Viseu weather in January

In January, Viseu sees average daytime highs of 11°C and overnight lows near 4°C, with 152 mm of precipitation across 11.6 wet days and about 9.4 hours of daylight. It is the 12th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 11°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 h 06 min at the start of January to 9 h 48 min by month's end. Set against the rest of the year, January is Viseu's 10th-clearest and 2nd-windiest month. For the whole year in context, see Viseu's year-round climate.

Daytime high: 11°; 12th warmest
Overnight low: 4°; 1st coldest
Precipitation: 152 mm; 11.6 wet days
Daylight: 9 h 24 min; 7:59 AM – 5:23 PM
Cloud cover: 60%; 10th clearest
Wind: 10 km/h; 2nd windiest
Solar energy: 1.92 kWh/m²
Travel score: 2.5; out of 10

Viseu is city seat of Viseu municipality.

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

← December Viseu 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 11°C through the month.

A typical January day in Viseu reaches about 11°C in the afternoon and slips back to 4°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 14°C. Set against its neighbours, January runs on par with December and about 2°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)	11	11	11	11	11	11	11	10	10	10	10	10	10	10	10	10	10	10	11	11	11	11	11	11	11	11	11	11	11	11	11
Avg low (°C)	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

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

Viseu weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	11° / 4°	152	11.6	0.5	9.4	2.5
Feb	12° / 4°	102	9.3	0.3	10.4	3.3
Mar	15° / 6°	115	10.6	0	11.7	4.5
Apr	17° / 7°	118	12.8	0	13.1	4.9
May	20° / 10°	98	11.6	0	14.2	6.1
Jun	23° / 13°	40	6.2	0	14.9	7.7
Jul	27° / 15°	19	3.7	0	14.6	8.2
Aug	27° / 15°	26	4.6	0	13.6	8.0
Sep	24° / 13°	66	7.1	0	12.3	7.6
Oct	19° / 10°	168	12.2	0	10.9	5.7
Nov	14° / 7°	150	12.7	0.1	9.7	3.7
Dec	11° / 5°	160	11.6	0.1	9.1	2.7

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%.

	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 (%)	39	39	38	39	39	39	39	40	40	40	40	41	42	43	43	43	44	45	45	46	46	47	48	48	48	48	48	48	48	47	47
Cloudier (%)	61	61	62	61	61	61	61	60	60	60	60	59	58	57	57	57	56	55	55	54	54	53	52	52	52	52	52	52	52	53	53

	Clearer (%)	Cloudier (%)
1	39	61
2	39	61
3	38	62
4	39	61
5	39	61
6	39	61
7	39	61
8	40	60
9	40	60
10	40	60
11	40	60
12	41	59
13	42	58
14	43	57
15	43	57
16	43	57
17	44	56
18	45	55
19	45	55
20	46	54
21	46	54
22	47	53
23	48	52
24	48	52
25	48	52
26	48	52
27	48	52
28	48	52
29	48	52
30	47	53
31	47	53

Chance of precipitation in January

Any precipitationSnow

Viseu gets around 152 mm of rain and snow over 11.6 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 38% and peaks near 42% on the wettest days, and about 1 day brings snow. 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 (%)	42	42	42	42	42	41	41	41	40	40	40	39	39	39	38	38	37	37	36	36	36	35	35	35	34	34	34	34	34	34	34
Snow chance (%)	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1

	Rain chance (%)	Snow chance (%)
1	42	2
2	42	2
3	42	2
4	42	2
5	42	2
6	41	2
7	41	2
8	41	2
9	40	2
10	40	2
11	40	2
12	39	2
13	39	2
14	39	2
15	38	2
16	38	2
17	37	2
18	37	1
19	36	1
20	36	1
21	36	1
22	35	1
23	35	1
24	35	1
25	34	1
26	34	1
27	34	1
28	34	1
29	34	1
30	34	1
31	34	1

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 100% 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 (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

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

Wind in January

Winds average 10 km/h in January.

