San Justo weather in March

In March, San Justo sees average daytime highs of 26°C and overnight lows near 17°C, with 85 mm of rain across 7.4 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 48% of the time in March, and the air most often feels humid.

Daylight stretches from about 12 h 48 min at the start of March to 11 h 42 min by month's end. Set against the rest of the year, March is San Justo's 4th-clearest and 11th-windiest month. For the whole year in context, see San Justo's year-round climate.

Daytime high
26°
4th warmest
Overnight low
17°
9th coldest
Rainfall
85 mm
7.4 wet days
Daylight
12 h 18 min
6:56 AM – 7:12 PM
Cloud cover
45%
4th clearest
Wind
13 km/h
11th windiest
Solar energy
5.05 kWh/m²
Travel score
7.4
out of 10

San Justo is city in Buenos Aires province, Argentina.

Density
6,958/km²
people per km²
Founded
1856

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 24°C by the end.

A typical March day in San Justo reaches about 26°C in the afternoon and slips back to 17°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 30°C. Set against its neighbours, March runs about 2°C cooler than February and about 4°C warmer than April.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12718
22718
32718
42718
52718
62718
72718
82617
92617
102617
112617
122617
132617
142617
152617
162617
172617
182516
192516
202516
212516
222516
232516
242516
252516
262515
272515
282415
292415
302415
312415

San Justo weather by month

How March compares with the rest of the year at a glance. March is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 19°877.414.16.3
Feb28° / 18°928.213.36.8
Mar26° / 17°857.412.37.4
Apr22° / 13°917.911.27.2
May18° / 10°616.110.26.4
Jun15° / 605.99.75.0
Jul14° / 606.19.94.6
Aug16° / 625.810.75.7
Sep18° / 726.711.86.4
Oct21° / 12°1099.112.96.7
Nov24° / 15°938.413.87.3
Dec27° / 17°858.614.36.8

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 15% of March, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26535
36535
46436
56436
66436
76337
86337
96337
106238
116139
126139
136139
146139
156238
166238
176238
186238
196337
206337
216436
226436
236436
246535
256535
266634
276535
286535
296436
306436
316337

Chance of precipitation in March

Any precipitation

San Justo gets around 85 mm of rain over 7.4 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
127
226
326
426
526
626
726
826
925
1025
1125
1225
1325
1425
1524
1624
1724
1824
1923
2023
2123
2223
2323
2422
2522
2622
2722
2822
2923
3023
3124

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

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

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11217302911
21218302910
31218312910
41318312910
5131831299
6141730299
7141730299
8141731298
9151731298
10161731298
11161731288
12171731287
13181730277
14191830276
15201830265
16211930255
17231929254
18242029243
19242029243
20252128232
21262228232
22272228221
23272327221
24282327211
25282427211
26292426200
27302426190
28302526190
29312526180
30322526170
31322526170

Wind in March

Winds average 13 km/h in March.

Across March, 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.

051015151015202531
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 March

DaylightNight

Daylight runs from about 12 h 48 min at the start of March to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over March. Sunrise moves from 6:43 AM to 7:08 AM, and sunset from 7:32 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:437:32
212.86:447:31
312.76:457:29
412.76:467:28
512.76:477:27
612.66:477:26
712.66:487:24
812.66:497:23
912.56:507:22
1012.56:517:20
1112.56:527:19
1212.46:537:18
1312.46:537:16
1412.36:547:15
1512.36:557:13
1612.36:567:12
1712.26:577:11
1812.26:577:09
1912.26:587:08
2012.16:597:06
2112.17:007:05
2212.07:017:03
2312.07:027:02
2412.07:027:01
2511.97:036:59
2611.97:046:58
2711.97:056:56
2811.87:056:55
2911.87:066:53
3011.77:076:52
3111.77:086:51

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 5.05 kWh/m².

For context, solar energy here swings from a low near 2.24 kWh/m² to a high of 7.47 kWh/m² in December across the year — March's 5.05 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.3Bright
125.2Bright
135.2Bright
145.1Bright
155.1Bright
165.0Bright
175.0Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.7Bright
244.7Bright
254.6Bright
264.6Bright
274.6Bright
284.5Bright
294.5Bright
304.4Bright
314.4Bright
Planning a trip in March

Is March a good time to visit San Justo?

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

7.4
Sightseeing
1st-best month of the year
6.8
Beach & pool
4th-best month of the year

March is one of the better times to visit San Justo for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for San Justo in March

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

In March, San Justo sees daytime highs around 26°C and nights near 17°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near San Justo in March

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

The sea at the nearest coast (about 18 km away) is warmest in January at about 25°C and coldest in July near 13°C.

It's comfortable for a long swim from Nov 9 to Apr 20 — about 5.4 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb25Warm
Mar23Refreshing
Apr21Refreshing
May17Cool
Jun14Bracing
Jul13Bracing
Aug13Bracing
Sep15Cool
Oct18Cool
Nov21Refreshing
Dec23Refreshing

UV index in San Justo in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 10 (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 Justo peaks around January 14 at about 12 (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 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 14UV 12Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May3Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in San Justo in March

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.

Air quality in San Justo is worst in June — around 25 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2325 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb14Moderate
Mar16Moderate
Apr17Moderate
May22Moderate
Jun25Moderate
Jul25Moderate
Aug24Moderate
Sep19Moderate
Oct16Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is San Justo?

San Justo sits at 34.7°S, 58.6°W, 29 m above sea level, in Argentina. The nearest listed city is Isidro Casanova, 3.0 km away.

Topography around San Justo

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

Within 3 km, the terrain around San Justo has only modest variations in elevation — a maximum elevation change of 28 m around an average of 28 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 53 m; within 80 km, only modest variations in elevation — a maximum elevation change of 138 m.

The land around San Justo is covered by artificial surfaces (89%) within 3 km, artificial surfaces (70%) within 16 km, and grassland (31%), cropland (24%) and water (20%) within 80 km.

3 km
28 m
16 km
53 m
80 km
138 m
treesgrasslandcroplandartificial surfaceswaterwetland
March weather nearby: Isidro Casanova 3.0 km · Haedo 5.0 km · Villa Sarmiento 5.0 km · Morón 6.0 km · Castelar 8.0 km · El Palomar 8.0 km · Villa Lugano 8.0 km · Santos Lugares 9.0 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 Justo (-34.6811°, -58.5638°, elevation 29 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. 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).