Santarém weather in December

In December, Santarém sees average daytime highs of 15°C and overnight lows near 8°C, with 77 mm of rain across 8.8 wet days and about 9.3 hours of daylight. It is the 11th-warmest and 3rd-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 35% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 24 min at the start of December to 9 h 18 min by month's end. Set against the rest of the year, December is Santarém's 12th-clearest and 9th-windiest month. For the whole year in context, see Santarém's year-round climate.

Daytime high: 15°; 11th warmest
Overnight low: 8°; 3rd coldest
Rainfall: 77 mm; 8.8 wet days
Daylight: 9 h 18 min; 7:53 AM – 5:08 PM
Cloud cover: 57%; 12th clearest
Wind: 12 km/h; 9th windiest
Solar energy: 1.94 kWh/m²
Travel score: 4.5; out of 10

Santarém is city seat of Santarém municipality.

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

← November Santarém 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 Santarém reaches about 15°C in the afternoon and slips back to 8°C overnight — a 7°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 3°C cooler than 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)	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	14	14	14	14	14
Avg low (°C)	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7

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

Santarém weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	14° / 7°	68	8.9	9.6	4.3
Feb	15° / 7°	51	6.9	10.5	5.1
Mar	18° / 9°	59	8.1	11.7	6.3
Apr	20° / 10°	58	8.5	13	6.6
May	23° / 13°	52	7.4	14.1	7.4
Jun	27° / 15°	12	2.7	14.7	8.1
Jul	29° / 17°	4	1	14.5	7.3
Aug	30° / 17°	7	1.6	13.5	6.9
Sep	27° / 16°	33	4.5	12.3	7.6
Oct	22° / 13°	79	9.2	11	6.9
Nov	17° / 10°	80	9.2	9.8	5.7
Dec	15° / 8°	77	8.8	9.3	4.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 54%.

	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 (%)	49	49	48	47	47	47	46	46	45	46	45	44	45	44	44	46	46	45	45	45	46	46	46	46	46	46	46	47	46	46	47
Cloudier (%)	51	51	52	53	53	53	54	54	55	54	55	56	55	56	56	54	54	55	55	55	54	54	54	54	54	54	54	53	54	54	53

	Clearer (%)	Cloudier (%)
1	49	51
2	49	51
3	48	52
4	47	53
5	47	53
6	47	53
7	46	54
8	46	54
9	45	55
10	46	54
11	45	55
12	44	56
13	45	55
14	44	56
15	44	56
16	46	54
17	46	54
18	45	55
19	45	55
20	45	55
21	46	54
22	46	54
23	46	54
24	46	54
25	46	54
26	46	54
27	46	54
28	47	53
29	46	54
30	46	54
31	47	53

Chance of precipitation in December

Any precipitation

Santarém gets around 77 mm of rain over 8.8 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 29% and peaks near 31% 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 (%)	28	28	27	27	27	27	27	27	27	27	27	28	28	29	29	29	30	30	30	30	30	31	31	31	31	31	31	31	31	31	31

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

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 92% 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 (%)	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	91	91	91	91	91
Comfortable (%)	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	9	9	9	9	9

	Dry (%)	Comfortable (%)
1	92	8
2	92	8
3	92	8
4	92	8
5	92	8
6	92	8
7	92	8
8	92	8
9	92	8
10	92	8
11	92	8
12	92	8
13	92	8
14	92	8
15	92	8
16	92	8
17	92	8
18	92	8
19	92	8
20	92	8
21	92	8
22	92	8
23	92	8
24	92	8
25	92	8
26	92	8
27	91	9
28	91	9
29	91	9
30	91	9
31	91	9

Wind in December

Winds average 12 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 12 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)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	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	calm

