La Paz weather in September

In September, La Paz sees average daytime highs of 23°C and overnight lows near 12°C, with 76 mm of rain across 6.5 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 23°C by the end. 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 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 La Paz's 5th-clearest and 1st-windiest month. For the whole year in context, see La Paz's year-round climate.

Daytime high
23°
8th warmest
Overnight low
12°
4th coldest
Rainfall
76 mm
6.5 wet days
Daylight
11 h 48 min
6:58 AM – 6:47 PM
Cloud cover
46%
5th clearest
Wind
14 km/h
1st windiest
Solar energy
4.73 kWh/m²
Travel score
7.5
out of 10

La Paz is city in Entre Ríos, Argentina.

Density
208/km²
people per km²
Founded
1835

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 22°C in the first days to 23°C by the end.

A typical September day in La Paz reaches about 23°C in the afternoon and slips back to 12°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 29°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)
12211
22211
32211
42211
52211
62211
72211
82211
92211
102211
112211
122211
132212
142212
152212
162312
172312
182312
192312
202312
212312
222312
232312
242312
252312
262313
272313
282313
292413
302413

How September really feels in La Paz

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.

La Paz 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
Jan31° / 21°1138.913.84.8
Feb30° / 20°1158.413.15.3
Mar28° / 18°1178.612.26.4
Apr25° / 15°1448.611.37.3
May21° / 12°826.310.57.0
Jun18° / 635.4106.6
Jul18° / 475.210.26.7
Aug20° / 10°675.810.97.3
Sep23° / 12°766.511.87.5
Oct25° / 15°1359.412.87.1
Nov28° / 17°1177.613.66.8
Dec30° / 19°1358.2145.4

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 10% of September, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16139
26040
36040
46040
55941
65941
75941
85941
95941
106040
116139
126139
136238
146238
156238
166238
176238
186238
196238
206238
216238
226139
236139
246040
255941
265842
275842
285743
295743
305743

Chance of precipitation in September

Any precipitation

La Paz gets around 76 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 27% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
121
221
321
421
521
621
721
821
921
1021
1121
1221
1321
1421
1521
1620
1720
1821
1921
2021
2121
2222
2322
2423
2524
2624
2725
2826
2926
3027

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 66% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
167171420
267171420
367171420
467181320
567181320
667181230
767181230
868181130
967191130
1068191030
116919930
126819940
136919840
146919840
156919840
167019740
177019740
187019740
197019740
206919840
216820840
226620941
236421951
2462221051
2561221151
2660231151
2759231251
2857241351
2957241351
3055241461

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 6:40 AM, and sunset from 6:39 PM to 6:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:186:39
211.47:176:39
311.47:156:40
411.47:146:40
511.57:136:41
611.57:126:42
711.57:106:42
811.67:096:43
911.67:086:43
1011.67:066:44
1111.77:056:44
1211.77:046:45
1311.77:026:46
1411.87:016:46
1511.87:006:47
1611.86:586:47
1711.86:576:48
1811.96:566:49
1911.96:546:49
2011.96:536:50
2112.06:526:50
2212.06:506:51
2312.06:496:52
2412.16:486:52
2512.16:466:53
2612.16:456:53
2712.26:446:54
2812.26:436:55
2912.26:416:55
3012.36:406:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.73 kWh/m².

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 7.11 kWh/m² in December across the year — September's 4.73 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.3Bright
54.3Bright
64.3Bright
74.4Bright
84.4Bright
94.5Bright
104.5Bright
114.6Bright
124.6Bright
134.7Bright
144.7Bright
154.8Bright
164.8Bright
174.8Bright
184.9Bright
194.9Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in September

Is September a good time to visit La Paz?

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

7.5
Sightseeing
1st-best month of the year
5.5
Beach & pool
8th-best month of the year

September is one of the better times to visit La Paz for general sightseeing.

What to pack for La Paz in September

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

In September, La Paz sees daytime highs around 23°C and nights near 12°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

UV index in La Paz 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 La Paz peaks around January 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 19UV 13Jun 20UV 3
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar10Extreme
Apr7High
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep7High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in La Paz 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 La Paz is worst in August — around 22 µg/m³ PM2.5 (moderate), about 3.8× the cleanest month (May, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1721 µg/m³May 116 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb8Good
Mar6Good
Apr6Good
May6Good
Jun7Good
Jul13Moderate
Aug22Moderate
Sep15Moderate
Oct9Good
Nov6Good
Dec7Good
Location & terrain

Where is La Paz?

La Paz sits at 30.7°S, 59.6°W, 52 m above sea level, in Argentina. The nearest listed city is Santa Elena, 26 km away.

Topography around La Paz

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

Within 3 km, the terrain around La Paz has only modest variations in elevation — a maximum elevation change of 57 m around an average of 32 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 66 m; within 80 km, only modest variations in elevation — a maximum elevation change of 78 m.

The land around La Paz is covered by trees (31%), water (28%) and grassland (20%) within 3 km, trees (29%) and wetland (26%) within 16 km, and grassland (30%), trees (23%) and wetland (23%) within 80 km.

3 km
57 m
16 km
66 m
80 km
78 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Santa Elena 26 km · San Javier 33 km · Esquina 82 km · Federal 86 km · San Justo 91 km · Villaguay 138 km · Paraná 139 km · Santa Fe 143 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 La Paz (-30.7418°, -59.6452°, elevation 52 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).