San Javier weather in January

In January, San Javier sees average daytime highs of 31°C and overnight lows near 21°C, with 127 mm of rain across 9.4 wet days and about 13.8 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 50% of the time in January, and the air most often feels muggy.

Daylight stretches from about 13 h 54 min at the start of January to 13 h 30 min by month's end. Set against the rest of the year, January is San Javier's 3rd-clearest and 11th-windiest month. For the whole year in context, see San Javier's year-round climate.

Daytime high
31°
1st warmest
Overnight low
21°
12th coldest
Rainfall
127 mm
9.4 wet days
Daylight
13 h 48 min
6:16 AM – 8:02 PM
Cloud cover
45%
3rd clearest
Wind
11 km/h
11th windiest
Solar energy
7 kWh/m²
Travel score
4.6
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical January day in San Javier reaches about 31°C in the afternoon and slips back to 21°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 27°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)
13121
23121
33121
43121
53121
63121
73121
83121
93121
103121
113121
123121
133121
143121
153121
163121
173121
183121
193121
203121
213121
223121
233121
243121
253121
263121
273121
283121
293121
303121
313121

How January really feels in San Javier

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 Javier weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 21°1279.413.84.6
Feb30° / 20°1188.813.15.1
Mar28° / 18°1179.112.26.2
Apr25° / 15°1388.911.37.2
May21° / 12°83610.57.1
Jun18° / 10°615.610.16.6
Jul18° / 435.210.26.8
Aug21° / 10°635.310.97.4
Sep23° / 12°766.711.87.6
Oct25° / 15°1379.512.87.1
Nov28° / 17°1197.613.56.6
Dec30° / 19°1378.713.95.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% 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 36%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26238
36238
46238
56337
66337
76337
86436
96337
106337
116436
126436
136436
146535
156535
166634
176634
186634
196634
206733
216733
226733
236634
246634
256634
266634
276535
286535
296535
306337
316337

Chance of precipitation in January

Any precipitation

San Javier gets around 127 mm of rain over 9.4 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 30% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
330
430
530
630
730
831
931
1031
1130
1230
1330
1430
1529
1629
1729
1829
1929
2029
2129
2229
2330
2430
2531
2631
2732
2832
2933
3033
3133

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
14122229285
24122229285
34122229295
44122229295
54132229294
64132229294
74132229294
84132229294
94132229293
104132229293
114132229283
124132330283
134122330282
144122331282
154112431272
164112432272
174112433272
184102433262
194102433262
204102533262
21492534262
22492534262
23392534263
24382534263
25382435263
26382435274
27382435274
28382335274
29382334275
30282334275
31292334275

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 13 h 54 min at the start of January to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over January. Sunrise moves from 6:04 AM to 6:29 AM, and sunset from 8:01 PM to 7:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.96:048:01
213.96:058:01
313.96:068:02
413.96:078:02
513.96:078:02
613.96:088:02
713.96:098:02
813.96:098:02
913.96:108:03
1013.96:118:03
1113.86:128:03
1213.86:128:03
1313.86:138:03
1413.86:148:02
1513.86:158:02
1613.86:168:02
1713.86:178:02
1813.76:178:02
1913.76:188:02
2013.76:198:02
2113.76:208:01
2213.76:218:01
2313.76:228:01
2413.66:228:01
2513.66:238:00
2613.66:248:00
2713.66:257:59
2813.66:267:59
2913.56:277:59
3013.56:287:58
3113.56:297:58

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 7 kWh/m².

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 7.1 kWh/m² in December across the year — January's 7 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.1Intense
27.1Intense
37.1Intense
47.1Intense
57.1Intense
67.1Intense
77.1Intense
87.1Intense
97.1Intense
107.1Intense
117.1Intense
127.1Intense
137.1Intense
147.1Intense
157.1Intense
167.0Intense
177.0Intense
187.0Intense
197.0Intense
207.0Intense
217.0Intense
226.9Intense
236.9Intense
246.9Intense
256.8Intense
266.8Intense
276.8Intense
286.7Intense
296.7Intense
306.7Intense
316.6Intense
Planning a trip in January

Is January a good time to visit San Javier?

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

4.6
Sightseeing
12th-best month of the year
6.9
Beach & pool
5th-best month of the year

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

What to pack for San Javier in January

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

In January, San Javier sees daytime highs around 31°C and nights near 21°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in San Javier 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 Javier peaks around January 20 at about 13 (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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 20UV 13Jun 19UV 3
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr7High
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5High
Sep7Very high
Oct8Very high
Nov11Extreme
Dec13Extreme

Air quality in San Javier 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 San Javier is worst in August — around 22 µg/m³ PM2.5 (moderate), about 3.8× the cleanest month (May, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1721 µg/m³May 116 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb8Good
Mar6Good
Apr6Good
May6Good
Jun7Good
Jul13Moderate
Aug22Moderate
Sep15Moderate
Oct9Good
Nov6Good
Dec7Good
Location & terrain

Where is San Javier?

San Javier sits at 30.6°S, 59.9°W, 30 m above sea level, in Argentina. The nearest listed city is La Paz, 33 km away.

Topography around San Javier

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

Within 3 km, the terrain around San Javier has only modest variations in elevation — a maximum elevation change of 29 m around an average of 22 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 36 m; within 80 km, only modest variations in elevation — a maximum elevation change of 78 m.

The land around San Javier is covered by wetland (50%) and grassland (20%) within 3 km, wetland (71%) within 16 km, and grassland (27%), wetland (26%) and cropland (23%) within 80 km.

3 km
29 m
16 km
36 m
80 km
78 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: La Paz 33 km · Santa Elena 43 km · San Justo 68 km · Esquina 74 km · Federal 118 km · Vera 128 km · Esperanza 136 km · Santa Fe 140 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 Javier (-30.5807°, -59.9296°, elevation 30 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).