Bahía Blanca weather in May

In May, Bahía Blanca sees average daytime highs of 16°C and overnight lows near 9°C, with 38 mm of rain across 5.4 wet days and about 9.9 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 14°C by the end. The sky is clear or mostly clear about 36% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 24 min at the start of May to 9 h 30 min by month's end. Set against the rest of the year, May is Bahía Blanca's 12th-clearest and 12th-windiest month. For the whole year in context, see Bahía Blanca's year-round climate.

Daytime high
16°
9th warmest
Overnight low
5th coldest
Rainfall
38 mm
5.4 wet days
Daylight
9 h 54 min
8:08 AM – 6:02 PM
Cloud cover
56%
12th clearest
Wind
17 km/h
12th windiest
Solar energy
2.4 kWh/m²
Travel score
5.6
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 18°C in the first days to 14°C by the end.

A typical May day in Bahía Blanca reaches about 16°C in the afternoon and slips back to 9°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 20°C. Set against its neighbours, May runs about 4°C cooler than April and about 3°C warmer than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11811
21811
31810
41810
51810
61810
71710
81710
91710
101710
111710
121710
13179
14169
15169
16169
17169
18169
19169
20159
21158
22158
23158
24158
25158
26158
27158
28148
29147
30147
31147

Bahía Blanca weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 9th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35644
45644
55545
65545
75446
85446
95446
105347
115149
125050
134951
144852
154852
164753
174753
184654
194555
204555
214456
224555
234555
244654
254654
264654
274753
284852
294951
304951
315050

Chance of precipitation in May

Any precipitation

Bahía Blanca gets around 38 mm of rain over 5.4 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 17% and peaks near 18% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
117
217
317
417
517
617
717
817
917
1017
1117
1217
1317
1417
1518
1618
1717
1817
1917
2017
2117
2217
2317
2417
2517
2616
2716
2816
2915
3015
3115

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19091
29091
39091
49091
59091
69181
79181
89181
99181
109271
119271
129271
139271
149361
159361
169361
179361
189361
199361
209451
219451
229451
239451
249541
259640
269640
279730
289730
299730
309820
319820

Wind in May

Winds average 17 km/h in May, the calmest month.

Across May, daily wind ranges from about 17 km/h on the calmest days to 18 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
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 24 min at the start of May to 9 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over May. Sunrise moves from 7:54 AM to 8:21 AM, and sunset from 6:18 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.47:546:18
210.47:556:17
310.37:566:16
410.37:576:15
510.37:586:14
610.27:596:12
710.28:006:11
810.28:016:10
910.18:026:09
1010.18:036:08
1110.18:046:07
1210.08:056:06
1310.08:066:05
1410.08:076:04
159.98:076:03
169.98:086:02
179.98:096:01
189.88:106:01
199.88:116:00
209.88:125:59
219.88:135:58
229.78:145:57
239.78:155:57
249.78:155:56
259.78:165:55
269.68:175:55
279.68:185:54
289.68:195:54
299.68:195:53
309.58:205:52
319.58:215:52

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.4 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 — May's 2.4 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.9Moderate
22.9Moderate
32.8Moderate
42.8Moderate
52.8Moderate
62.7Moderate
72.7Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.4Moderate
152.4Moderate
162.4Moderate
172.4Moderate
182.3Moderate
192.3Moderate
202.3Moderate
212.3Moderate
222.2Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.1Moderate
282.1Moderate
292.1Moderate
302.1Moderate
312.1Moderate
Planning a trip in May

Is May a good time to visit Bahía Blanca?

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

5.6
Sightseeing
9th-best month of the year
0.9
Beach & pool
9th-best month of the year

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

What to pack for Bahía Blanca in May

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

In May, Bahía Blanca sees daytime highs around 16°C and nights near 9°C. Worth packing: a warm layer. About 5 days see rain.

a warm layer

Sea temperature near Bahía Blanca in May

The nearest coast averages about 14°C in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 3 — 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
May 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).