San Lorenzo weather in September

In September, San Lorenzo sees average daytime highs of 25°C and overnight lows near 13°C, with 109 mm of rain across 8.4 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 50% 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 Lorenzo's 2nd-clearest and 1st-windiest month. For the whole year in context, see San Lorenzo's year-round climate.

Daytime high
25°
8th warmest
Overnight low
13°
4th coldest
Rainfall
109 mm
8.4 wet days
Daylight
11 h 48 min
6:54 AM – 6:44 PM
Cloud cover
45%
2nd clearest
Wind
15 km/h
1st windiest
Solar energy
4.75 kWh/m²
Travel score
7.4
out of 10

San Lorenzo 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

Day-to-day highs hold fairly steady near 25°C through the month.

A typical September day in San Lorenzo reaches about 25°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 18°C and 32°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)
12413
22413
32413
42413
52413
62413
72413
82413
92413
102413
112413
122413
132413
142413
152413
162413
172513
182513
192513
202514
212514
222514
232514
242514
252514
262514
272514
282514
292515
302515

How September really feels in San Lorenzo

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.

San Lorenzo weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 22°1481113.64.1
Feb31° / 21°13610.1134.5
Mar29° / 20°14310.212.25.4
Apr26° / 17°1689.811.36.8
May23° / 14°1127.810.67.2
Jun20° / 12°807.810.26.7
Jul20° / 10°717.210.47.0
Aug23° / 11°756.7117.6
Sep25° / 13°1098.411.87.4
Oct27° / 16°1911112.76.5
Nov29° / 18°160913.45.9
Dec31° / 20°1601013.84.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% 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 39%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16733
26634
36535
46535
56535
66436
76337
86337
96337
106238
116238
126238
136238
146238
156139
166139
176139
186040
196040
206040
216040
226040
235941
245941
255842
265743
275644
285644
295545
305545

Chance of precipitation in September

Any precipitation

San Lorenzo gets around 109 mm of rain over 8.4 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 28% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
125
225
325
426
526
626
726
826
927
1027
1127
1227
1327
1427
1527
1627
1727
1827
1927
2027
2128
2228
2329
2429
2529
2630
2730
2831
2931
3031

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 52% of days. Sticky, muggy-or-worse air turns up on roughly 9% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
156191960
254192070
354192070
454192070
555191970
654201970
754201970
855201870
954211870
1055211770
1155211770
1255211770
1355211770
1455221670
1554221671
1654221671
1754221671
1853221681
1953221681
2052231681
2151231691
2251231691
23502317101
24492217101
25482218111
26472219111
27462219122
28452220122
29442220132
30432120132

Wind in September

Winds average 15 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light 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 7:12 AM to 6:37 AM, and sunset from 6:37 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:126:37
211.47:116:38
311.57:106:38
411.57:096:39
511.57:086:39
611.67:076:40
711.67:056:40
811.67:046:41
911.67:036:41
1011.77:026:42
1111.77:006:42
1211.76:596:42
1311.76:586:43
1411.86:576:43
1511.86:566:44
1611.86:546:44
1711.96:536:45
1811.96:526:45
1911.96:516:46
2011.96:496:46
2112.06:486:47
2212.06:476:47
2312.06:466:48
2412.16:456:48
2512.16:436:49
2612.16:426:49
2712.26:416:50
2812.26:406:50
2912.26:386:51
3012.26:376:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.75 kWh/m².

For context, solar energy here swings from a low near 2.59 kWh/m² to a high of 6.93 kWh/m² in December across the year — September's 4.75 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
94.5Bright
104.6Bright
114.6Bright
124.7Bright
134.7Bright
144.7Bright
154.8Bright
164.8Bright
174.8Bright
184.9Bright
194.9Bright
204.9Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in September

Is September a good time to visit San Lorenzo?

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

7.4
Sightseeing
2nd-best month of the year
6.5
Beach & pool
7th-best month of the year

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

What to pack for San Lorenzo in September

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

In September, San Lorenzo sees daytime highs around 25°C and nights near 13°C. Worth packing: light clothes, rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in San Lorenzo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — 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 Lorenzo 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 highModerateExtremeJan 24UV 14Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May5High
Jun4Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct6High
Nov11Extreme
Dec13Extreme

Air quality in San Lorenzo 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 Lorenzo is worst in August — around 16 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (May, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodAug 2115 µg/m³May 146 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar7Good
Apr7Good
May6Good
Jun7Good
Jul9Good
Aug16Moderate
Sep14Moderate
Oct9Good
Nov7Good
Dec6Good
Location & terrain

Where is San Lorenzo?

San Lorenzo sits at 28.1°S, 58.8°W, 63 m above sea level, in Argentina. The nearest listed city is Saladas, 19 km away.

Topography around San Lorenzo

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

Within 3 km, the terrain around San Lorenzo has only modest variations in elevation — a maximum elevation change of 23 m around an average of 61 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 43 m; within 80 km, only modest variations in elevation — a maximum elevation change of 75 m.

The land around San Lorenzo is covered by grassland (59%) and trees (33%) within 3 km, grassland (57%) and trees (23%) within 16 km, and grassland (44%), trees (24%) and wetland (24%) within 80 km.

3 km
23 m
16 km
43 m
80 km
75 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Saladas 19 km · Villa Ocampo 70 km · San Luis del Palmar 73 km · Corrientes 74 km · Barranqueras 75 km · Resistencia 78 km · Fontana 84 km · Goya 122 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 Lorenzo (-28.1344°, -58.7668°, elevation 63 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).