Río Segundo weather in September

In September, Río Segundo sees average daytime highs of 22°C and overnight lows near 9°C, with 30 mm of rain across 4.4 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 21°C in the first days to 23°C by the end. The sky is clear or mostly clear about 59% 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 Río Segundo's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Río Segundo's year-round climate.

Daytime high
22°
8th warmest
Overnight low
4th coldest
Rainfall
30 mm
4.4 wet days
Daylight
11 h 48 min
7:16 AM – 7:04 PM
Cloud cover
36%
2nd clearest
Wind
12 km/h
2nd windiest
Solar energy
5.06 kWh/m²
Travel score
8.0
out of 10

Río Segundo is human settlement in Argentina.

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 21°C in the first days to 23°C by the end.

A typical September day in Río Segundo reaches about 22°C in the afternoon and slips back to 9°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 28°C. Set against its neighbours, September runs about 3°C warmer than August and about 3°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
1218
2218
3218
4219
5219
6219
7219
8219
9229
10229
11229
12229
13229
14229
15229
16229
17229
18229
192310
202310
212310
222310
232310
242310
252310
262310
272310
282311
292311
302311

Río Segundo 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°10810.113.85.3
Feb28° / 18°899.813.26.3
Mar26° / 16°899.212.27.0
Apr23° / 13°61711.27.6
May20° / 294.310.47.2
Jun17° / 153106.5
Jul16° / 122.510.16.5
Aug19° / 152.410.87.7
Sep22° / 304.411.88.0
Oct25° / 13°688.212.87.4
Nov28° / 16°839.713.66.5
Dec30° / 18°10210.8145.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 26%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27327
37327
47327
57327
67327
77426
87426
97525
107723
117723
127822
137822
147822
157822
167822
177723
187723
197525
207525
217426
227327
237327
247129
257030
266931
276832
286832
296634
306634

Chance of precipitation in September

Any precipitation

Río Segundo gets around 30 mm of rain over 4.4 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 15% and peaks near 21% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
111
212
312
412
513
613
713
813
913
1013
1113
1213
1313
1413
1513
1613
1714
1814
1914
2015
2115
2216
2317
2418
2518
2619
2720
2820
2921
3021

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 90% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19271
29181
39181
49181
59181
69181
79271
89271
99271
109271
119271
129361
139361
149361
159361
169361
179361
189262
199172
209172
219082
229082
238992
2488102
2588102
2687112
2786113
2885123
2985123
3085123

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

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 7:36 AM to 6:57 AM, and sunset from 6:55 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:366:55
211.47:346:56
311.47:336:56
411.47:326:57
511.47:316:57
611.57:296:58
711.57:286:59
811.57:276:59
911.67:257:00
1011.67:247:01
1111.67:227:01
1211.77:217:02
1311.77:207:02
1411.77:187:03
1511.87:177:04
1611.87:167:04
1711.87:147:05
1811.97:137:05
1911.97:127:06
2011.97:107:07
2112.07:097:07
2212.07:087:08
2312.07:067:09
2412.17:057:09
2512.17:037:10
2612.17:027:11
2712.27:017:11
2812.26:597:12
2912.26:587:12
3012.36:577:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.06 kWh/m².

For context, solar energy here swings from a low near 2.78 kWh/m² to a high of 7.03 kWh/m² in December across the year — September's 5.06 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.6Bright
44.6Bright
54.7Bright
64.7Bright
74.8Bright
84.8Bright
94.8Bright
104.9Bright
114.9Bright
125.0Bright
135.0Bright
145.1Bright
155.1Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in September

Hazard calendar for Río Segundo

In seasonPeak

None of Río Segundo's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Río Segundo's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Río Segundo?

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

8.0
Sightseeing
1st-best month of the year
5.6
Beach & pool
8th-best month of the year

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

What to pack for Río Segundo in September

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

In September, Río Segundo sees daytime highs around 22°C and nights near 9°C. Worth packing: light clothes and sun protection. About 4 days see rain.

light clothessun protection

UV index in Río Segundo 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 Río Segundo peaks around January 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeHighModerateHighVery highExtremeJan 19UV 14Jun 21UV 3
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr6High
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep7High
Oct10Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Río Segundo?

Río Segundo sits at 31.7°S, 63.9°W, 343 m above sea level, in Argentina. The nearest listed city is Pilar, 4.0 km away.

Topography around Río Segundo

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

Within 3 km, the terrain around Río Segundo has only modest variations in elevation — a maximum elevation change of 28 m around an average of 339 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 96 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,998 m.

The land around Río Segundo is covered by cropland (41%) and grassland (29%) within 3 km, cropland (91%) within 16 km, and cropland (74%) within 80 km.

3 km
28 m
16 km
96 m
80 km
1,998 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Pilar 4.0 km · Villa del Rosario 37 km · Cordoba 38 km · Alta Gracia 49 km · La Calera 53 km · Villa Allende 54 km · Unquillo 60 km · Villa Carlos Paz 61 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 Río Segundo (-31.6501°, -63.9117°, elevation 343 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).