San Martín weather in January

In January, San Martín sees average daytime highs of 33°C and overnight lows near 21°C, with 48 mm of rain across 7.8 wet days and about 13.9 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 64% of the time in January, and the air most often feels dry.

Daylight stretches from about 14 h 12 min at the start of January to 13 h 36 min by month's end. Set against the rest of the year, January is San Martín's 8th-clearest and 5th-windiest month. For the whole year in context, see San Martín's year-round climate.

Daytime high
33°
1st warmest
Overnight low
21°
12th coldest
Rainfall
48 mm
7.8 wet days
Daylight
14 hours
6:44 AM – 8:42 PM
Cloud cover
36%
8th clearest
Wind
11 km/h
5th windiest
Solar energy
7.46 kWh/m²
Travel score
4.0
out of 10

San Martín is city in the Mendoza Province, Argentina.

Density
55/km²
people per km²
Founded
1816

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical January day in San Martín reaches about 33°C in the afternoon and slips back to 21°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 37°C. Set against its neighbours, January runs on par with December and about 2°C warmer than February.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13321
23321
33321
43321
53321
63321
73321
83321
93321
103321
113321
123321
133321
143321
153321
163321
173321
183321
193321
203321
213321
223321
233321
243320
253320
263320
273320
283220
293220
303220
313220

How January really feels in San Martín

Once humidity and wind are folded in, January averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

San Martín weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 21°487.813.94.0
Feb31° / 19°376.313.25.0
Mar28° / 17°436.212.36.9
Apr23° / 12°204.311.28.2
May19° / 132.610.37.2
Jun15° / 61.39.95.9
Jul15° / 61.6105.9
Aug18° / 101.910.87.6
Sep22° / 10°122.311.88.4
Oct26° / 14°203.912.88.1
Nov30° / 17°275.113.76.1
Dec32° / 19°386.714.14.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 64% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 20% of January, with mostly cloudy or overcast conditions the remaining 16%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18416
28317
38218
48218
58218
68218
78218
88218
98218
108218
118218
128218
138218
148218
158317
168317
178317
188416
198416
208416
218416
228515
238515
248614
258614
268614
278614
288614
298614
308614
318614

Chance of precipitation in January

Any precipitation

San Martín gets around 48 mm of rain over 7.8 wet days in January, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
126
226
327
427
527
627
727
827
926
1026
1126
1225
1325
1425
1525
1625
1724
1824
1924
2024
2124
2224
2324
2424
2524
2624
2724
2824
2924
3024
3125

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 46% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
150301740
249301740
348311840
447311840
546311850
646311850
745311850
846311850
946311860
1046301860
1146301860
1247301860
1347291860
1447291860
1546291860
1646291960
1746291960
1846292051
1946282051
2046282051
2146282051
2246282141
2346282141
2446282141
2546282141
2646282131
2746292131
2846292131
2946292141
3046292041
3147292040

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 14 h 12 min at the start of January to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over January. Sunrise moves from 6:33 AM to 6:58 AM, and sunset from 8:42 PM to 8:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.26:338:42
214.16:338:42
314.16:348:42
414.16:358:42
514.16:358:42
614.16:368:42
714.16:378:42
814.16:388:43
914.16:388:43
1014.16:398:43
1114.06:408:43
1214.06:418:43
1314.06:428:42
1414.06:438:42
1514.06:438:42
1614.06:448:42
1713.96:458:42
1813.96:468:42
1913.96:478:41
2013.96:488:41
2113.96:498:41
2213.86:508:41
2313.86:518:40
2413.86:528:40
2513.86:528:39
2613.86:538:39
2713.76:548:38
2813.76:558:38
2913.76:568:38
3013.76:578:37
3113.66:588:36

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 7.46 kWh/m².

For context, solar energy here swings from a low near 2.86 kWh/m² to a high of 7.86 kWh/m² in December across the year — January's 7.46 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.7Intense
27.7Intense
37.7Intense
47.7Intense
57.6Intense
67.6Intense
77.6Intense
87.6Intense
97.6Intense
107.6Intense
117.5Intense
127.5Intense
137.5Intense
147.5Intense
157.5Intense
167.5Intense
177.5Intense
187.4Intense
197.4Intense
207.4Intense
217.4Intense
227.4Intense
237.4Intense
247.3Intense
257.3Intense
267.3Intense
277.3Intense
287.2Intense
297.2Intense
307.2Intense
317.1Intense
Planning a trip in January

Is January a good time to visit San Martín?

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

4.0
Sightseeing
12th-best month of the year
7.0
Beach & pool
6th-best month of the year

January is a reasonable time to visit San Martín for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for San Martín in January

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

In January, San Martín sees daytime highs around 33°C and nights near 21°C. Pack light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in San Martín in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Martín peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateHighVery highExtremeJan 18UV 14Jun 19UV 3
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar10Extreme
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct10Very high
Nov12Extreme
Dec13Extreme
Location & terrain

Where is San Martín?

San Martín sits at 33.1°S, 68.5°W, 656 m above sea level, in Argentina. The nearest listed city is Rivadavia, 12 km away.

Topography around San Martín

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

Within 3 km, the terrain around San Martín has only modest variations in elevation — a maximum elevation change of 18 m around an average of 658 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 67 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,924 m.

The land around San Martín is covered by artificial surfaces (44%) within 3 km, cropland (38%), shrubs (25%) and grassland (25%) within 16 km, and shrubs (69%) within 80 km.

3 km
18 m
16 km
67 m
80 km
2,924 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
January weather nearby: Rivadavia 12 km · Rodeo del Medio 22 km · Perdriel 39 km · Mendoza 41 km · Tupungato 70 km · Tunuyán 75 km · Pocito 156 km · Caucete 160 km

Argentina travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / I
220 V · 50 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$14,898
2025
Happiness
6.4 / 10
World Happiness, 2025
Homicide rate
4.5
per 100k, 2023
Road deaths
14.1
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 575
Religion
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus Christ 1%

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 San Martín (-33.0834°, -68.4731°, elevation 656 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).