Viana do Castelo weather in January

In January, Viana do Castelo sees average daytime highs of 13°C and overnight lows near 7°C, with 218 mm of rain across 13.6 wet days and about 9.3 hours of daylight. It is the 12th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 13°C through the month. The sky is clear or mostly clear about 32% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 hours at the start of January to 9 h 42 min by month's end. Set against the rest of the year, January is Viana do Castelo's 11th-clearest and 1st-windiest month. For the whole year in context, see Viana do Castelo's year-round climate.

Daytime high: 13°; 12th warmest
Overnight low: 7°; 1st coldest
Rainfall: 218 mm; 13.6 wet days
Daylight: 9 h 18 min; 8:06 AM – 5:23 PM
Cloud cover: 59%; 11th clearest
Wind: 14 km/h; 1st windiest
Solar energy: 1.85 kWh/m²
Travel score: 3.3; out of 10

Viana do Castelo is city seat of Viana do Castelo municipality in northern Portugal and seat of the municipality and district of the same name.

Air quality: Excellent; PM10 9.1 µg/m³ · 2013

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

← December Viana do Castelo year-round climate February →Best places to visit in January

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 13°C through the month.

A typical January day in Viana do Castelo reaches about 13°C in the afternoon and slips back to 7°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 15°C. Set against its neighbours, January runs on par with December and about 1°C cooler than February.

	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)	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13
Avg low (°C)	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7

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

Viana do Castelo weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	13° / 7°	218	13.6	9.3	3.3
Feb	14° / 7°	142	10.4	10.3	3.9
Mar	15° / 8°	165	11.3	11.7	4.7
Apr	17° / 10°	154	13	13.1	5.0
May	19° / 12°	133	11.8	14.3	5.9
Jun	21° / 14°	56	6.9	15	7.2
Jul	23° / 16°	32	4.4	14.7	8.4
Aug	24° / 16°	45	5	13.7	8.3
Sep	22° / 15°	89	7.4	12.3	7.3
Oct	19° / 13°	232	13.2	10.9	5.7
Nov	15° / 10°	232	14.2	9.6	4.3
Dec	13° / 8°	227	14.1	9	3.5

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 11% of January, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to open up as the month goes on.

	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 (%)	40	40	40	40	40	40	41	41	41	42	41	42	42	43	43	43	43	43	44	45	45	45	47	47	47	47	48	48	48	48	48
Cloudier (%)	60	60	60	60	60	60	59	59	59	58	59	58	58	57	57	57	57	57	56	55	55	55	53	53	53	53	52	52	52	52	52

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	40	60
5	40	60
6	40	60
7	41	59
8	41	59
9	41	59
10	42	58
11	41	59
12	42	58
13	42	58
14	43	57
15	43	57
16	43	57
17	43	57
18	43	57
19	44	56
20	45	55
21	45	55
22	45	55
23	47	53
24	47	53
25	47	53
26	47	53
27	48	52
28	48	52
29	48	52
30	48	52
31	48	52

Chance of precipitation in January

Any precipitation

Viana do Castelo gets around 218 mm of rain over 13.6 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 44% and peaks near 51% on the wettest days. The odds ease toward the end of the month.

	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 (%)	50	50	51	50	50	50	50	49	49	49	48	48	47	47	46	45	44	43	43	42	41	40	39	38	38	37	37	36	36	37	37

	Rain chance (%)
1	50
2	50
3	51
4	50
5	50
6	50
7	50
8	49
9	49
10	49
11	48
12	48
13	47
14	47
15	46
16	45
17	44
18	43
19	43
20	42
21	41
22	40
23	39
24	38
25	38
26	37
27	37
28	36
29	36
30	37
31	37

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the dry band about 97% 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 (%)	95	95	95	96	96	96	96	96	97	97	97	97	97	98	98	98	98	98	98	98	98	98	98	98	98	99	99	99	99	99	99
Comfortable (%)	5	5	5	4	4	4	4	4	3	3	3	3	3	2	2	2	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1

	Dry (%)	Comfortable (%)
1	95	5
2	95	5
3	95	5
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	97	3
10	97	3
11	97	3
12	97	3
13	97	3
14	98	2
15	98	2
16	98	2
17	98	2
18	98	2
19	98	2
20	98	2
21	98	2
22	98	2
23	98	2
24	98	2
25	98	2
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

