General José de San Martín weather in January

In January, General José de San Martín sees average daytime highs of 33°C and overnight lows near 22°C, with 119 mm of rain across 11.3 wet days and about 13.5 hours of daylight. It is the 1st-warmest and 7th-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 45% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 13 h 36 min at the start of January to 13 h 18 min by month's end. Set against the rest of the year, January is General José de San Martín's 6th-clearest and 10th-windiest month. For the whole year in context, see General José de San Martín's year-round climate.

Daytime high
33°
1st warmest
Overnight low
22°
12th coldest
Rainfall
119 mm
11.3 wet days
Daylight
13 h 30 min
6:22 AM – 7:52 PM
Cloud cover
50%
6th clearest
Wind
11 km/h
10th windiest
Solar energy
6.79 kWh/m²
Travel score
3.7
out of 10

General José de San Martín is city in Chaco, Argentina.

Density
398/km²
people per km²

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 General José de San Martín reaches about 33°C in the afternoon and slips back to 22°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 36°C. Set against its neighbours, January runs about 1°C warmer than December and about 1°C warmer than February.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13322
23322
33322
43322
53322
63322
73322
83322
93322
103322
113322
123322
133322
143322
153322
163322
173322
183322
193322
203322
213222
223222
233222
243222
253222
263222
273222
283222
293222
303222
313222

How January really feels in General José de 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.

General José de San Martín weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 22°11911.313.53.7
Feb32° / 22°12610.712.94.1
Mar30° / 20°1241112.25.0
Apr27° / 18°1511011.46.5
May23° / 14°948.910.77.1
Jun22° / 13°707.810.46.9
Jul21° / 11°536.510.57.3
Aug24° / 13°586.411.17.8
Sep26° / 15°87811.87.2
Oct28° / 18°15411.312.65.9
Nov30° / 19°16210.713.35.2
Dec32° / 21°15010.813.64.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35842
45842
55941
65941
76040
86040
96139
106139
116139
126139
136139
146139
156139
166139
176040
186040
196040
206040
216040
226040
236040
245941
255941
265941
275941
285842
295842
305842
315842

Chance of precipitation in January

Any precipitation

General José de San Martín gets around 119 mm of rain over 11.3 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 37% and peaks near 41% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
234
334
434
533
633
733
833
933
1033
1134
1234
1335
1435
1536
1637
1738
1838
1939
2039
2140
2240
2340
2440
2541
2641
2741
2841
2940
3040
3140

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the oppressive band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 82% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11613244115
21613244115
31613244115
41613254015
51613254015
61613254015
71613263915
81613263915
91614263914
101514264014
111514264013
121514264113
131514264212
141414264312
151414254411
161414254511
171413254611
181413244710
191413244810
201413234910
21141323509
22141323509
23141322528
24141222538
25141222538
26141222538
27131123557
28131123557
29131123548
30131123548
31131124538

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 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
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 13 h 36 min at the start of January to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over January. Sunrise moves from 6:11 AM to 6:33 AM, and sunset from 7:50 PM to 7:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.66:117:50
213.66:127:50
313.66:137:50
413.66:137:50
513.66:147:51
613.66:157:51
713.66:157:51
813.66:167:51
913.66:177:51
1013.66:177:51
1113.66:187:52
1213.56:197:52
1313.56:207:52
1413.56:207:52
1513.56:217:52
1613.56:227:52
1713.56:227:52
1813.56:237:51
1913.56:247:51
2013.46:257:51
2113.46:267:51
2213.46:267:51
2313.46:277:51
2413.46:287:50
2513.46:297:50
2613.36:297:50
2713.36:307:50
2813.36:317:49
2913.36:327:49
3013.36:327:49
3113.36:337:48

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 6.79 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.65 kWh/m² to a high of 6.79 kWh/m² in January across the year — January's 6.79 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
46.9Intense
56.9Intense
66.9Intense
76.9Intense
86.9Intense
96.9Intense
106.9Intense
116.9Intense
126.9Intense
136.8Intense
146.8Intense
156.8Intense
166.8Intense
176.8Intense
186.7Intense
196.7Intense
206.7Intense
216.7Intense
226.6Intense
236.6Intense
246.6Intense
256.6Intense
266.6Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
316.5Intense
Planning a trip in January

Is January a good time to visit General José de San Martín?

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

3.7
Sightseeing
12th-best month of the year
6.2
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in General José de San Martín. The water and warmth also suit a beach or pool day.

What to pack for General José de San Martín in January

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

In January, General José de San Martín sees daytime highs around 33°C and nights near 22°C. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

UV index in General José de San Martín in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in General José de San Martín peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateVery highExtremeJan 18UV 14Jul 17UV 4
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr8Very high
May6High
Jun5Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct7Very high
Nov12Extreme
Dec13Extreme

Air quality in General José de San Martín 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 General José de San Martín is worst in September — around 22 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (May, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1321 µg/m³May 137 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb10Good
Mar10Good
Apr7Good
May7Good
Jun7Good
Jul10Good
Aug19Moderate
Sep22Moderate
Oct14Moderate
Nov10Good
Dec8Good
Location & terrain

Where is General José de San Martín?

General José de San Martín sits at 26.5°S, 59.3°W, 62 m above sea level, in Argentina. The nearest listed city is Machagai, 83 km away.

Topography around General José de San Martín

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

Within 3 km, the terrain around General José de San Martín has only modest variations in elevation — a maximum elevation change of 13 m around an average of 75 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 27 m; within 80 km, only modest variations in elevation — a maximum elevation change of 54 m.

The land around General José de San Martín is covered by grassland (49%) and trees (28%) within 3 km, grassland (50%) and trees (47%) within 16 km, and trees (53%) and grassland (44%) within 80 km.

3 km
13 m
16 km
27 m
80 km
54 m
treesgrasslandcroplandartificial surfaceswetland
January weather nearby: Machagai 83 km · Pirané 92 km · Quitilipi 94 km · Fontana 103 km · Pilar 109 km · Resistencia 109 km · Tres Isletas 111 km · Barranqueras 112 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 General José de San Martín (-26.5364°, -59.3414°, elevation 62 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).