Avellaneda weather in September

In September, Avellaneda sees average daytime highs of 24°C and overnight lows near 13°C, with 92 mm of rain across 7.1 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Avellaneda's 2nd-clearest and 1st-windiest month. For the whole year in context, see Avellaneda's year-round climate.

Daytime high
24°
8th warmest
Overnight low
13°
4th coldest
Rainfall
92 mm
7.1 wet days
Daylight
11 h 48 min
6:58 AM – 6:48 PM
Cloud cover
44%
2nd clearest
Wind
14 km/h
1st windiest
Solar energy
4.79 kWh/m²
Travel score
7.7
out of 10

Avellaneda is town in Santa Fe Province, Argentina.

Density
25/km²
people per km²
Founded
1879

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical September day in Avellaneda reaches about 24°C in the afternoon and slips back to 13°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 31°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12312
22312
32312
42312
52412
62412
72412
82412
92412
102412
112412
122412
132412
142412
152413
162413
172413
182413
192413
202413
212413
222413
232413
242513
252513
262514
272514
282514
292514
302514

How September really feels in Avellaneda

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Avellaneda 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
Jan32° / 21°13910.513.74.3
Feb31° / 21°1209.7134.7
Mar29° / 19°1259.612.25.7
Apr26° / 16°1479.411.37.0
May22° / 13°847.410.67.1
Jun20° / 11°67710.26.7
Jul19° / 465.510.37.1
Aug22° / 11°645.7117.7
Sep24° / 13°927.111.87.7
Oct26° / 16°14710.612.76.7
Nov28° / 18°1419.213.56.1
Dec31° / 20°1559.913.84.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16634
26535
36535
46535
56436
66337
76337
86337
96337
106436
116337
126337
136436
146436
156436
166436
176436
186436
196436
206436
216436
226337
236337
246337
256238
266139
276040
286040
295842
305842

Chance of precipitation in September

Any precipitation

Avellaneda gets around 92 mm of rain over 7.1 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 24% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
123
223
324
424
524
624
724
824
924
1024
1124
1224
1323
1423
1523
1622
1722
1822
1922
2022
2122
2223
2323
2424
2525
2625
2726
2827
2928
3029

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
162191540
262191540
362191540
462191540
561191550
662181550
762181550
863181450
963181450
1063181450
1163181450
1264181350
1364181350
1464181350
1564181350
1663181360
1763181360
1863181360
1963181360
2062191360
2161191370
2260201370
2358201480
2457211480
2555211590
2655211590
27522215101
28522215101
29502216111
30492216111

Wind in September

Winds average 14 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 24 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over September. Sunrise moves from 7:17 AM to 6:41 AM, and sunset from 6:40 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:176:40
211.47:166:40
311.47:146:41
411.57:136:42
511.57:126:42
611.57:116:43
711.67:096:43
811.67:086:44
911.67:076:44
1011.67:066:45
1111.77:046:45
1211.77:036:46
1311.77:026:46
1411.87:016:47
1511.86:596:47
1611.86:586:48
1711.96:576:48
1811.96:566:49
1911.96:546:49
2011.96:536:50
2112.06:526:50
2212.06:516:51
2312.06:496:51
2412.16:486:52
2512.16:476:53
2612.16:456:53
2712.26:446:54
2812.26:436:54
2912.26:426:55
3012.26:416:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.79 kWh/m².

For context, solar energy here swings from a low near 2.54 kWh/m² to a high of 6.98 kWh/m² in December across the year — September's 4.79 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.4Bright
44.4Bright
54.4Bright
64.5Bright
74.5Bright
84.5Bright
94.6Bright
104.6Bright
114.6Bright
124.7Bright
134.7Bright
144.8Bright
154.8Bright
164.8Bright
174.9Bright
184.9Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.2Bright
305.2Bright
Planning a trip in September

Is September a good time to visit Avellaneda?

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

7.7
Sightseeing
1st-best month of the year
6.4
Beach & pool
8th-best month of the year

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

What to pack for Avellaneda in September

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

In September, Avellaneda sees daytime highs around 24°C and nights near 13°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

UV index in Avellaneda in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Avellaneda peaks around January 24 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 24UV 14Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr7Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug6High
Sep7Very high
Oct9Very high
Nov11Extreme
Dec13Extreme
Location & terrain

Where is Avellaneda?

Avellaneda sits at 29.1°S, 59.7°W, 52 m above sea level, in Argentina. The nearest listed city is Reconquista, 4.0 km away.

Topography around Avellaneda

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

Within 3 km, the terrain around Avellaneda has only modest variations in elevation — a maximum elevation change of 23 m around an average of 44 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 37 m; within 80 km, only modest variations in elevation — a maximum elevation change of 70 m.

The land around Avellaneda is covered by cropland (38%) and artificial surfaces (28%) within 3 km, cropland (32%), wetland (26%) and grassland (20%) within 16 km, and trees (31%), grassland (29%) and wetland (22%) within 80 km.

3 km
23 m
16 km
37 m
80 km
70 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Reconquista 4.0 km · Goya 38 km · Vera 66 km · Villa Ocampo 76 km · Esquina 101 km · Saladas 139 km · San Lorenzo 140 km · Mercedes 154 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 Avellaneda (-29.1176°, -59.6583°, elevation 52 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).