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

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 06 min at the start of January to 9 h 48 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 8:01 AM to 7:50 AM, and sunset from 5:09 PM to 5:40 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)	9.1	9.1	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.3	9.3	9.3	9.3	9.3	9.4	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	9.8	9.8	9.8
Sunrise (AM)	8:01	8:01	8:01	8:01	8:01	8:01	8:01	8:01	8:01	8:01	8:01	8:00	8:00	8:00	8:00	7:59	7:59	7:58	7:58	7:58	7:57	7:56	7:56	7:55	7:55	7:54	7:53	7:53	7:52	7:51	7:50
Sunset (PM)	5:09	5:10	5:10	5:11	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	5:25	5:26	5:27	5:28	5:29	5:30	5:32	5:33	5:34	5:35	5:36	5:37	5:39	5:40

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.1	8:01	5:09
2	9.1	8:01	5:10
3	9.2	8:01	5:10
4	9.2	8:01	5:11
5	9.2	8:01	5:12
6	9.2	8:01	5:13
7	9.2	8:01	5:14
8	9.2	8:01	5:15
9	9.2	8:01	5:16
10	9.3	8:01	5:17
11	9.3	8:01	5:18
12	9.3	8:00	5:19
13	9.3	8:00	5:20
14	9.3	8:00	5:21
15	9.4	8:00	5:22
16	9.4	7:59	5:23
17	9.4	7:59	5:24
18	9.4	7:58	5:25
19	9.5	7:58	5:26
20	9.5	7:58	5:27
21	9.5	7:57	5:28
22	9.5	7:56	5:29
23	9.6	7:56	5:30
24	9.6	7:55	5:32
25	9.6	7:55	5:33
26	9.7	7:54	5:34
27	9.7	7:53	5:35
28	9.7	7:53	5:36
29	9.8	7:52	5:37
30	9.8	7:51	5:39
31	9.8	7:50	5:40

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.92 kWh/m².

For context, solar energy here swings from a low near 1.66 kWh/m² to a high of 7.25 kWh/m² in July across the year — January's 1.92 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	1.7	1.7	1.7	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	2.0	2.1	2.1	2.1	2.2	2.2	2.2	2.3	2.3	2.3	2.4
Level	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	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	1.6	Dim
2	1.7	Dim
3	1.7	Dim
4	1.7	Dim
5	1.7	Dim
6	1.7	Dim
7	1.7	Dim
8	1.7	Dim
9	1.7	Dim
10	1.8	Dim
11	1.8	Dim
12	1.8	Dim
13	1.8	Dim
14	1.9	Dim
15	1.9	Dim
16	1.9	Dim
17	1.9	Dim
18	2.0	Dim
19	2.0	Dim
20	2.0	Moderate
21	2.0	Moderate
22	2.1	Moderate
23	2.1	Moderate
24	2.1	Moderate
25	2.2	Moderate
26	2.2	Moderate
27	2.2	Moderate
28	2.3	Moderate
29	2.3	Moderate
30	2.3	Moderate
31	2.4	Moderate

Planning a trip in January

Hazard calendar for Viseu

In seasonPeak

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

Viseu'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 Viseu?

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

2.5

Sightseeing

12th-best month of the year

0.0

Beach & pool

11th-best month of the year

January is a weaker month for outdoor sightseeing in Viseu.

What to pack for Viseu in January

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

In January, Viseu sees daytime highs around 11°C and nights near 4°C. Pack a warm layer. Worth having: rain gear. About 12 days see rain.

a warm layerrain gear

UV index in Viseu 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 Viseu peaks around July 13 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	7	7	9	9	9	6	5	2	2
Level	Low	Moderate	High	High	High	Very high	Very high	Very high	High	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	5	High
Apr	7	High
May	7	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

Air quality in Viseu in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Viseu is worst in October — around 29 µg/m³ PM2.5 (moderate), about 3.9× the cleanest month (November, 7 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)	9	10	13	11	8	21	9	24	23	29	7	7
Level	Good	Good	Moderate	Good	Good	Moderate	Good	Moderate	Moderate	Moderate	Good	Good

	PM2.5 (µg/m³)	Level
Jan	9	Good
Feb	10	Good
Mar	13	Moderate
Apr	11	Good
May	8	Good
Jun	21	Moderate
Jul	9	Good
Aug	24	Moderate
Sep	23	Moderate
Oct	29	Moderate
Nov	7	Good
Dec	7	Good

Location & terrain

Where is Viseu?

Viseu sits at 40.7°N, 7.9°W, 469 m above sea level, in Portugal. The nearest listed city is Arouca, 41 km away.

Topography around Viseu

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

Within 3 km, the terrain around Viseu has only modest variations in elevation — a maximum elevation change of 165 m around an average of 466 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 814 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,993 m.

