Chascomús weather in January

In January, Chascomús sees average daytime highs of 28°C and overnight lows near 18°C, with 88 mm of rain across 8.1 wet days and about 14.1 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 49% of the time in January, and the air most often feels muggy.

Daylight stretches from about 14 h 24 min at the start of January to 13 h 48 min by month's end. Set against the rest of the year, January is Chascomús's 1st-clearest and 6th-windiest month. For the whole year in context, see Chascomús's year-round climate.

Daytime high
28°
1st warmest
Overnight low
18°
12th coldest
Rainfall
88 mm
8.1 wet days
Daylight
14 h 12 min
5:57 AM – 8:06 PM
Cloud cover
44%
1st clearest
Wind
13 km/h
6th windiest
Solar energy
7.15 kWh/m²
Travel score
6.3
out of 10

Chascomús is city in Argentina.

Founded
1779

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 28°C through the month.

A typical January day in Chascomús reaches about 28°C in the afternoon and slips back to 18°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 33°C. Set against its neighbours, January runs about 1°C warmer than December and about 1°C warmer than February.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12818
22818
32818
42818
52818
62818
72818
82818
92817
102817
112817
122817
132817
142817
152817
162817
172817
182817
192818
202818
212818
222818
232818
242818
252818
262818
272818
282818
292818
302818
312818

Chascomús weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 18°888.114.16.3
Feb27° / 17°918.213.36.8
Mar25° / 16°857.712.37.4
Apr22° / 12°877.311.17.2
May18° / 57610.16.3
Jun15° / 655.79.64.9
Jul14° / 616.39.84.4
Aug16° / 656.410.75.5
Sep18° / 72711.86.2
Oct21° / 11°1019.112.96.6
Nov24° / 14°888.313.97.2
Dec27° / 16°818.714.46.9

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of January, with mostly cloudy or overcast conditions the remaining 34%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16436
26436
36436
46436
56535
66535
76535
86634
96634
106535
116634
126634
136634
146634
156733
166733
176733
186634
196733
206733
216733
226634
236733
246733
256634
266733
276634
286733
296634
306535
316634

Chance of precipitation in January

Any precipitation

Chascomús gets around 88 mm of rain over 8.1 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 26% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
228
328
428
528
627
727
827
927
1026
1126
1226
1325
1425
1524
1624
1724
1824
1924
2024
2124
2225
2325
2426
2526
2627
2728
2828
2929
3030
3131

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the muggy band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 34% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1171932285
2172031285
3172031285
4172030285
5172130285
6172129284
7172229284
8172229284
9172328284
10172328284
11182428283
12182428283
13182427283
14182427283
15182427283
16182428283
17182328283
18182328293
19182327293
20182227293
21182227304
22172127304
23172027314
24172027315
25171927325
26171827325
27171827336
28171727336
29171726336
30171726337
31171726337

Wind in January

Winds average 13 km/h in January.

Across January, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 14 h 24 min at the start of January to 13 h 48 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 5:44 AM to 6:11 AM, and sunset from 8:06 PM to 7:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.45:448:06
214.45:458:06
314.35:468:07
414.35:468:07
514.35:478:07
614.35:488:07
714.35:498:07
814.35:508:07
914.35:508:07
1014.35:518:07
1114.25:528:07
1214.25:538:07
1314.25:548:07
1414.25:558:07
1514.25:568:06
1614.25:578:06
1714.15:578:06
1814.15:588:06
1914.15:598:05
2014.16:008:05
2114.16:018:05
2214.06:028:04
2314.06:038:04
2414.06:048:03
2514.06:058:03
2613.96:068:02
2713.96:078:02
2813.96:088:01
2913.96:098:01
3013.86:108:00
3113.86:117:59

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 7.15 kWh/m².

For context, solar energy here swings from a low near 2.16 kWh/m² to a high of 7.37 kWh/m² in December across the year — January's 7.15 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.3Intense
37.3Intense
47.3Intense
57.3Intense
67.3Intense
77.3Intense
87.3Intense
97.3Intense
107.3Intense
117.3Intense
127.3Intense
137.3Intense
147.3Intense
157.2Intense
167.2Intense
177.2Intense
187.2Intense
197.2Intense
207.1Intense
217.1Intense
227.0Intense
237.0Intense
247.0Intense
256.9Intense
266.9Intense
276.8Intense
286.8Intense
296.7Intense
306.7Intense
316.6Intense
Planning a trip in January

Is January a good time to visit Chascomús?

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

6.3
Sightseeing
7th-best month of the year
7.4
Beach & pool
1st-best month of the year

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

What to pack for Chascomús in January

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

In January, Chascomús sees daytime highs around 28°C and nights near 18°C. Pack light clothes and sun protection. Worth having: rain gear. About 8 days see rain.

light clothessun protectionrain gear

Sea temperature near Chascomús in January

The nearest coast averages about 23°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 66 km away) is warmest in January at about 23°C and coldest in July near 11°C.

It's comfortable for a long swim from Nov 28 to Apr 4 — about 4.2 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar22Refreshing
Apr19Cool
May16Cool
Jun13Bracing
Jul11Bracing
Aug11Bracing
Sep13Bracing
Oct16Cool
Nov19Cool
Dec22Refreshing

UV index in Chascomús in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chascomús peaks around January 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 14UV 12Jun 20UV 2
UV index (midday)Level
Jan12Extreme
Feb11Extreme
Mar10Very high
Apr6High
May3Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct7Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Chascomús?

Chascomús sits at 35.6°S, 58.0°W, 19 m above sea level, in Argentina. The nearest listed city is General Belgrano, 48 km away.

Topography around Chascomús

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

Within 3 km, the terrain around Chascomús has only modest variations in elevation — a maximum elevation change of 23 m around an average of 9 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 33 m; within 80 km, only modest variations in elevation — a maximum elevation change of 56 m.

The land around Chascomús is covered by water (46%) and artificial surfaces (23%) within 3 km, grassland (49%) and cropland (36%) within 16 km, and grassland (58%) and cropland (31%) within 80 km.

3 km
23 m
16 km
33 m
80 km
56 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: General Belgrano 48 km · Coronel Brandsen 50 km · Magdalena 71 km · San Vicente 72 km · La Plata 73 km · San Miguel del Monte 74 km · Berisso 79 km · Ensenada 80 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 Chascomús (-35.5768°, -58.0121°, elevation 19 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).