Zárate weather in September

In September, Zárate sees average daytime highs of 20°C and overnight lows near 9°C, with 75 mm of rain across 6.5 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 20°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 Zárate's 8th-clearest and 1st-windiest month. For the whole year in context, see Zárate's year-round climate.

Daytime high
20°
8th warmest
Overnight low
4th coldest
Rainfall
75 mm
6.5 wet days
Daylight
11 h 48 min
6:57 AM – 6:44 PM
Cloud cover
52%
8th clearest
Wind
14 km/h
1st windiest
Solar energy
4.57 kWh/m²
Travel score
6.8
out of 10

Zárate is city in Buenos Aires Province, Argentina.

Founded
1854

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 19°C in the first days to 20°C by the end.

A typical September day in Zárate reaches about 20°C in the afternoon and slips back to 9°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 25°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
5199
6199
7199
8199
9199
10199
11199
12199
13199
14209
15209
16209
17209
18209
192010
202010
212010
222010
232010
242010
252010
262010
272010
282010
292111
302111

Zárate 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°957.7145.7
Feb28° / 18°1108.613.36.1
Mar26° / 16°1087.512.37.2
Apr23° / 13°103811.27.3
May19° / 10°705.810.36.6
Jun16° / 566.29.85.5
Jul15° / 595.9105.2
Aug18° / 69610.76.3
Sep20° / 756.511.86.8
Oct22° / 12°1319.312.97.0
Nov26° / 15°1037.713.87.3
Dec28° / 17°1048.714.26.3

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 13% of September, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15248
25248
35248
45347
55347
65446
75545
85545
95644
105644
115644
125743
135743
145743
155743
165743
175743
185644
195644
205545
215446
225446
235347
245248
255248
265149
275149
285050
295050
305050

Chance of precipitation in September

Any precipitation

Zárate gets around 75 mm of rain over 6.5 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 22% and peaks near 25% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
124
224
324
423
523
623
723
822
922
1022
1121
1221
1321
1421
1520
1620
1720
1820
1920
2021
2121
2221
2322
2422
2523
2623
2723
2824
2924
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 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1811351
2821251
3821251
4821251
5811261
6821161
7821161
8821161
9821161
10821161
11821161
12821161
13821161
14821161
15821161
16831151
17831151
18831151
19821251
20821251
21811351
22801451
23801451
24791551
25781651
26771751
27761761
28751861
29761860
30741970

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 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 7:18 AM to 6:36 AM, and sunset from 6:33 PM to 6:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:186:33
211.37:176:34
311.37:156:35
411.47:146:36
511.47:136:36
611.47:116:37
711.57:106:38
811.57:086:38
911.57:076:39
1011.67:056:40
1111.67:046:41
1211.67:036:41
1311.77:016:42
1411.77:006:43
1511.86:586:43
1611.86:576:44
1711.86:556:45
1811.96:546:46
1911.96:526:46
2011.96:516:47
2112.06:496:48
2212.06:486:48
2312.06:466:49
2412.16:456:50
2512.16:446:51
2612.26:426:51
2712.26:416:52
2812.26:396:53
2912.36:386:54
3012.36:366:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.57 kWh/m².

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 7.42 kWh/m² in December across the year — September's 4.57 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
34.0Moderate
44.0Bright
54.1Bright
64.1Bright
74.2Bright
84.2Bright
94.3Bright
104.3Bright
114.4Bright
124.5Bright
134.5Bright
144.5Bright
154.6Bright
164.6Bright
174.7Bright
184.7Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Is September a good time to visit Zárate?

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

6.8
Sightseeing
5th-best month of the year
3.3
Beach & pool
8th-best month of the year

September is a reasonable time to visit Zárate for sightseeing.

What to pack for Zárate in September

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

In September, Zárate sees daytime highs around 20°C and nights near 9°C. Worth packing: sun protection. About 7 days see rain.

sun protection

Sea temperature near Zárate in September

The nearest coast averages about 15°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 60 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 8 to Apr 22 — about 5.5 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb25Warm
Mar24Refreshing
Apr21Refreshing
May17Cool
Jun14Bracing
Jul13Bracing
Aug14Bracing
Sep15Cool
Oct18Cool
Nov21Refreshing
Dec23Refreshing

UV index in Zárate 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 Zárate 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
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in Zárate 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 Zárate is worst in August — around 22 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (April, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1721 µg/m³Apr 157 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb8Good
Mar9Good
Apr7Good
May9Good
Jun10Good
Jul13Moderate
Aug22Moderate
Sep14Moderate
Oct12Moderate
Nov8Good
Dec8Good
Location & terrain

Where is Zárate?

Zárate sits at 34.1°S, 59.0°W, 27 m above sea level, in Argentina. The nearest listed city is Campana, 10 km away.

Topography around Zárate

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

Within 3 km, the terrain around Zárate has only modest variations in elevation — a maximum elevation change of 42 m around an average of 15 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 57 m; within 80 km, only modest variations in elevation — a maximum elevation change of 83 m.

The land around Zárate is covered by artificial surfaces (42%) within 3 km, wetland (30%), grassland (23%) and cropland (23%) within 16 km, and cropland (30%) and wetland (29%) within 80 km.

3 km
42 m
16 km
57 m
80 km
83 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Campana 10 km · Pilar 42 km · San Antonio de Areco 44 km · Tortuguitas 49 km · Ingeniero Pablo Nogués 52 km · José C. Paz 52 km · General Pacheco 53 km · Luján 53 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 Zárate (-34.0958°, -59.0242°, elevation 27 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).