Ramallo weather in September

In September, Ramallo sees average daytime highs of 20°C and overnight lows near 10°C, with 68 mm of rain across 6.2 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 21°C by the end. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Ramallo's 8th-clearest and 1st-windiest month. For the whole year in context, see Ramallo's year-round climate.

Daytime high
20°
8th warmest
Overnight low
10°
4th coldest
Rainfall
68 mm
6.2 wet days
Daylight
11 h 48 min
7:00 AM – 6:48 PM
Cloud cover
48%
8th clearest
Wind
13 km/h
1st windiest
Solar energy
4.68 kWh/m²
Travel score
7.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 19°C in the first days to 21°C by the end.

A typical September day in Ramallo reaches about 20°C in the afternoon and slips back to 10°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 26°C. Set against its neighbours, September runs about 2°C warmer than August and about 3°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
1199
2199
3199
4199
5209
6209
7209
8209
9209
10209
11209
12209
13209
14209
152010
162010
172110
182110
192110
202110
212110
222110
232110
242110
252110
262110
272111
282111
292111
302111

Ramallo weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 19°1007.9145.5
Feb29° / 19°107813.26.0
Mar27° / 17°1107.612.37.1
Apr23° / 13°1068.111.27.3
May19° / 11°675.910.36.7
Jun16° / 465.19.85.7
Jul16° / 445.2105.5
Aug18° / 595.210.86.7
Sep20° / 10°686.211.87.1
Oct23° / 13°1169.912.87.1
Nov26° / 15°1107.813.77.2
Dec29° / 18°106914.26.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25545
35644
45644
55743
65743
75842
85941
96040
106040
116139
126238
136238
146238
156238
166139
176040
186040
195941
205941
215842
225842
235743
245644
255644
265446
275446
285446
295446
305347

Chance of precipitation in September

Any precipitation

Ramallo gets around 68 mm of rain over 6.2 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 21% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
122
222
322
422
522
622
721
821
920
1020
1119
1219
1319
1419
1518
1618
1718
1818
1919
2019
2120
2220
2321
2422
2523
2624
2724
2825
2926
3027

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1811261
2811261
3831160
4831160
5831160
6841060
7841060
8841060
9841060
10841060
11841060
12841060
13851050
14841051
15841051
16841051
17841051
18851041
19851041
20841141
21841141
22831241
23821341
24811351
25801451
26791551
27791551
28771661
29771661
30751771

Wind in September

Winds average 13 km/h in September, the windiest month of the year.

Across September, 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.

051015151015202530
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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 18 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over September. Sunrise moves from 7:22 AM to 6:41 AM, and sunset from 6:38 PM to 6:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:226:38
211.37:206:39
311.37:196:39
411.47:176:40
511.47:166:41
611.47:156:41
711.57:136:42
811.57:126:43
911.57:106:43
1011.67:096:44
1111.67:086:45
1211.77:066:45
1311.77:056:46
1411.77:036:47
1511.87:026:48
1611.87:006:48
1711.86:596:49
1811.96:586:50
1911.96:566:50
2011.96:556:51
2112.06:536:52
2212.06:526:52
2312.06:506:53
2412.16:496:54
2512.16:486:55
2612.26:466:55
2712.26:456:56
2812.26:436:57
2912.36:426:57
3012.36:416:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.68 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 7.34 kWh/m² in December across the year — September's 4.68 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.0Bright
24.1Bright
34.1Bright
44.2Bright
54.2Bright
64.3Bright
74.3Bright
84.4Bright
94.4Bright
104.5Bright
114.5Bright
124.6Bright
134.6Bright
144.7Bright
154.7Bright
164.8Bright
174.8Bright
184.8Bright
194.9Bright
204.9Bright
214.9Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.1Bright
305.1Bright
Planning a trip in September

Is September a good time to visit Ramallo?

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

7.1
Sightseeing
3rd-best month of the year
3.9
Beach & pool
8th-best month of the year

September is one of the better times to visit Ramallo for general sightseeing.

What to pack for Ramallo in September

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

In September, Ramallo sees daytime highs around 20°C and nights near 10°C. Worth packing: sun protection. About 6 days see rain.

sun protection

UV index in Ramallo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Ramallo peaks around January 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 14UV 13Jun 20UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in Ramallo in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Ramallo is worst in August — around 40 µg/m³ PM2.5 (poor), about 6.5× the cleanest month (April, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodAug 1637 µg/m³Apr 156 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb7Good
Mar7Good
Apr6Good
May8Good
Jun10Good
Jul21Moderate
Aug40Poor
Sep17Moderate
Oct13Moderate
Nov8Good
Dec8Good
Location & terrain

Where is Ramallo?

Ramallo sits at 33.5°S, 60.0°W, 23 m above sea level, in Argentina. The nearest listed city is San Nicolás de los Arroyos, 25 km away.

Topography around Ramallo

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

Within 3 km, the terrain around Ramallo has only modest variations in elevation — a maximum elevation change of 42 m around an average of 14 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 49 m; within 80 km, only modest variations in elevation — a maximum elevation change of 87 m.

The land around Ramallo is covered by grassland (27%), cropland (23%) and water (21%) within 3 km, cropland (44%) and wetland (36%) within 16 km, and cropland (50%) and wetland (31%) within 80 km.

3 km
42 m
16 km
49 m
80 km
87 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: San Nicolás de los Arroyos 25 km · San Pedro 38 km · Villa Constitución 41 km · Baradero 59 km · Arroyo Seco 60 km · Arrecifes 65 km · Pergamino 69 km · Gualeguay 75 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 Ramallo (-33.4851°, -60.0063°, elevation 23 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).