Belém weather in December

In December, Belém sees average daytime highs of 15°C and overnight lows near 11°C, with 79 mm of rain across 9.4 wet days and about 9.3 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 15°C through the month. The sky is clear or mostly clear about 34% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 30 min at the start of December to 9 h 18 min by month's end. Set against the rest of the year, December is Belém's 12th-clearest and 7th-windiest month. For the whole year in context, see Belém's year-round climate.

Daytime high: 15°; 10th warmest
Overnight low: 11°; 3rd coldest
Rainfall: 79 mm; 9.4 wet days
Daylight: 9 h 18 min; 7:54 AM – 5:12 PM
Cloud cover: 56%; 12th clearest
Wind: 17 km/h; 7th windiest
Solar energy: 2.01 kWh/m²
Travel score: 4.5; out of 10

← November Belém 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 15°C through the month.

A typical December day in Belém reaches about 15°C in the afternoon and slips back to 11°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 17°C. Set against its neighbours, December runs about 2°C cooler than November and about 1°C warmer than 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)	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	14	14	14	14	14	14	14	14	14
Avg low (°C)	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	10	10	10	10	10	10	10

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

Belém weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	14° / 10°	68	8.9	9.6	4.2
Feb	15° / 10°	51	7.5	10.5	4.6
Mar	16° / 11°	53	8.1	11.7	5.5
Apr	17° / 12°	51	8.4	13	6.0
May	19° / 14°	42	5.9	14.1	7.1
Jun	22° / 16°	10	2.1	14.7	8.4
Jul	24° / 18°	2	0.6	14.4	9.3
Aug	24° / 18°	4	1	13.5	9.2
Sep	23° / 17°	29	4.1	12.3	8.3
Oct	20° / 16°	77	8.9	11	6.7
Nov	17° / 13°	82	10.2	9.9	5.5
Dec	15° / 11°	79	9.4	9.3	4.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 52%.

	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 (%)	47	47	47	47	47	47	47	46	46	46	47	46	46	46	46	47	47	47	47	47	48	49	49	48	49	49	50	50	50	51	51
Cloudier (%)	53	53	53	53	53	53	53	54	54	54	53	54	54	54	54	53	53	53	53	53	52	51	51	52	51	51	50	50	50	49	49

	Clearer (%)	Cloudier (%)
1	47	53
2	47	53
3	47	53
4	47	53
5	47	53
6	47	53
7	47	53
8	46	54
9	46	54
10	46	54
11	47	53
12	46	54
13	46	54
14	46	54
15	46	54
16	47	53
17	47	53
18	47	53
19	47	53
20	47	53
21	48	52
22	49	51
23	49	51
24	48	52
25	49	51
26	49	51
27	50	50
28	50	50
29	50	50
30	51	49
31	51	49

Chance of precipitation in December

Any precipitation

Belém gets around 79 mm of rain over 9.4 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 31% and peaks near 33% 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 (%)	32	32	31	31	30	30	30	29	29	29	29	30	30	30	30	30	30	31	31	31	31	31	32	32	32	32	32	33	33	33	33

	Rain chance (%)
1	32
2	32
3	31
4	31
5	30
6	30
7	30
8	29
9	29
10	29
11	29
12	30
13	30
14	30
15	30
16	30
17	30
18	31
19	31
20	31
21	31
22	31
23	32
24	32
25	32
26	32
27	32
28	33
29	33
30	33
31	33

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 87% of days. It rarely turns muggy — the humid and sticky bands barely register.

	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
Dry (%)	84	85	86	86	86	86	86	86	86	86	86	86	86	86	86	86	87	87	87	88	88	88	88	88	88	88	88	88	88	88	88
Comfortable (%)	15	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	13	13	13	12	12	12	12	12	12	12	12	12	12	12	12
Humid (%)	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)	Humid (%)
1	84	15	1
2	85	14	1
3	86	14	0
4	86	14	0
5	86	14	0
6	86	14	0
7	86	14	0
8	86	14	0
9	86	14	0
10	86	14	0
11	86	14	0
12	86	14	0
13	86	14	0
14	86	14	0
15	86	14	0
16	86	14	0
17	87	13	0
18	87	13	0
19	87	13	0
20	88	12	0
21	88	12	0
22	88	12	0
23	88	12	0
24	88	12	0
25	88	12	0
26	88	12	0
27	88	12	0
28	88	12	0
29	88	12	0
30	88	12	0
31	88	12	0

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 17 km/h on the calmest days to 17 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)	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

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

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 30 min at the start of December to 9 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:42 AM to 8:00 AM, and sunset from 5:11 PM to 5:20 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)	9.5	9.5	9.5	9.4	9.4	9.4	9.4	9.4	9.4	9.4	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3
Sunrise (AM)	7:42	7:43	7:44	7:45	7:45	7:46	7:47	7:48	7:49	7:50	7:50	7:51	7:52	7:52	7:53	7:54	7:54	7:55	7:56	7:56	7:57	7:57	7:57	7:58	7:58	7:59	7:59	7:59	8:00	8:00	8:00
Sunset (PM)	5:11	5:11	5:11	5:11	5:11	5:11	5:11	5:11	5:11	5:11	5:11	5:11	5:11	5:12	5:12	5:12	5:12	5:13	5:13	5:14	5:14	5:14	5:15	5:15	5:16	5:17	5:17	5:18	5:18	5:19	5:20