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

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 24 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 6 minutes over December. Sunrise moves from 7:41 AM to 8:00 AM, and sunset from 5:08 PM to 5:16 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)	9.4	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	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.3	9.3	9.3	9.3
Sunrise (AM)	7:41	7:42	7:43	7:44	7:45	7:46	7:47	7:47	7:48	7:49	7:50	7:51	7:51	7:52	7:53	7:53	7:54	7:55	7:55	7:56	7:56	7:57	7:57	7:58	7:58	7:58	7:59	7:59	7:59	7:59	8:00
Sunset (PM)	5:08	5:08	5:07	5:07	5:07	5:07	5:07	5:07	5:07	5:07	5:07	5:08	5:08	5:08	5:08	5:08	5:09	5:09	5:09	5:10	5:10	5:11	5:11	5:12	5:12	5:13	5:13	5:14	5:15	5:15	5:16

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.4	7:41	5:08
2	9.4	7:42	5:08
3	9.4	7:43	5:07
4	9.4	7:44	5:07
5	9.4	7:45	5:07
6	9.4	7:46	5:07
7	9.3	7:47	5:07
8	9.3	7:47	5:07
9	9.3	7:48	5:07
10	9.3	7:49	5:07
11	9.3	7:50	5:07
12	9.3	7:51	5:08
13	9.3	7:51	5:08
14	9.3	7:52	5:08
15	9.3	7:53	5:08
16	9.3	7:53	5:08
17	9.2	7:54	5:09
18	9.2	7:55	5:09
19	9.2	7:55	5:09
20	9.2	7:56	5:10
21	9.2	7:56	5:10
22	9.2	7:57	5:11
23	9.2	7:57	5:11
24	9.2	7:58	5:12
25	9.2	7:58	5:12
26	9.2	7:58	5:13
27	9.2	7:59	5:13
28	9.3	7:59	5:14
29	9.3	7:59	5:15
30	9.3	7:59	5:15
31	9.3	8:00	5:16

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.94 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.94 kWh/m² to a high of 7.57 kWh/m² in July across the year — December's 1.94 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	2.0	2.0	2.0	2.0	2.0	2.0	2.0	2.0	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim

	Solar energy (kWh/m²)	Level
1	2.1	Moderate
2	2.1	Moderate
3	2.1	Moderate
4	2.0	Moderate
5	2.0	Moderate
6	2.0	Moderate
7	2.0	Moderate
8	2.0	Dim
9	2.0	Dim
10	2.0	Dim
11	2.0	Dim
12	1.9	Dim
13	1.9	Dim
14	1.9	Dim
15	1.9	Dim
16	1.9	Dim
17	1.9	Dim
18	1.9	Dim
19	1.9	Dim
20	1.9	Dim
21	1.9	Dim
22	1.9	Dim
23	1.9	Dim
24	1.9	Dim
25	1.9	Dim
26	1.9	Dim
27	1.9	Dim
28	1.9	Dim
29	1.9	Dim
30	1.9	Dim
31	1.9	Dim

Planning a trip in December

Is December a good time to visit Santarém?

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

11th-best month of the year

December is a reasonable time to visit Santarém for sightseeing.

What to pack for Santarém in December

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

In December, Santarém sees daytime highs around 15°C and nights near 8°C. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Santarém in December

The nearest coast averages about 15°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 58 km away) is warmest in August at about 19°C and coldest in February near 14°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	14	14	15	16	18	18	19	19	18	17	15
Comfort	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool

	Sea temperature (°C)	Comfort
Jan	15	Bracing
Feb	14	Bracing
Mar	14	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	15	Cool

UV index in Santarém 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 Santarém peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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	2	2
Level	Low	Moderate	High	Very high	Very high	Very high	Very high	Very high	High	Moderate	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	Moderate
Nov	2	Moderate
Dec	2	Low

Location & terrain

Where is Santarém?

Santarém sits at 39.2°N, 8.7°W, 130 m above sea level, in Portugal. The nearest listed city is Azambuja, 24 km away.

Topography around Santarém

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

Within 3 km, the terrain around Santarém has only modest variations in elevation — a maximum elevation change of 115 m around an average of 33 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 167 m; within 80 km, large variations in elevation — a maximum elevation change of 674 m.

The land around Santarém is covered by grassland (29%), cropland (25%) and trees (22%) within 3 km, grassland (42%), cropland (28%) and trees (23%) within 16 km, and grassland (37%) and trees (36%) within 80 km.

