Merlo weather in July

In July, Merlo sees average daytime highs of 15°C and overnight lows near 6°C, with 57 mm of rain across 6 wet days and about 9.9 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 15°C through the month. The sky is clear or mostly clear about 35% of the time in July, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of July to 10 h 12 min by month's end. Set against the rest of the year, July is Merlo's 10th-clearest and 6th-windiest month. For the whole year in context, see Merlo's year-round climate.

Daytime high
15°
12th warmest
Overnight low
1st coldest
Rainfall
57 mm
6 wet days
Daylight
9 h 54 min
8:04 AM – 5:57 PM
Cloud cover
56%
10th clearest
Wind
13 km/h
6th windiest
Solar energy
2.44 kWh/m²
Travel score
4.8
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 July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 15°C through the month.

A typical July day in Merlo reaches about 15°C in the afternoon and slips back to 6°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 19°C. Set against its neighbours, July runs about 1°C cooler than June and about 2°C cooler than August.

10°20°151015202531
Avg high (°C)Avg low (°C)
1146
2146
3146
4146
5146
6146
7146
8145
9145
10145
11145
12145
13145
14145
15145
16145
17145
18145
19145
20155
21156
22156
23156
24156
25156
26156
27156
28156
29156
30156
31156

Merlo weather by month

How July compares with the rest of the year at a glance. July is the 12th-warmest and 12th-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 13% of July, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24852
34852
44852
54852
64852
74852
84951
94951
104951
114951
124951
134951
144951
154951
164951
174951
184951
194951
204951
214951
224852
234852
244852
254852
264753
274753
284852
294852
304852
314852

Chance of precipitation in July

Any precipitation

Merlo gets around 57 mm of rain over 6 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 21% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
120
220
321
421
521
621
721
821
921
1020
1120
1219
1319
1419
1519
1618
1718
1818
1918
2017
2117
2217
2318
2418
2518
2618
2718
2818
2918
3018
3118

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the dry band about 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19172
29172
39172
49172
59172
69172
79172
89082
99181
109181
119271
129271
139271
149271
159271
169271
179271
189271
199271
209271
219271
229271
239271
249271
259271
269181
279181
289181
299181
309181
319181

Wind in July

Winds average 13 km/h in July.

Across July, daily wind ranges from about 12 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
112light breeze
212light 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 July

DaylightNight

Daylight runs from about 9 h 42 min at the start of July to 10 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over July. Sunrise moves from 8:07 AM to 7:54 AM, and sunset from 5:49 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.78:075:49
29.78:075:50
39.78:075:50
49.78:075:51
59.78:075:51
69.78:075:52
79.88:075:52
89.88:065:53
99.88:065:53
109.88:065:54
119.88:065:54
129.88:055:55
139.88:055:55
149.98:055:56
159.98:045:57
169.98:045:57
179.98:035:58
189.98:035:58
199.98:035:59
2010.08:026:00
2110.08:016:00
2210.08:016:01
2310.08:006:02
2410.08:006:02
2510.17:596:03
2610.17:586:04
2710.17:586:05
2810.17:576:05
2910.27:566:06
3010.27:556:07
3110.27:546:08

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 2.44 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 — July's 2.44 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.2Moderate
22.2Moderate
32.3Moderate
42.3Moderate
52.3Moderate
62.3Moderate
72.3Moderate
82.3Moderate
92.3Moderate
102.3Moderate
112.4Moderate
122.4Moderate
132.4Moderate
142.4Moderate
152.4Moderate
162.4Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.6Moderate
232.6Moderate
242.6Moderate
252.6Moderate
262.7Moderate
272.7Moderate
282.7Moderate
292.7Moderate
302.8Moderate
312.8Moderate
Planning a trip in July

Is July a good time to visit Merlo?

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

4.8
Sightseeing
12th-best month of the year
0.0
Beach & pool
12th-best month of the year

July is a reasonable time to visit Merlo for sightseeing.

What to pack for Merlo in July

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

In July, Merlo sees daytime highs around 15°C and nights near 6°C. Worth packing: a warm layer. About 6 days see rain.

a warm layer

Sea temperature near Merlo in July

The nearest coast averages about 13°C in July — 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 July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 3. 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 July

GoodModeratePoorUnhealthyVery unhealthy

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