Gualeguay weather in September

In September, Gualeguay sees average daytime highs of 21°C and overnight lows near 10°C, with 78 mm of rain across 6.8 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 20°C in the first days to 21°C by the end. The sky is clear or mostly clear about 42% 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 Gualeguay's 8th-clearest and 1st-windiest month. For the whole year in context, see Gualeguay's year-round climate.

Daytime high
21°
8th warmest
Overnight low
10°
4th coldest
Rainfall
78 mm
6.8 wet days
Daylight
11 h 48 min
6:58 AM – 6:46 PM
Cloud cover
50%
8th clearest
Wind
13 km/h
1st windiest
Solar energy
4.6 kWh/m²
Travel score
7.0
out of 10

Gualeguay is city in Entre Ríos Province, Argentina.

Founded
1783

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 20°C in the first days to 21°C by the end.

A typical September day in Gualeguay reaches about 21°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)
1209
2209
3209
4209
5209
6209
7209
8209
9209
10209
11209
12209
13209
14209
152010
162110
172110
182110
192110
202110
212110
222110
232110
242110
252110
262110
272111
282111
292111
302211

Gualeguay 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°1077.413.95.3
Feb29° / 18°1108.113.25.8
Mar27° / 17°1227.812.37.0
Apr23° / 13°1118.211.27.3
May20° / 10°756.110.36.8
Jun17° / 576.49.95.8
Jul16° / 535.4105.7
Aug18° / 715.910.86.7
Sep21° / 10°786.811.87.0
Oct23° / 13°1199.812.87.1
Nov26° / 15°1097.413.77.1
Dec29° / 17°1209.114.15.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25446
35446
45446
55545
65644
75743
85842
95842
106040
116040
126040
136040
146040
156040
166040
176040
186040
195941
206040
215941
225842
235644
245644
255545
265446
275347
285347
295149
305149

Chance of precipitation in September

Any precipitation

Gualeguay gets around 78 mm of rain over 6.8 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 23% and peaks near 25% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
125
225
325
425
525
625
725
824
924
1023
1122
1222
1321
1421
1521
1620
1720
1820
1920
2020
2121
2221
2321
2422
2523
2623
2724
2824
2925
3025

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 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1791371
2791371
3791371
4791371
5801271
6801271
7801271
8801271
9801271
10801271
11801271
12801271
13811261
14811261
15811261
16801361
17811351
18811351
19811351
20811351
21801451
22801451
23791551
24771661
25771661
26761761
27761761
28741871
29741871
30721981

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.

05101520151015202530
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 7:19 AM to 6:38 AM, and sunset from 6:35 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:196:35
211.37:176:36
311.37:166:37
411.47:146:37
511.47:136:38
611.57:126:39
711.57:106:39
811.57:096:40
911.67:086:41
1011.67:066:41
1111.67:056:42
1211.77:036:43
1311.77:026:43
1411.77:006:44
1511.86:596:45
1611.86:586:46
1711.86:566:46
1811.96:556:47
1911.96:536:48
2011.96:526:48
2112.06:516:49
2212.06:496:50
2312.06:486:50
2412.16:466:51
2512.16:456:52
2612.16:436:52
2712.26:426:53
2812.26:416:54
2912.36:396:55
3012.36:386:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.6 kWh/m².

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 7.33 kWh/m² in December across the year — September's 4.6 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.0Moderate
24.0Moderate
34.0Bright
44.1Bright
54.1Bright
64.2Bright
74.2Bright
84.3Bright
94.3Bright
104.4Bright
114.4Bright
124.5Bright
134.5Bright
144.6Bright
154.6Bright
164.7Bright
174.7Bright
184.8Bright
194.8Bright
204.8Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Is September a good time to visit Gualeguay?

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

7.0
Sightseeing
4th-best month of the year
4.0
Beach & pool
8th-best month of the year

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

What to pack for Gualeguay in September

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

In September, Gualeguay sees daytime highs around 21°C and nights near 10°C. Worth packing: sun protection. About 7 days see rain.

sun protection

UV index in Gualeguay 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 Gualeguay peaks around January 15 at about 13 (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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 15UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Extreme
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in Gualeguay 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 Gualeguay is worst in August — around 19 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (April, 5 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1718 µg/m³Apr 145 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb6Good
Mar6Good
Apr5Good
May7Good
Jun7Good
Jul12Good
Aug19Moderate
Sep12Good
Oct10Good
Nov6Good
Dec6Good
Location & terrain

Where is Gualeguay?

Gualeguay sits at 33.1°S, 59.3°W, 13 m above sea level, in Argentina. The nearest listed city is San Pedro, 68 km away.

Topography around Gualeguay

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

Within 3 km, the terrain around Gualeguay has only modest variations in elevation — a maximum elevation change of 24 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 59 m; within 80 km, only modest variations in elevation — a maximum elevation change of 95 m.

The land around Gualeguay is covered by grassland (60%) and artificial surfaces (23%) within 3 km, grassland (60%) and cropland (29%) within 16 km, and wetland (33%), cropland (32%) and grassland (29%) within 80 km.

3 km
24 m
16 km
59 m
80 km
95 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: San Pedro 68 km · Ramallo 75 km · Gualeguaychú 75 km · Baradero 77 km · San Nicolás de los Arroyos 86 km · Fray Bentos 93 km · Nogoyá 94 km · Villa Constitución 95 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 Gualeguay (-33.1409°, -59.3126°, 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. 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).