3 km

115 m

grassland 29%

16 km

167 m

grassland 42%

80 km

674 m

grassland 37%

treesshrubsgrasslandcroplandartificial surfaceswater

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

December weather nearby: Azambuja 24 km · Monsanto 25 km · Torres Novas 30 km · Entroncamento 32 km · Vila Franca de Xira 41 km · Caldas da Rainha 43 km · Alcobaça 43 km · Tomar 47 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 Santarém (39.2338°, -8.6862°, elevation 130 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	8
2	15	8
3	15	8
4	15	8
5	15	8
6	15	8
7	15	8
8	15	8
9	15	8
10	15	8
11	15	8
12	15	8
13	15	8
14	15	8
15	15	8
16	15	8
17	15	7
18	14	7
19	14	7
20	14	7
21	14	7
22	14	7
23	14	7
24	14	7
25	14	7
26	14	7
27	14	7
28	14	7
29	14	7
30	14	7
31	14	7

	Clearer (%)	Cloudier (%)
1	49	51
2	49	51
3	48	52
4	47	53
5	47	53
6	47	53
7	46	54
8	46	54
9	45	55
10	46	54
11	45	55
12	44	56
13	45	55
14	44	56
15	44	56
16	46	54
17	46	54
18	45	55
19	45	55
20	45	55
21	46	54
22	46	54
23	46	54
24	46	54
25	46	54
26	46	54
27	46	54
28	47	53
29	46	54
30	46	54
31	47	53

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

	Dry (%)	Comfortable (%)
1	92	8
2	92	8
3	92	8
4	92	8
5	92	8
6	92	8
7	92	8
8	92	8
9	92	8
10	92	8
11	92	8
12	92	8
13	92	8
14	92	8
15	92	8
16	92	8
17	92	8
18	92	8
19	92	8
20	92	8
21	92	8
22	92	8
23	92	8
24	92	8
25	92	8
26	92	8
27	91	9
28	91	9
29	91	9
30	91	9
31	91	9

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

	Clearer (%)	Cloudier (%)
1	49	51
2	49	51
3	48	52
4	47	53
5	47	53
6	47	53
7	46	54
8	46	54
9	45	55
10	46	54
11	45	55
12	44	56
13	45	55
14	44	56
15	44	56
16	46	54
17	46	54
18	45	55
19	45	55
20	45	55
21	46	54
22	46	54
23	46	54
24	46	54
25	46	54
26	46	54
27	46	54
28	47	53
29	46	54
30	46	54
31	47	53

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

	Dry (%)	Comfortable (%)
1	92	8
2	92	8
3	92	8
4	92	8
5	92	8
6	92	8
7	92	8
8	92	8
9	92	8
10	92	8
11	92	8
12	92	8
13	92	8
14	92	8
15	92	8
16	92	8
17	92	8
18	92	8
19	92	8
20	92	8
21	92	8
22	92	8
23	92	8
24	92	8
25	92	8
26	92	8
27	91	9
28	91	9
29	91	9
30	91	9
31	91	9

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

	Clearer (%)	Cloudier (%)
1	49	51
2	49	51
3	48	52
4	47	53
5	47	53
6	47	53
7	46	54
8	46	54
9	45	55
10	46	54
11	45	55
12	44	56
13	45	55
14	44	56
15	44	56
16	46	54
17	46	54
18	45	55
19	45	55
20	45	55
21	46	54
22	46	54
23	46	54
24	46	54
25	46	54
26	46	54
27	46	54
28	47	53
29	46	54
30	46	54
31	47	53

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

	Dry (%)	Comfortable (%)
1	92	8
2	92	8
3	92	8
4	92	8
5	92	8
6	92	8
7	92	8
8	92	8
9	92	8
10	92	8
11	92	8
12	92	8
13	92	8
14	92	8
15	92	8
16	92	8
17	92	8
18	92	8
19	92	8
20	92	8
21	92	8
22	92	8
23	92	8
24	92	8
25	92	8
26	92	8
27	91	9
28	91	9
29	91	9
30	91	9
31	91	9