Bahía Blanca weather in October

In October, Bahía Blanca sees average daytime highs of 19°C and overnight lows near 11°C, with 64 mm of rain across 7.8 wet days and about 13 hours of daylight. It is the 7th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 21°C by the end. The sky is clear or mostly clear about 45% of the time in October, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of October to 13 h 36 min by month's end. Set against the rest of the year, October is Bahía Blanca's 7th-clearest and 7th-windiest month. For the whole year in context, see Bahía Blanca's year-round climate.

Daytime high
19°
7th warmest
Overnight low
11°
6th coldest
Rainfall
64 mm
7.8 wet days
Daylight
13 hours
6:23 AM – 7:25 PM
Cloud cover
50%
7th clearest
Wind
18 km/h
7th windiest
Solar energy
5.75 kWh/m²
Travel score
6.7
out of 10

Bahía Blanca is city in Argentina.

Density
2,301/km²
people per km²
Founded
1828

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 18°C in the first days to 21°C by the end.

A typical October day in Bahía Blanca reaches about 19°C in the afternoon and slips back to 11°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 24°C. Set against its neighbours, October runs about 3°C warmer than September and about 4°C cooler than November.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
1189
21810
31810
41810
51810
61810
71810
81910
91910
101910
111911
121911
131911
141911
151911
162011
172011
182011
192011
202011
212011
222012
232012
242012
252012
262112
272112
282112
292112
302112
312112

Bahía Blanca weather by month

How October compares with the rest of the year at a glance. October is the 7th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 18°547.114.47.3
Feb27° / 18°656.713.57.4
Mar24° / 16°676.712.37.7
Apr20° / 12°556117.1
May16° / 385.49.95.6
Jun13° / 284.49.34.1
Jul12° / 3459.63.7
Aug14° / 354.810.54.7
Sep16° / 456.211.75.7
Oct19° / 11°647.8136.7
Nov23° / 14°63714.17.6
Dec26° / 17°576.214.77.6

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 14% of October, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25446
35446
45446
55446
65446
75545
85644
95644
105644
115743
125743
135743
145842
155842
165842
175842
185941
195941
206040
216040
226139
236139
246238
256238
266436
276436
286436
296535
306535
316535

Chance of precipitation in October

Any precipitation

Bahía Blanca gets around 64 mm of rain over 7.8 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
126
226
327
427
527
627
727
827
927
1027
1126
1226
1326
1426
1525
1625
1725
1825
1924
2024
2124
2224
2324
2424
2523
2623
2723
2823
2924
3024
3124

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, October lands in the dry band about 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19820
29820
39730
49730
59730
69640
79640
89550
99550
109361
119361
129361
139271
149271
159271
169181
179181
189181
199181
209091
219091
229091
239091
249091
259091
2688102
2788102
2888102
2987112
3087112
3187112

Wind in October

Winds average 18 km/h in October.

Across October, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze
3119light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 24 min at the start of October to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over October. Sunrise moves from 6:46 AM to 6:04 AM, and sunset from 7:10 PM to 7:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:467:10
212.46:457:11
312.56:437:12
412.56:417:13
512.66:407:14
612.66:387:15
712.76:377:16
812.76:357:17
912.76:347:18
1012.86:327:19
1112.86:317:20
1212.96:297:21
1312.96:287:22
1412.96:267:23
1513.06:257:24
1613.06:237:25
1713.16:227:26
1813.16:207:27
1913.26:197:28
2013.26:187:29
2113.26:167:30
2213.36:157:31
2313.36:147:32
2413.36:127:33
2513.46:117:34
2613.46:107:36
2713.56:097:37
2813.56:087:38
2913.56:067:39
3013.66:057:40
3113.66:047:41

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.75 kWh/m².

For context, solar energy here swings from a low near 1.98 kWh/m² to a high of 7.89 kWh/m² in December across the year — October's 5.75 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.1Bright
45.1Bright
55.2Bright
65.2Bright
75.3Bright
85.3Bright
95.4Bright
105.4Bright
115.5Bright
125.5Bright
135.6Bright
145.7Bright
155.7Bright
165.8Bright
175.8Bright
185.9Bright
195.9Bright
206.0Intense
216.0Intense
226.1Intense
236.2Intense
246.2Intense
256.3Intense
266.3Intense
276.3Intense
286.4Intense
296.4Intense
306.5Intense
316.5Intense
Planning a trip in October

Is October a good time to visit Bahía Blanca?

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

6.7
Sightseeing
7th-best month of the year
3.2
Beach & pool
7th-best month of the year

October is a reasonable time to visit Bahía Blanca for sightseeing.

What to pack for Bahía Blanca in October

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

In October, Bahía Blanca sees daytime highs around 19°C and nights near 11°C. Worth packing: sun protection. About 8 days see rain.

sun protection

Sea temperature near Bahía Blanca in October

The nearest coast averages about 15°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 km away) is warmest in January at about 22°C and coldest in August near 9°C.

It's comfortable for a long swim from Dec 8 to Mar 20 — about 3.4 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb22Refreshing
Mar21Refreshing
Apr17Cool
May14Bracing
Jun11Bracing
Jul9Bracing
Aug9Bracing
Sep11Bracing
Oct15Bracing
Nov18Cool
Dec21Refreshing

UV index in Bahía Blanca in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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 Bahía Blanca peaks around December 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateModerateVery highExtremeDec 20UV 12Jun 21UV 2
UV index (midday)Level
Jan12Extreme
Feb11Extreme
Mar8Very high
Apr6High
May3Moderate
Jun2Low
Jul2Moderate
Aug3Moderate
Sep5Moderate
Oct7Very high
Nov10Extreme
Dec13Extreme
Location & terrain

Where is Bahía Blanca?

Bahía Blanca sits at 38.7°S, 62.3°W, 20 m above sea level, in Argentina. The nearest listed city is Punta Alta, 25 km away.

Carmen de PatagonesViedma

Topography around Bahía Blanca

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

Within 3 km, the terrain around Bahía Blanca has only modest variations in elevation — a maximum elevation change of 67 m around an average of 26 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 110 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,244 m.

The land around Bahía Blanca is covered by artificial surfaces (80%) within 3 km, grassland (33%) and cropland (23%) within 16 km, and cropland (39%) and grassland (37%) within 80 km.

3 km
67 m
16 km
110 m
80 km
1,244 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
October weather nearby: Punta Alta 25 km · Coronel Pringles 114 km · Pigüé 125 km · Coronel Suárez 143 km · Río Colorado 161 km · Tres Arroyos 177 km · Carmen de Patagones 240 km · Viedma 242 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 Bahía Blanca (-38.7176°, -62.2655°, elevation 20 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).