São João da Talha weather in December

In December, São João da Talha sees average daytime highs of 15°C and overnight lows near 9°C, with 73 mm of rain across 8.9 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 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 São João da Talha's 12th-clearest and 8th-windiest month. For the whole year in context, see São João da Talha's year-round climate.

Daytime high
15°
11th warmest
Overnight low
3rd coldest
Rainfall
73 mm
8.9 wet days
Daylight
9 h 18 min
7:54 AM – 5:11 PM
Cloud cover
56%
12th clearest
Wind
13 km/h
8th windiest
Solar energy
2.01 kWh/m²
Travel score
4.6
out of 10

São João da Talha is human settlement in Portugal.

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

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 São João da Talha reaches about 15°C in the afternoon and slips back to 9°C overnight — a 6°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 on par with January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11610
2159
3159
4159
5159
6159
7159
8159
9159
10159
11159
12159
13159
14159
15159
16159
17159
18159
19159
20159
21159
22159
23159
24159
25159
26159
27159
28159
29159
30149
31148

São João da Talha 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 618.49.64.4
Feb15° / 47710.55.0
Mar18° / 10°517.611.76.2
Apr19° / 11°518.6136.5
May22° / 13°426.314.17.5
Jun25° / 16°102.414.78.5
Jul28° / 17°20.714.48.2
Aug28° / 17°5113.57.9
Sep26° / 16°284.412.38.0
Oct22° / 14°758.8117.0
Nov17° / 11°759.29.95.8
Dec15° / 738.99.34.6

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%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24852
34753
44753
54753
64753
74654
84555
94654
104555
114555
124555
134456
144555
154555
164555
174555
184555
194555
204753
214654
224654
234654
244753
254753
264654
274753
284753
294852
304852
314951

Chance of precipitation in December

Any precipitation

São João da Talha gets around 73 mm of rain over 8.9 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.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
328
428
528
627
727
827
928
1028
1128
1228
1329
1429
1529
1629
1729
1830
1930
2030
2130
2230
2330
2431
2531
2631
2731
2831
2931
3031
3131

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 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
187121
287121
387121
489110
589110
689110
789110
889110
989110
1089110
1189110
1289110
1389110
1489110
1589110
1689110
1789110
1890100
1990100
2089101
2189101
2289101
2389101
2489101
2589101
2689110
2789110
2889110
2989110
3089110
3188120

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light 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 5:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.57:425:11
29.57:435:10
39.47:445:10
49.47:445:10
59.47:455:10
69.47:465:10
79.47:475:10
89.47:485:10
99.47:495:10
109.37:495:10
119.37:505:10
129.37:515:10
139.37:525:11
149.37:525:11
159.37:535:11
169.37:545:11
179.37:545:12
189.37:555:12
199.37:565:12
209.37:565:13
219.37:575:13
229.37:575:14
239.37:575:14
249.37:585:15
259.37:585:15
269.37:595:16
279.37:595:16
289.37:595:17
299.38:005:18
309.38:005:18
319.38:005:19

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 7.63 kWh/m² in July across the year — December's 2.01 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.1Moderate
32.1Moderate
42.1Moderate
52.1Moderate
62.1Moderate
72.1Moderate
82.0Moderate
92.0Moderate
102.0Moderate
112.0Moderate
122.0Moderate
132.0Moderate
142.0Moderate
152.0Dim
162.0Dim
172.0Dim
182.0Dim
192.0Dim
202.0Dim
212.0Dim
222.0Dim
232.0Moderate
242.0Moderate
252.0Moderate
262.0Moderate
272.0Moderate
282.0Moderate
292.0Moderate
302.0Moderate
312.0Moderate
Planning a trip in December

Is December a good time to visit São João da Talha?

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

4.6
Sightseeing
11th-best month of the year
0.1
Beach & pool
11th-best month of the year

December is a reasonable time to visit São João da Talha for sightseeing.

What to pack for São João da Talha in December

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

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

a warm layerrain gear

Sea temperature near São João da Talha 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 33 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.

14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan15Cool
Feb15Bracing
Mar15Bracing
Apr15Cool
May16Cool
Jun18Cool
Jul18Cool
Aug19Cool
Sep19Cool
Oct18Cool
Nov17Cool
Dec16Cool

UV index in São João da Talha 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 São João da Talha 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 15UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar6High
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct5High
Nov3Moderate
Dec2Low
Location & terrain

Where is São João da Talha?

São João da Talha sits at 38.8°N, 9.1°W, 66 m above sea level, in Portugal. The nearest listed city is Santa Iria da Azóia, 2.0 km away.

Topography around São João da Talha

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São João da Talha.

Within 3 km, the terrain around São João da Talha has only modest variations in elevation — a maximum elevation change of 142 m around an average of 38 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 425 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.

The land around São João da Talha is covered by artificial surfaces (30%), grassland (27%) and water (20%) within 3 km, water (28%) and grassland (27%) within 16 km, and water (38%), grassland (31%) and trees (21%) within 80 km.

3 km
142 m
16 km
425 m
80 km
656 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Santa Iria da Azóia 2.0 km · Camarate 3.0 km · Sacavém 4.0 km · Moscavide e Portela 5.0 km · Póvoa de Santa Iria 5.0 km · Vialonga 6.0 km · Olivais 6.0 km · Parque das Nações 6.0 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
Catholic 68%not applicable 13%no religion 12%no response 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 São João da Talha (38.8238°, -9.0972°, elevation 66 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).