Merlo weather in April

In April, Merlo sees average daytime highs of 22°C and overnight lows near 12°C, with 91 mm of rain across 8.1 wet days and about 11.2 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 21°C by the end. The sky is clear or mostly clear about 45% of the time in April, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of April to 10 h 42 min by month's end. Set against the rest of the year, April is Merlo's 6th-clearest and 9th-windiest month. For the whole year in context, see Merlo's year-round climate.

Daytime high
22°
6th warmest
Overnight low
12°
7th coldest
Rainfall
91 mm
8.1 wet days
Daylight
11 h 06 min
7:21 AM – 6:29 PM
Cloud cover
50%
6th clearest
Wind
12 km/h
9th windiest
Solar energy
3.68 kWh/m²
Travel score
7.2
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 April

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 21°C by the end.

A typical April day in Merlo reaches about 22°C in the afternoon and slips back to 12°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 27°C. Set against its neighbours, April runs about 4°C cooler than March and about 4°C warmer than May.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12414
22414
32414
42414
52414
62414
72313
82313
92313
102313
112313
122313
132313
142313
152212
162212
172212
182212
192212
202212
212212
222212
232111
242111
252111
262111
272111
282111
292111
302111

Merlo weather by month

How April compares with the rest of the year at a glance. April is the 6th-warmest and 4th-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 12% of April, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16139
26040
35941
45842
55842
65644
75644
85545
95545
105545
115545
125545
135545
145545
155644
165644
175644
185743
195743
205842
215743
225743
235743
245842
255743
265743
275743
285743
295644
305545

Chance of precipitation in April

Any precipitation

Merlo gets around 91 mm of rain over 8.1 wet days in April. 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 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
125
226
326
427
527
628
728
829
929
1029
1129
1229
1328
1428
1527
1627
1726
1826
1925
2025
2125
2225
2325
2424
2524
2624
2724
2823
2923
3023

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
138272213
239272212
339272212
440272111
541272111
641272110
74227219
84427209
94527208
104626198
114826197
124926187
135026177
145226166
155326156
165426155
175526145
185725135
195725135
205825125
215925124
225925124
236025114
246025114
256124114
266224113
276224113
286223123
296223123
306422122

Wind in April

Winds average 12 km/h in April.

Across April, 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.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
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
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 42 min at the start of April to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over April. Sunrise moves from 7:09 AM to 7:33 AM, and sunset from 6:50 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:096:50
211.67:106:48
311.67:116:47
411.67:126:46
511.57:126:44
611.57:136:43
711.57:146:41
811.47:156:40
911.47:166:39
1011.37:166:37
1111.37:176:36
1211.37:186:34
1311.27:196:33
1411.27:206:32
1511.27:206:30
1611.17:216:29
1711.17:226:28
1811.17:236:26
1911.07:246:25
2011.07:246:24
2111.07:256:23
2210.97:266:21
2310.97:276:20
2410.97:286:19
2510.87:286:18
2610.87:296:17
2710.87:306:15
2810.77:316:14
2910.77:326:13
3010.77:336:12

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 3.68 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 — April's 3.68 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.2Bright
44.1Bright
54.1Bright
64.0Bright
74.0Bright
84.0Moderate
93.9Moderate
103.9Moderate
113.8Moderate
123.8Moderate
133.8Moderate
143.7Moderate
153.7Moderate
163.7Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.4Moderate
253.4Moderate
263.3Moderate
273.3Moderate
283.3Moderate
293.2Moderate
303.2Moderate
Planning a trip in April

Is April a good time to visit Merlo?

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

7.2
Sightseeing
2nd-best month of the year
5.2
Beach & pool
6th-best month of the year

April is one of the better times to visit Merlo for general sightseeing.

What to pack for Merlo in April

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

In April, Merlo sees daytime highs around 22°C and nights near 12°C. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

Sea temperature near Merlo in April

The nearest coast averages about 21°C in April — 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 April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 6 — enough to warrant sun protection. 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 April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April 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
April 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).