Wind in January

Winds average 14 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 13 km/h on the calmest days to 14 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)	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13
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	14	light breeze
2	14	light breeze
3	14	light breeze
4	14	light breeze
5	14	light breeze
6	14	light breeze
7	14	light breeze
8	14	light breeze
9	14	light breeze
10	14	light breeze
11	14	light breeze
12	14	light breeze
13	14	light breeze
14	14	light breeze
15	14	light breeze
16	14	light breeze
17	13	light breeze
18	13	light breeze
19	13	light breeze
20	13	light breeze
21	13	light breeze
22	13	light breeze
23	13	light breeze
24	13	light breeze
25	13	light breeze
26	13	light breeze
27	13	light breeze
28	13	light breeze
29	13	light breeze
30	13	light breeze
31	13	light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 hours at the start of January to 9 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over January. Sunrise moves from 8:08 AM to 7:56 AM, and sunset from 5:09 PM to 5:41 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)	9.0	9.0	9.0	9.1	9.1	9.1	9.1	9.1	9.1	9.2	9.2	9.2	9.2	9.2	9.3	9.3	9.3	9.3	9.4	9.4	9.4	9.5	9.5	9.5	9.5	9.6	9.6	9.6	9.7	9.7	9.7
Sunrise (AM)	8:08	8:08	8:08	8:08	8:08	8:08	8:08	8:08	8:08	8:08	8:07	8:07	8:07	8:07	8:06	8:06	8:06	8:05	8:05	8:04	8:04	8:03	8:02	8:02	8:01	8:00	8:00	7:59	7:58	7:57	7:56
Sunset (PM)	5:09	5:10	5:11	5:12	5:12	5:13	5:14	5:15	5:16	5:17	5:18	5:19	5:20	5:21	5:22	5:23	5:24	5:26	5:27	5:28	5:29	5:30	5:31	5:32	5:34	5:35	5:36	5:37	5:38	5:40	5:41

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.0	8:08	5:09
2	9.0	8:08	5:10
3	9.0	8:08	5:11
4	9.1	8:08	5:12
5	9.1	8:08	5:12
6	9.1	8:08	5:13
7	9.1	8:08	5:14
8	9.1	8:08	5:15
9	9.1	8:08	5:16
10	9.2	8:08	5:17
11	9.2	8:07	5:18
12	9.2	8:07	5:19
13	9.2	8:07	5:20
14	9.2	8:07	5:21
15	9.3	8:06	5:22
16	9.3	8:06	5:23
17	9.3	8:06	5:24
18	9.3	8:05	5:26
19	9.4	8:05	5:27
20	9.4	8:04	5:28
21	9.4	8:04	5:29
22	9.5	8:03	5:30
23	9.5	8:02	5:31
24	9.5	8:02	5:32
25	9.5	8:01	5:34
26	9.6	8:00	5:35
27	9.6	8:00	5:36
28	9.6	7:59	5:37
29	9.7	7:58	5:38
30	9.7	7:57	5:40
31	9.7	7:56	5:41

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.85 kWh/m².

For context, solar energy here swings from a low near 1.59 kWh/m² to a high of 7.29 kWh/m² in July across the year — January's 1.85 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)	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.7	1.7	1.7	1.7	1.7	1.8	1.8	1.8	1.8	1.9	1.9	1.9	1.9	2.0	2.0	2.0	2.1	2.1	2.1	2.2	2.2	2.2	2.3	2.3
Level	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	1.6	Dim
2	1.6	Dim
3	1.6	Dim
4	1.6	Dim
5	1.6	Dim
6	1.6	Dim
7	1.6	Dim
8	1.7	Dim
9	1.7	Dim
10	1.7	Dim
11	1.7	Dim
12	1.7	Dim
13	1.8	Dim
14	1.8	Dim
15	1.8	Dim
16	1.8	Dim
17	1.9	Dim
18	1.9	Dim
19	1.9	Dim
20	1.9	Dim
21	2.0	Dim
22	2.0	Moderate
23	2.0	Moderate
24	2.1	Moderate
25	2.1	Moderate
26	2.1	Moderate
27	2.2	Moderate
28	2.2	Moderate
29	2.2	Moderate
30	2.3	Moderate
31	2.3	Moderate

Planning a trip in January

Hazard calendar for Viana do Castelo

In seasonPeak

In January, Viana do Castelo sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Viana do Castelo's rainy season runs October–May, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is January a good time to visit Viana do Castelo?

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

3.3

Sightseeing

12th-best month of the year

0.0

Beach & pool

12th-best month of the year

January is a weaker month for outdoor sightseeing in Viana do Castelo.

What to pack for Viana do Castelo in January

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

In January, Viana do Castelo sees daytime highs around 13°C and nights near 7°C. Worth packing: a warm layer and rain gear. About 14 days see rain.

a warm layerrain gear

Sea temperature near Viana do Castelo in January

The nearest coast averages about 14°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 17°C and coldest in February near 13°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)	14	13	14	14	15	17	17	17	17	17	16	15
Comfort	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Bracing

	Sea temperature (°C)	Comfort
Jan	14	Bracing
Feb	13	Bracing
Mar	14	Bracing
Apr	14	Bracing
May	15	Cool
Jun	17	Cool
Jul	17	Cool
Aug	17	Cool
Sep	17	Cool
Oct	17	Cool
Nov	16	Cool
Dec	15	Bracing

UV index in Viana do Castelo in January

LowModerateHighVery highExtreme

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

Under clear skies, the midday UV index in Viana do Castelo peaks around June 23 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	5	6	7	9	9	8	6	4	2	2
Level	Low	Moderate	Moderate	High	High	Very high	Very high	Very high	High	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	5	Moderate
Apr	6	High
May	7	High
Jun	9	Very high
Jul	9	Very high
Aug	8	Very high
Sep	6	High
Oct	4	Moderate
Nov	2	Moderate
Dec	2	Low

Location & terrain

Where is Viana do Castelo?