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.5	7:42	5:11
2	9.5	7:43	5:11
3	9.5	7:44	5:11
4	9.4	7:45	5:11
5	9.4	7:45	5:11
6	9.4	7:46	5:11
7	9.4	7:47	5:11
8	9.4	7:48	5:11
9	9.4	7:49	5:11
10	9.4	7:50	5:11
11	9.3	7:50	5:11
12	9.3	7:51	5:11
13	9.3	7:52	5:11
14	9.3	7:52	5:12
15	9.3	7:53	5:12
16	9.3	7:54	5:12
17	9.3	7:54	5:12
18	9.3	7:55	5:13
19	9.3	7:56	5:13
20	9.3	7:56	5:14
21	9.3	7:57	5:14
22	9.3	7:57	5:14
23	9.3	7:57	5:15
24	9.3	7:58	5:15
25	9.3	7:58	5:16
26	9.3	7:59	5:17
27	9.3	7:59	5:17
28	9.3	7:59	5:18
29	9.3	8:00	5:18
30	9.3	8:00	5:19
31	9.3	8:00	5:20

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.01 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.01 kWh/m² to a high of 7.59 kWh/m² in July across the year — December's 2.01 kWh/m² sits near the bottom.

	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)	2.1	2.1	2.1	2.1	2.1	2.1	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.1	Moderate
2	2.1	Moderate
3	2.1	Moderate
4	2.1	Moderate
5	2.1	Moderate
6	2.1	Moderate
7	2.0	Moderate
8	2.0	Moderate
9	2.0	Moderate
10	2.0	Moderate
11	2.0	Moderate
12	2.0	Moderate
13	2.0	Moderate
14	2.0	Dim
15	2.0	Dim
16	2.0	Dim
17	2.0	Dim
18	2.0	Dim
19	2.0	Dim
20	2.0	Dim
21	2.0	Dim
22	2.0	Dim
23	2.0	Dim
24	2.0	Moderate
25	2.0	Moderate
26	2.0	Moderate
27	2.0	Moderate
28	2.0	Moderate
29	2.0	Moderate
30	2.0	Moderate
31	2.0	Moderate

Planning a trip in December

Is December a good time to visit Belém?

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

4.5

Sightseeing

11th-best month of the year

0.0

Beach & pool

10th-best month of the year

December is a reasonable time to visit Belém for sightseeing.

What to pack for Belém in December

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

In December, Belém sees daytime highs around 15°C and nights near 11°C. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Belém in December

The nearest coast averages about 16°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 18 km away) is warmest in September at about 19°C and coldest in February near 15°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	15	15	15	15	16	18	18	19	19	18	17	16
Comfort	Cool	Bracing	Bracing	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool

	Sea temperature (°C)	Comfort
Jan	15	Cool
Feb	15	Bracing
Mar	15	Bracing
Apr	15	Cool
May	16	Cool
Jun	18	Cool
Jul	18	Cool
Aug	19	Cool
Sep	19	Cool
Oct	18	Cool
Nov	17	Cool
Dec	16	Cool

UV index in Belém in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Belém peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	6	8	7	9	9	9	6	5	3	2
Level	Low	Moderate	High	Very high	Very high	Very high	Very high	Very high	High	High	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	6	High
Apr	8	Very high
May	7	Very high
Jun	9	Very high
Jul	9	Very high
Aug	9	Very high
Sep	6	High
Oct	5	High
Nov	3	Moderate
Dec	2	Low

Location & terrain

Where is Belém?

Belém sits at 38.7°N, 9.2°W, 13 m above sea level, in Portugal. The nearest listed city is Alcântara, 2.0 km away.

Topography around Belém

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

Within 3 km, the terrain around Belém has only modest variations in elevation — a maximum elevation change of 192 m around an average of 45 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 356 m; within 80 km, large variations in elevation — a maximum elevation change of 651 m.

The land around Belém is covered by water (35%), artificial surfaces (32%) and trees (25%) within 3 km, water (36%) and artificial surfaces (29%) within 16 km, and water (41%) and grassland (29%) within 80 km.

3 km

192 m

water 35%

16 km

356 m

water 36%

80 km

651 m

water 41%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

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

December weather nearby: Alcântara 2.0 km · Algés 3.0 km · Campo De Ourique 3.0 km · Almada 4.0 km · Buraca 4.0 km · Caparica 4.0 km · Alfragide 4.0 km · Piedade 4.0 km

