São Martinho weather in January

In January, São Martinho sees average daytime highs of 16°C and overnight lows near 13°C, with 51 mm of rain across 8.4 wet days and about 10.1 hours of daylight. It is the 11th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 16°C through the month. The sky is clear or mostly clear about 14% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of January to 10 h 24 min by month's end. Set against the rest of the year, January is São Martinho's 11th-clearest and 7th-windiest month. For the whole year in context, see São Martinho's year-round climate.

Daytime high
16°
11th warmest
Overnight low
13°
3rd coldest
Rainfall
51 mm
8.4 wet days
Daylight
10 h 06 min
8:15 AM – 6:19 PM
Cloud cover
68%
11th clearest
Wind
11 km/h
7th windiest
Solar energy
2.84 kWh/m²
Travel score
4.9
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 16°C through the month.

A typical January day in São Martinho reaches about 16°C in the afternoon and slips back to 13°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 17°C. Set against its neighbours, January runs about 1°C cooler than December and on par with February.

10°13°15°18°20°151015202531
Avg high (°C)Avg low (°C)
11613
21613
31613
41613
51613
61613
71613
81613
91613
101613
111613
121613
131613
141613
151613
161613
171613
181513
191513
201513
211513
221513
231513
241513
251513
261513
271513
281512
291512
301512
311512

São Martinho weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan16° / 13°518.410.14.9
Feb15° / 12°537.910.84.8
Mar16° / 13°5610.311.85.0
Apr17° / 13°478.612.85.4
May19° / 14°287.413.76.4
Jun21° / 16°133.514.17.5
Jul23° / 18°41.413.98.6
Aug24° / 19°72.513.28.6
Sep23° / 19°257.712.27.2
Oct21° / 18°6911.711.26.1
Nov18° / 15°641110.35.6
Dec17° / 14°8310.49.95.1

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 19% of January, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23763
33664
43664
53565
63466
73466
83466
93466
103367
113466
123367
133367
143367
153268
163367
173367
183268
193367
203268
213268
223268
233367
243367
253367
263367
273367
283466
293466
303565
313565

Chance of precipitation in January

Any precipitation

São Martinho gets around 51 mm of rain over 8.4 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 27% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
228
328
427
527
626
726
826
926
1026
1126
1226
1326
1426
1526
1626
1726
1826
1926
2027
2127
2228
2328
2428
2528
2629
2729
2829
2929
3029
3129

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 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
175241
275241
376231
477221
578211
678211
779201
879201
980191
1082180
1182180
1283170
1384160
1484160
1585150
1685150
1786140
1886140
1987130
2088120
2188120
2289110
2390100
2490100
259190
269190
279280
289280
299280
309280
319280

Wind in January

Winds average 11 km/h in January.

Across January, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 54 min at the start of January to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over January. Sunrise moves from 8:14 AM to 8:09 AM, and sunset from 6:07 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.98:146:07
29.98:156:08
39.98:156:09
49.98:156:10
59.98:156:10
69.98:156:11
79.98:156:12
810.08:156:13
910.08:156:13
1010.08:156:14
1110.08:156:15
1210.08:156:16
1310.08:156:17
1410.08:156:17
1510.18:156:18
1610.18:156:19
1710.18:156:20
1810.18:156:21
1910.18:146:22
2010.18:146:23
2110.28:146:24
2210.28:136:24
2310.28:136:25
2410.28:136:26
2510.28:126:27
2610.38:126:28
2710.38:116:29
2810.38:116:30
2910.38:116:31
3010.48:106:32
3110.48:096:33

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.84 kWh/m².

For context, solar energy here swings from a low near 2.58 kWh/m² to a high of 7.31 kWh/m² in July across the year — January's 2.84 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.6Moderate
22.6Moderate
32.7Moderate
42.7Moderate
52.7Moderate
62.7Moderate
72.7Moderate
82.7Moderate
92.7Moderate
102.7Moderate
112.8Moderate
122.8Moderate
132.8Moderate
142.8Moderate
152.8Moderate
162.8Moderate
172.9Moderate
182.9Moderate
192.9Moderate
202.9Moderate
212.9Moderate
223.0Moderate
233.0Moderate
243.0Moderate
253.0Moderate
263.1Moderate
273.1Moderate
283.1Moderate
293.1Moderate
303.2Moderate
313.2Moderate
Planning a trip in January

Hazard calendar for São Martinho

In seasonPeak

None of São Martinho's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

São Martinho sits in the Atlantic hurricane belt; the season peaks August–October.

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

Is January a good time to visit São Martinho?

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

4.9
Sightseeing
11th-best month of the year
0.4
Beach & pool
11th-best month of the year

January is a reasonable time to visit São Martinho for sightseeing.

What to pack for São Martinho in January

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

In January, São Martinho sees daytime highs around 16°C and nights near 13°C. Worth packing: a warm layer and rain gear. About 8 days see rain.

a warm layerrain gear

Sea temperature near São Martinho in January

The nearest coast averages about 19°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 September at about 24°C and coldest in March near 18°C.

It's comfortable for a long swim from May 30 to Dec 14 — about 6.5 months when the water holds above 20°C.

16°18°20°22°24°26°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar18Cool
Apr18Cool
May19Cool
Jun21Refreshing
Jul22Refreshing
Aug23Refreshing
Sep24Refreshing
Oct23Refreshing
Nov21Refreshing
Dec20Cool

UV index in São Martinho in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in São Martinho peaks around July 15 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highExtremeVery highHighModerateJul 15UV 11Dec 16UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar9Very high
Apr8Very high
May9Very high
Jun10Extreme
Jul11Extreme
Aug10Very high
Sep8Very high
Oct7High
Nov3Moderate
Dec3Moderate
Location & terrain

Where is São Martinho?

São Martinho sits at 32.6°N, 16.9°W, 198 m above sea level, in Portugal. The nearest listed city is Santo António, 2.0 km away.

Topography around São Martinho

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

Within 3 km, the terrain around São Martinho has significant variations in elevation — a maximum elevation change of 469 m around an average of 108 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,832 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,780 m.

The land around São Martinho is covered by water (40%), artificial surfaces (34%) and trees (21%) within 3 km, water (55%) and trees (32%) within 16 km, and water (93%) within 80 km.

3 km
469 m
16 km
1,832 m
80 km
1,780 m
treesshrubsgrasslandcroplandartificial surfaceswater
January weather nearby: Santo António 2.0 km · Funchal 3.0 km · Câmara de Lobos 4.0 km · Caniço 9.0 km · Santa Cruz de la Palma 447 km · Los Llanos de Aridane 453 km · Tacoronte 466 km · La Laguna 466 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 Martinho (32.6448°, -16.9384°, elevation 198 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).