Viana do Castelo sits at 41.7°N, 8.8°W, 12 m above sea level, in Portugal. The nearest listed city is Esposende, 18 km away.

Topography around Viana do Castelo

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

Within 3 km, the terrain around Viana do Castelo has significant variations in elevation — a maximum elevation change of 300 m around an average of 29 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 793 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,517 m.

The land around Viana do Castelo is covered by water (37%), trees (23%) and artificial surfaces (22%) within 3 km, water (47%) and trees (29%) within 16 km, and trees (38%), water (32%) and grassland (22%) within 80 km.

3 km

300 m

water 37%

16 km

793 m

water 47%

80 km

1,517 m

trees 38%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland

← December Viana do Castelo year-round climate February →Best places to visit in January

January weather nearby: Esposende 18 km · Ponte de Lima 22 km · Barcelos 25 km · Pedroso 32 km · Póvoa de Varzim 35 km · Braga 38 km · Arcos de Valdevez 38 km · Vila do Conde 38 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 Viana do Castelo (41.6932°, -8.8329°, elevation 12 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	13	7
2	13	7
3	13	7
4	13	7
5	13	7
6	13	7
7	13	7
8	13	7
9	13	7
10	13	7
11	13	7
12	13	7
13	13	7
14	13	7
15	13	7
16	13	7
17	13	7
18	13	7
19	13	7
20	13	7
21	13	7
22	13	7
23	13	7
24	13	7
25	13	7
26	13	7
27	13	7
28	13	7
29	13	7
30	13	7
31	13	7

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	40	60
5	40	60
6	40	60
7	41	59
8	41	59
9	41	59
10	42	58
11	41	59
12	42	58
13	42	58
14	43	57
15	43	57
16	43	57
17	43	57
18	43	57
19	44	56
20	45	55
21	45	55
22	45	55
23	47	53
24	47	53
25	47	53
26	47	53
27	48	52
28	48	52
29	48	52
30	48	52
31	48	52

	Rain chance (%)
1	50
2	50
3	51
4	50
5	50
6	50
7	50
8	49
9	49
10	49
11	48
12	48
13	47
14	47
15	46
16	45
17	44
18	43
19	43
20	42
21	41
22	40
23	39
24	38
25	38
26	37
27	37
28	36
29	36
30	37
31	37

	Dry (%)	Comfortable (%)
1	95	5
2	95	5
3	95	5
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	97	3
10	97	3
11	97	3
12	97	3
13	97	3
14	98	2
15	98	2
16	98	2
17	98	2
18	98	2
19	98	2
20	98	2
21	98	2
22	98	2
23	98	2
24	98	2
25	98	2
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

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

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	40	60
5	40	60
6	40	60
7	41	59
8	41	59
9	41	59
10	42	58
11	41	59
12	42	58
13	42	58
14	43	57
15	43	57
16	43	57
17	43	57
18	43	57
19	44	56
20	45	55
21	45	55
22	45	55
23	47	53
24	47	53
25	47	53
26	47	53
27	48	52
28	48	52
29	48	52
30	48	52
31	48	52

	Rain chance (%)
1	50
2	50
3	51
4	50
5	50
6	50
7	50
8	49
9	49
10	49
11	48
12	48
13	47
14	47
15	46
16	45
17	44
18	43
19	43
20	42
21	41
22	40
23	39
24	38
25	38
26	37
27	37
28	36
29	36
30	37
31	37

	Dry (%)	Comfortable (%)
1	95	5
2	95	5
3	95	5
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	97	3
10	97	3
11	97	3
12	97	3
13	97	3
14	98	2
15	98	2
16	98	2
17	98	2
18	98	2
19	98	2
20	98	2
21	98	2
22	98	2
23	98	2
24	98	2
25	98	2
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

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

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	40	60
5	40	60
6	40	60
7	41	59
8	41	59
9	41	59
10	42	58
11	41	59
12	42	58
13	42	58
14	43	57
15	43	57
16	43	57
17	43	57
18	43	57
19	44	56
20	45	55
21	45	55
22	45	55
23	47	53
24	47	53
25	47	53
26	47	53
27	48	52
28	48	52
29	48	52
30	48	52
31	48	52

	Rain chance (%)
1	50
2	50
3	51
4	50
5	50
6	50
7	50
8	49
9	49
10	49
11	48
12	48
13	47
14	47
15	46
16	45
17	44
18	43
19	43
20	42
21	41
22	40
23	39
24	38
25	38
26	37
27	37
28	36
29	36
30	37
31	37

	Dry (%)	Comfortable (%)
1	95	5
2	95	5
3	95	5
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	97	3
10	97	3
11	97	3
12	97	3
13	97	3
14	98	2
15	98	2
16	98	2
17	98	2
18	98	2
19	98	2
20	98	2
21	98	2
22	98	2
23	98	2
24	98	2
25	98	2
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1