San Lorenzo weather in September

In September, San Lorenzo sees average daytime highs of 19°C and overnight lows near 7°C, with 80 mm of precipitation across 10.9 wet days and about 11.8 hours of daylight. It is the 7th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 19°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 30 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 3rd-clearest and 1st-windiest month. For the whole year in context, see San Lorenzo's year-round climate.

Daytime high
19°
7th warmest
Overnight low
4th coldest
Precipitation
80 mm
10.9 wet days
Daylight
11 h 54 min
7:21 AM – 7:12 PM
Cloud cover
43%
3rd clearest
Wind
5 km/h
1st windiest
Solar energy
5.72 kWh/m²
Travel score
6.2
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 19°C through the month.

A typical September day in San Lorenzo reaches about 19°C in the afternoon and slips back to 7°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 25°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)
1186
2186
3186
4186
5186
6186
7186
8186
9186
10186
11186
12187
13187
14187
15197
16197
17197
18197
19197
20197
21197
22197
23198
24198
25198
26198
27198
28198
29198
30198

San Lorenzo weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan23° / 14°33926.2013.44.2
Feb22° / 14°31524.1012.94.0
Mar20° / 13°34126.1012.23.9
Apr18° / 11°216200.111.44.5
May16° / 131150.310.84.5
Jun15° / 619.60.510.54.8
Jul15° / 447.80.810.65.1
Aug17° / 528.10.511.16.1
Sep19° / 8010.90.211.86.2
Oct20° / 10°17317.70.112.65.3
Nov21° / 12°23519013.25.0
Dec22° / 14°31423.5013.54.5

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 14% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27228
37030
47030
57030
66832
76832
86832
96832
106832
116832
126832
136832
146931
156931
166832
176832
186733
196832
206733
216733
226634
236535
246436
256337
266238
276139
286040
295941
305842

Chance of precipitation in September

Any precipitationSnow

San Lorenzo gets around 80 mm of rain and snow over 10.9 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 37% and peaks near 49% on the wettest days, and about 0 day brings snow. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
1292
2302
3302
4312
5321
6321
7331
8331
9331
10341
11341
12341
13341
14341
15351
16351
17351
18361
19361
20370
21380
22390
23400
24420
25430
26440
27460
28470
29480
30490

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1991
2991
3991
4991
5991
61000
71000
81000
91000
101000
111000
121000
13991
14991
15991
16991
17991
18991
19982
20982
21982
22982
23982
24973
25973
26973
27964
28964
29955
30955

Wind in September

Winds average 5 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 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 42 minutes over September. Sunrise moves from 7:37 AM to 7:05 AM, and sunset from 7:06 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:377:06
211.57:367:07
311.57:357:07
411.67:347:08
511.67:337:08
611.67:327:08
711.67:307:09
811.77:297:09
911.77:287:09
1011.77:277:10
1111.77:267:10
1211.87:257:11
1311.87:247:11
1411.87:237:11
1511.87:227:12
1611.97:217:12
1711.97:197:12
1811.97:187:13
1911.97:177:13
2012.07:167:13
2112.07:157:14
2212.07:147:14
2312.07:137:15
2412.17:127:15
2512.17:117:15
2612.17:097:16
2712.17:087:16
2812.27:077:17
2912.27:067:17
3012.27:057:17

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.72 kWh/m².

For context, solar energy here swings from a low near 3.56 kWh/m² to a high of 6.08 kWh/m² in November across the year — September's 5.72 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Hazard calendar for San Lorenzo

In seasonPeak

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

San Lorenzo'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 San Lorenzo?

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

6.2
Sightseeing
1st-best month of the year
2.4
Beach & pool
6th-best month of the year

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

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 19°C and nights near 7°C. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

UV index in San Lorenzo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Lorenzo peaks around January 16 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 16UV 16Jul 10UV 6
UV index (midday)Level
Jan16Extreme
Feb16Extreme
Mar14Extreme
Apr9Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep10Extreme
Oct13Extreme
Nov15Extreme
Dec16Extreme
Location & terrain

Where is San Lorenzo?

San Lorenzo sits at 24.7°S, 65.5°W, 1,335 m above sea level, in Argentina. The nearest listed city is Salta, 10 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 large variations in elevation — a maximum elevation change of 647 m around an average of 1,401 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,253 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,347 m.

The land around San Lorenzo is covered by trees (48%) and grassland (36%) within 3 km, trees (56%) and grassland (20%) within 16 km, and trees (41%), bare terrain (23%) and grassland (20%) within 80 km.

3 km
647 m
16 km
2,253 m
80 km
5,347 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Salta 10 km · San José de los Cerrillos 18 km · Rosario de Lerma 29 km · General Güemes 45 km · Palpalá 60 km · San Salvador de Jujuy 64 km · San Pedro de Jujuy 84 km · San José de Metán 99 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 (-24.7362°, -65.4873°, elevation 1,335 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).