Portugal travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / E / F; 230 V · 50 Hz
Prices: ≈ 60% of US; price level, 2025
GDP per capita: $32,082; 2025
Happiness: 6.0 / 10; World Happiness, 2025
Safe drinking water: 95%; of population, 2024
Homicide rate: 0.7; per 100k, 2022
Road deaths: 8.2; per 100k/yr, 2019
Income group: High; World Bank
English: Very high; EF EPI 612
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 Belém (38.6987°, -9.1929°, elevation 13 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. 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	15	11
2	15	11
3	15	11
4	15	11
5	15	11
6	15	11
7	15	11
8	15	11
9	15	11
10	15	11
11	15	11
12	15	11
13	15	11
14	15	11
15	15	11
16	15	11
17	15	11
18	15	11
19	15	11
20	15	11
21	15	11
22	15	11
23	14	11
24	14	11
25	14	10
26	14	10
27	14	10
28	14	10
29	14	10
30	14	10
31	14	10

	Clearer (%)	Cloudier (%)
1	47	53
2	47	53
3	47	53
4	47	53
5	47	53
6	47	53
7	47	53
8	46	54
9	46	54
10	46	54
11	47	53
12	46	54
13	46	54
14	46	54
15	46	54
16	47	53
17	47	53
18	47	53
19	47	53
20	47	53
21	48	52
22	49	51
23	49	51
24	48	52
25	49	51
26	49	51
27	50	50
28	50	50
29	50	50
30	51	49
31	51	49

	Rain chance (%)
1	32
2	32
3	31
4	31
5	30
6	30
7	30
8	29
9	29
10	29
11	29
12	30
13	30
14	30
15	30
16	30
17	30
18	31
19	31
20	31
21	31
22	31
23	32
24	32
25	32
26	32
27	32
28	33
29	33
30	33
31	33

	Dry (%)	Comfortable (%)	Humid (%)
1	84	15	1
2	85	14	1
3	86	14	0
4	86	14	0
5	86	14	0
6	86	14	0
7	86	14	0
8	86	14	0
9	86	14	0
10	86	14	0
11	86	14	0
12	86	14	0
13	86	14	0
14	86	14	0
15	86	14	0
16	86	14	0
17	87	13	0
18	87	13	0
19	87	13	0
20	88	12	0
21	88	12	0
22	88	12	0
23	88	12	0
24	88	12	0
25	88	12	0
26	88	12	0
27	88	12	0
28	88	12	0
29	88	12	0
30	88	12	0
31	88	12	0

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

	Clearer (%)	Cloudier (%)
1	47	53
2	47	53
3	47	53
4	47	53
5	47	53
6	47	53
7	47	53
8	46	54
9	46	54
10	46	54
11	47	53
12	46	54
13	46	54
14	46	54
15	46	54
16	47	53
17	47	53
18	47	53
19	47	53
20	47	53
21	48	52
22	49	51
23	49	51
24	48	52
25	49	51
26	49	51
27	50	50
28	50	50
29	50	50
30	51	49
31	51	49

	Rain chance (%)
1	32
2	32
3	31
4	31
5	30
6	30
7	30
8	29
9	29
10	29
11	29
12	30
13	30
14	30
15	30
16	30
17	30
18	31
19	31
20	31
21	31
22	31
23	32
24	32
25	32
26	32
27	32
28	33
29	33
30	33
31	33

	Dry (%)	Comfortable (%)	Humid (%)
1	84	15	1
2	85	14	1
3	86	14	0
4	86	14	0
5	86	14	0
6	86	14	0
7	86	14	0
8	86	14	0
9	86	14	0
10	86	14	0
11	86	14	0
12	86	14	0
13	86	14	0
14	86	14	0
15	86	14	0
16	86	14	0
17	87	13	0
18	87	13	0
19	87	13	0
20	88	12	0
21	88	12	0
22	88	12	0
23	88	12	0
24	88	12	0
25	88	12	0
26	88	12	0
27	88	12	0
28	88	12	0
29	88	12	0
30	88	12	0
31	88	12	0

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

	Clearer (%)	Cloudier (%)
1	47	53
2	47	53
3	47	53
4	47	53
5	47	53
6	47	53
7	47	53
8	46	54
9	46	54
10	46	54
11	47	53
12	46	54
13	46	54
14	46	54
15	46	54
16	47	53
17	47	53
18	47	53
19	47	53
20	47	53
21	48	52
22	49	51
23	49	51
24	48	52
25	49	51
26	49	51
27	50	50
28	50	50
29	50	50
30	51	49
31	51	49

	Rain chance (%)
1	32
2	32
3	31
4	31
5	30
6	30
7	30
8	29
9	29
10	29
11	29
12	30
13	30
14	30
15	30
16	30
17	30
18	31
19	31
20	31
21	31
22	31
23	32
24	32
25	32
26	32
27	32
28	33
29	33
30	33
31	33

	Dry (%)	Comfortable (%)	Humid (%)
1	84	15	1
2	85	14	1
3	86	14	0
4	86	14	0
5	86	14	0
6	86	14	0
7	86	14	0
8	86	14	0
9	86	14	0
10	86	14	0
11	86	14	0
12	86	14	0
13	86	14	0
14	86	14	0
15	86	14	0
16	86	14	0
17	87	13	0
18	87	13	0
19	87	13	0
20	88	12	0
21	88	12	0
22	88	12	0
23	88	12	0
24	88	12	0
25	88	12	0
26	88	12	0
27	88	12	0
28	88	12	0
29	88	12	0
30	88	12	0
31	88	12	0