San Pedro weather in September

In September, San Pedro sees average daytime highs of 24°C and overnight lows near 14°C, with 180 mm of rain across 11.5 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 4th-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 43% 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 San Pedro's 3rd-clearest and 3rd-windiest month. For the whole year in context, see San Pedro's year-round climate.

Daytime high
24°
8th warmest
Overnight low
14°
5th coldest
Rainfall
180 mm
11.5 wet days
Daylight
11 h 48 min
6:35 AM – 6:26 PM
Cloud cover
50%
3rd clearest
Wind
11 km/h
3rd windiest
Solar energy
4.69 kWh/m²
Travel score
6.9
out of 10

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 San Pedro reaches about 24°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 31°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12414
22414
32414
42414
52414
62414
72414
82414
92414
102414
112414
122414
132414
142414
152414
162414
172414
182414
192414
202414
212414
222414
232414
242414
252414
262414
272415
282515
292515
302515

San Pedro weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°18619.313.54.3
Feb28° / 19°17517.812.94.5
Mar28° / 18°16115.512.25.5
Apr25° / 16°15211.611.46.6
May21° / 13°16210.510.76.6
Jun20° / 12°1639.810.46.4
Jul20° / 11°1409.710.56.6
Aug23° / 13°1087.711.17.5
Sep24° / 14°18011.511.86.9
Oct26° / 16°2341512.65.9
Nov27° / 17°17513.613.35.9
Dec29° / 19°20117.413.64.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 44%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16337
26337
36238
46238
56139
66139
76040
85842
95842
105842
115842
125842
135743
145743
155743
165644
175644
185644
195545
205545
215347
225347
235248
245248
255149
265050
274951
284852
294852
304654

Chance of precipitation in September

Any precipitation

San Pedro gets around 180 mm of rain over 11.5 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 38% and peaks near 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
127
228
329
430
531
632
733
834
935
1035
1136
1237
1338
1438
1539
1640
1740
1841
1941
2042
2142
2243
2343
2444
2544
2644
2744
2844
2944
3045

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 41% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15034142
25034152
34934152
44934162
54834162
64733172
74733172
84633183
94533193
104433203
114433213
124333213
134232223
144132233
154132244
164031244
174031254
184030264
193930265
203929275
213829285
223828295
233728306
243628316
253528316
263427327
273327337
283227338
293127348
303027359

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:53 AM to 6:19 AM, and sunset from 6:20 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:536:20
211.56:526:20
311.56:506:20
411.56:496:21
511.66:486:21
611.66:476:22
711.66:466:22
811.66:456:23
911.76:446:23
1011.76:426:24
1111.76:416:24
1211.76:406:24
1311.86:396:25
1411.86:386:25
1511.86:376:26
1611.86:356:26
1711.96:346:27
1811.96:336:27
1911.96:326:27
2012.06:316:28
2112.06:306:28
2212.06:286:29
2312.06:276:29
2412.16:266:30
2512.16:256:30
2612.16:246:31
2712.16:236:31
2812.26:216:31
2912.26:206:32
3012.26:196:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.69 kWh/m².

For context, solar energy here swings from a low near 2.78 kWh/m² to a high of 6.25 kWh/m² in December across the year — September's 4.69 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.7Bright
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in September

Is September a good time to visit San Pedro?

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

6.9
Sightseeing
2nd-best month of the year
6.0
Beach & pool
4th-best month of the year

September is a reasonable time to visit San Pedro for sightseeing.

What to pack for San Pedro in September

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

In September, San Pedro sees daytime highs around 24°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in San Pedro 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 San Pedro peaks around January 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 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 21UV 14Jun 22UV 4
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May6High
Jun4Moderate
Jul5Moderate
Aug6High
Sep7Very high
Oct9Very high
Nov11Extreme
Dec13Extreme

Air quality in San Pedro 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 San Pedro is worst in September — around 24 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (March, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1023 µg/m³Mar 176 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar6Good
Apr7Good
May6Good
Jun6Good
Jul10Good
Aug22Moderate
Sep24Moderate
Oct12Good
Nov9Good
Dec7Good
Location & terrain

Where is San Pedro?

San Pedro sits at 26.6°S, 54.1°W, 554 m above sea level, in Argentina. The nearest listed city is San Vicente, 2.0 km away.

Topography around San Pedro

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

Within 3 km, the terrain around San Pedro has only modest variations in elevation — a maximum elevation change of 122 m around an average of 557 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 471 m; within 80 km, large variations in elevation — a maximum elevation change of 817 m.

The land around San Pedro is covered by trees (76%) within 3 km, trees (87%) within 16 km, and trees (83%) within 80 km.

3 km
122 m
16 km
471 m
80 km
817 m
treesgrasslandcroplandartificial surfaces
September weather nearby: San Vicente 2.0 km · Eldorado 56 km · São Miguel d'Oeste 60 km · Dionísio Cerqueira 62 km · Montecarlo 65 km · Santo Antônio do Sudoeste 72 km · Itapiranga 72 km · El Soberbio 76 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 San Pedro (-26.6218°, -54.109°, elevation 554 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).