The land around Viseu is covered by trees (45%) and artificial surfaces (35%) within 3 km, trees (56%) and grassland (36%) within 16 km, and trees (48%) and grassland (41%) within 80 km.

3 km

165 m

trees 45%

16 km

814 m

trees 56%

80 km

1,993 m

trees 48%

treesshrubsgrasslandcroplandartificial surfaceswater

← December Viseu year-round climate February →Best places to visit in January

January weather nearby: Arouca 41 km · Covilhã 54 km · São João da Madeira 56 km · Guarda 56 km · Baião 57 km · Sequeira 59 km · Feira 61 km · Vilar 61 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 Viseu (40.6617°, -7.909°, elevation 469 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. 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	11	4
2	11	4
3	11	4
4	11	4
5	11	4
6	11	4
7	11	4
8	10	4
9	10	4
10	10	4
11	10	4
12	10	4
13	10	4
14	10	4
15	10	4
16	10	4
17	10	4
18	10	4
19	11	4
20	11	4
21	11	4
22	11	4
23	11	4
24	11	4
25	11	4
26	11	4
27	11	4
28	11	4
29	11	4
30	11	4
31	11	4

	Clearer (%)	Cloudier (%)
1	39	61
2	39	61
3	38	62
4	39	61
5	39	61
6	39	61
7	39	61
8	40	60
9	40	60
10	40	60
11	40	60
12	41	59
13	42	58
14	43	57
15	43	57
16	43	57
17	44	56
18	45	55
19	45	55
20	46	54
21	46	54
22	47	53
23	48	52
24	48	52
25	48	52
26	48	52
27	48	52
28	48	52
29	48	52
30	47	53
31	47	53

	Rain chance (%)	Snow chance (%)
1	42	2
2	42	2
3	42	2
4	42	2
5	42	2
6	41	2
7	41	2
8	41	2
9	40	2
10	40	2
11	40	2
12	39	2
13	39	2
14	39	2
15	38	2
16	38	2
17	37	2
18	37	1
19	36	1
20	36	1
21	36	1
22	35	1
23	35	1
24	35	1
25	34	1
26	34	1
27	34	1
28	34	1
29	34	1
30	34	1
31	34	1

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

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

	Clearer (%)	Cloudier (%)
1	39	61
2	39	61
3	38	62
4	39	61
5	39	61
6	39	61
7	39	61
8	40	60
9	40	60
10	40	60
11	40	60
12	41	59
13	42	58
14	43	57
15	43	57
16	43	57
17	44	56
18	45	55
19	45	55
20	46	54
21	46	54
22	47	53
23	48	52
24	48	52
25	48	52
26	48	52
27	48	52
28	48	52
29	48	52
30	47	53
31	47	53

	Rain chance (%)	Snow chance (%)
1	42	2
2	42	2
3	42	2
4	42	2
5	42	2
6	41	2
7	41	2
8	41	2
9	40	2
10	40	2
11	40	2
12	39	2
13	39	2
14	39	2
15	38	2
16	38	2
17	37	2
18	37	1
19	36	1
20	36	1
21	36	1
22	35	1
23	35	1
24	35	1
25	34	1
26	34	1
27	34	1
28	34	1
29	34	1
30	34	1
31	34	1

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

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

	Clearer (%)	Cloudier (%)
1	39	61
2	39	61
3	38	62
4	39	61
5	39	61
6	39	61
7	39	61
8	40	60
9	40	60
10	40	60
11	40	60
12	41	59
13	42	58
14	43	57
15	43	57
16	43	57
17	44	56
18	45	55
19	45	55
20	46	54
21	46	54
22	47	53
23	48	52
24	48	52
25	48	52
26	48	52
27	48	52
28	48	52
29	48	52
30	47	53
31	47	53

	Rain chance (%)	Snow chance (%)
1	42	2
2	42	2
3	42	2
4	42	2
5	42	2
6	41	2
7	41	2
8	41	2
9	40	2
10	40	2
11	40	2
12	39	2
13	39	2
14	39	2
15	38	2
16	38	2
17	37	2
18	37	1
19	36	1
20	36	1
21	36	1
22	35	1
23	35	1
24	35	1
25	34	1
26	34	1
27	34	1
28	34	1
29	34	1
30	34	1
31	34	1

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