Merlo weather in March

In March, Merlo sees average daytime highs of 26°C and overnight lows near 16°C, with 85 mm of rain across 7.5 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 25°C by the end. The sky is clear or mostly clear about 47% 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 Merlo's 4th-clearest and 10th-windiest month. For the whole year in context, see Merlo's year-round climate.

Daytime high
26°
4th warmest
Overnight low
16°
9th coldest
Rainfall
85 mm
7.5 wet days
Daylight
12 h 18 min
6:56 AM – 7:13 PM
Cloud cover
46%
4th clearest
Wind
12 km/h
10th windiest
Solar energy
5.03 kWh/m²
Travel score
7.3
out of 10

Merlo is city in the province of Buenos Aires in Argentina.

Founded
1755

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 25°C by the end.

A typical March day in Merlo reaches about 26°C in the afternoon and slips back to 16°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 31°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)
12817
22717
32717
42717
52717
62717
72717
82717
92717
102717
112717
122717
132616
142616
152616
162616
172616
182616
192616
202616
212615
222615
232515
242515
252515
262515
272515
282515
292515
302514
312414

Merlo 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° / 18°887.714.15.9
Feb28° / 18°938.313.36.4
Mar26° / 16°857.512.37.3
Apr22° / 12°918.111.27.2
May18° / 626.210.26.5
Jun15° / 585.99.75.1
Jul15° / 5769.94.8
Aug17° / 605.910.75.9
Sep19° / 716.811.86.6
Oct22° / 12°1119.312.96.8
Nov25° / 14°928.413.87.2
Dec28° / 17°878.614.36.5

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% 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 38%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16436
26337
36337
46238
56238
66238
76139
86139
96139
106040
116040
126040
135941
145941
155941
166040
176040
186139
196139
206238
216337
226337
236436
246436
256436
266436
276436
286337
296337
306238
316238

Chance of precipitation in March

Any precipitation

Merlo gets around 85 mm of rain over 7.5 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 26% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
126
226
326
426
526
626
726
825
925
1025
1125
1225
1325
1425
1524
1624
1724
1824
1924
2024
2123
2223
2323
2423
2523
2623
2723
2823
2923
3024
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 23% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1162030268
2162031257
3172031257
4172032257
5171932247
6171932247
7182032247
8182032247
9182032236
10192032236
11192032226
12202032226
13212132215
14222132215
15232131204
16242231204
17262230193
18272230183
19282329182
20292329172
21302329171
22312428161
23322428161
24322527161
25332526150
26342525150
27352625150
28352624140
29362623140
30372623140
31372722130

Wind in March

Winds average 12 km/h in March.

Across March, daily wind ranges from about 12 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
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light 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 6:44 AM to 7:09 AM, and sunset from 7:33 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:447:33
212.86:457:31
312.76:457:30
412.76:467:29
512.76:477:28
612.66:487:26
712.66:497:25
812.66:507:24
912.56:517:22
1012.56:517:21
1112.56:527:20
1212.46:537:18
1312.46:547:17
1412.36:557:15
1512.36:567:14
1612.36:567:13
1712.26:577:11
1812.26:587:10
1912.26:597:08
2012.17:007:07
2112.17:017:06
2212.07:017:04
2312.07:027:03
2412.07:037:01
2511.97:047:00
2611.97:056:58
2711.97:056:57
2811.87:066:56
2911.87:076:54
3011.77:086:53
3111.77:096:51

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 5.03 kWh/m².

For context, solar energy here swings from a low near 2.24 kWh/m² to a high of 7.45 kWh/m² in December across the year — March's 5.03 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
115.2Bright
125.2Bright
135.1Bright
145.1Bright
155.0Bright
165.0Bright
175.0Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.7Bright
244.7Bright
254.6Bright
264.6Bright
274.5Bright
284.5Bright
294.5Bright
304.4Bright
314.3Bright
Planning a trip in March

Is March a good time to visit Merlo?

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

7.3
Sightseeing
1st-best month of the year
6.9
Beach & pool
4th-best month of the year

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

What to pack for Merlo in March

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

In March, Merlo sees daytime highs around 26°C and nights near 16°C. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

Sea temperature near Merlo 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 33 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 Merlo in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Merlo peaks around January 13 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 13UV 12Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar9Very high
Apr6High
May3Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in Merlo 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 Merlo 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 Merlo?

Merlo sits at 34.7°S, 58.7°W, 13 m above sea level, in Argentina. The nearest listed city is San Antonio de Padua, 3.0 km away.

Topography around Merlo

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

Within 3 km, the terrain around Merlo has only modest variations in elevation — a maximum elevation change of 30 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 50 m; within 80 km, only modest variations in elevation — a maximum elevation change of 84 m.

The land around Merlo is covered by artificial surfaces (75%) within 3 km, artificial surfaces (47%) and trees (23%) within 16 km, and grassland (30%) and cropland (27%) within 80 km.

3 km
30 m
16 km
50 m
80 km
84 m
treesgrasslandcroplandartificial surfaceswaterwetland
March weather nearby: San Antonio de Padua 3.0 km · Moreno 7.0 km · Castelar 8.0 km · Pontevedra 10 km · Morón 10 km · Bella Vista 12 km · Hurlingham 12 km · Muñiz 12 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 Merlo (-34.6654°, -58.7274°, elevation 13 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).