — December's 4.69 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.8	Bright
2	4.8	Bright
3	4.8	Bright
4	4.8	Bright
5	4.8	Bright
6	4.8	Bright
7	4.8	Bright
8	4.8	Bright
9	4.8	Bright
10	4.8	Bright
11	4.8	Bright
12	4.8	Bright
13	4.8	Bright
14	4.8	Bright
15	4.7	Bright
16	4.7	Bright
17	4.7	Bright
18	4.7	Bright
19	4.7	Bright
20	4.7	Bright
21	4.7	Bright
22	4.7	Bright
23	4.7	Bright
24	4.7	Bright
25	4.7	Bright
26	4.7	Bright
27	4.7	Bright
28	4.7	Bright
29	4.7	Bright
30	4.7	Bright
31	4.7	Bright

Planning a trip in December

Is December a good time to visit Poso?

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

3.3

Sightseeing

11th-best month of the year

3.4

Beach & pool

12th-best month of the year

December is a weaker month for outdoor sightseeing in Poso.

What to pack for Poso in December

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

In December, Poso sees daytime highs around 27°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 30 days see rain.

light clothesrain gearsun protection

Sea temperature near Poso in December

The nearest coast averages about 30°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 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	30	29	30	30	30	30	30	30	30	30	30	30
Comfort	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical

	Sea temperature (°C)	Comfort
Jan	30	Tropical
Feb	29	Tropical
Mar	30	Tropical
Apr	30	Tropical
May	30	Tropical
Jun	30	Tropical
Jul	30	Tropical
Aug	30	Tropical
Sep	30	Tropical
Oct	30	Tropical
Nov	30	Tropical
Dec	30	Tropical

UV index in Poso in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	15	16	15	14	13	11	12	13	13	14	13	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	16	Extreme
Mar	15	Extreme
Apr	14	Extreme
May	13	Extreme
Jun	11	Extreme
Jul	12	Extreme
Aug	13	Extreme
Sep	13	Extreme
Oct	14	Extreme
Nov	13	Extreme
Dec	12	Extreme

Air quality in Poso 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 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).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	8	8	8	9	9	9	9	9	14	17	12	9
Level	Good	Good	Good	Good	Good	Good	Good	Good	Moderate	Moderate	Good	Good

	PM2.5 (µg/m³)	Level
Jan	8	Good
Feb	8	Good
Mar	8	Good
Apr	9	Good
May	9	Good
Jun	9	Good
Jul	9	Good
Aug	9	Good
Sep	14	Moderate
Oct	17	Moderate
Nov	12	Good
Dec	9	Good

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.

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

trees 65%

16 km

737 m

trees 52%

80 km

2,772 m

trees 65%

treesgrasslandcroplandartificial surfaceswatermangroves

← November Poso year-round climate January →Best places to visit in December

December 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

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).

	Avg high (°C)	Avg low (°C)
1	27	21
2	27	21
3	27	21
4	27	21
5	27	21
6	27	21
7	27	21
8	27	21
9	27	21
10	27	21
11	27	21
12	27	21
13	27	21
14	27	21
15	27	21
16	27	21
17	27	21
18	27	21
19	27	21
20	27	21
21	27	21
22	27	21
23	27	21
24	27	21
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	27	21
31	27	21

	Clearer (%)	Cloudier (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	1	99
7	1	99
8	2	98
9	2	98
10	2	98
11	2	98
12	2	98
13	2	98
14	2	98
15	2	98
16	2	98
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	0	100
25	0	100
26	0	100
27	0	100
28	0	100
29	0	100
30	0	100
31	1	99

	Rain chance (%)
1	98
2	98
3	98
4	98
5	98
6	98
7	98
8	98
9	98
10	98
11	98
12	98
13	98
14	98
15	98
16	98
17	98
18	98
19	97
20	97
21	97
22	97
23	97
24	97
25	97
26	96
27	96
28	96
29	96
30	95
31	95

	Muggy (%)	Oppressive (%)
1	32	68
2	32	68
3	33	67
4	33	67
5	33	67
6	34	66
7	34	66
8	35	65
9	35	65
10	36	64
11	36	64
12	37	63
13	37	63
14	38	62
15	39	61
16	39	61
17	40	60
18	40	60
19	41	59
20	41	59
21	42	58
22	42	58
23	43	57
24	43	57
25	44	56
26	44	56
27	45	55
28	46	54
29	46	54
30	47	53
31	48	52

	Avg high (°C)	Avg low (°C)
1	27	21
2	27	21
3	27	21
4	27	21
5	27	21
6	27	21
7	27	21
8	27	21
9	27	21
10	27	21
11	27	21
12	27	21
13	27	21
14	27	21
15	27	21
16	27	21
17	27	21
18	27	21
19	27	21
20	27	21
21	27	21
22	27	21
23	27	21
24	27	21
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	27	21
31	27	21

	Clearer (%)	Cloudier (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	1	99
7	1	99
8	2	98
9	2	98
10	2	98
11	2	98
12	2	98
13	2	98
14	2	98
15	2	98
16	2	98
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	0	100
25	0	100
26	0	100
27	0	100
28	0	100
29	0	100
30	0	100
31	1	99

	Rain chance (%)
1	98
2	98
3	98
4	98
5	98
6	98
7	98
8	98
9	98
10	98
11	98
12	98
13	98
14	98
15	98
16	98
17	98
18	98
19	97
20	97
21	97
22	97
23	97
24	97
25	97
26	96
27	96
28	96
29	96
30	95
31	95

	Muggy (%)	Oppressive (%)
1	32	68
2	32	68
3	33	67
4	33	67
5	33	67
6	34	66
7	34	66
8	35	65
9	35	65
10	36	64
11	36	64
12	37	63
13	37	63
14	38	62
15	39	61
16	39	61
17	40	60
18	40	60
19	41	59
20	41	59
21	42	58
22	42	58
23	43	57
24	43	57
25	44	56
26	44	56
27	45	55
28	46	54
29	46	54
30	47	53
31	48	52

	Avg high (°C)	Avg low (°C)
1	27	21
2	27	21
3	27	21
4	27	21
5	27	21
6	27	21
7	27	21
8	27	21
9	27	21
10	27	21
11	27	21
12	27	21
13	27	21
14	27	21
15	27	21
16	27	21
17	27	21
18	27	21
19	27	21
20	27	21
21	27	21
22	27	21
23	27	21
24	27	21
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	27	21
31	27	21

	Clearer (%)	Cloudier (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	1	99
7	1	99
8	2	98
9	2	98
10	2	98
11	2	98
12	2	98
13	2	98
14	2	98
15	2	98
16	2	98
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	0	100
25	0	100
26	0	100
27	0	100
28	0	100
29	0	100
30	0	100
31	1	99

	Rain chance (%)
1	98
2	98
3	98
4	98
5	98
6	98
7	98
8	98
9	98
10	98
11	98
12	98
13	98
14	98
15	98
16	98
17	98
18	98
19	97
20	97
21	97
22	97
23	97
24	97
25	97
26	96
27	96
28	96
29	96
30	95
31	95

	Muggy (%)	Oppressive (%)
1	32	68
2	32	68
3	33	67
4	33	67
5	33	67
6	34	66
7	34	66
8	35	65
9	35	65
10	36	64
11	36	64
12	37	63
13	37	63
14	38	62
15	39	61
16	39	61
17	40	60
18	40	60
19	41	59
20	41	59
21	42	58
22	42	58
23	43	57
24	43	57
25	44	56
26	44	56
27	45	55
28	46	54
29	46	54
30	47	53
31	48	52