Bahía Blanca weather in July

Name: Bahía Blanca
Address: AR

In July, Bahía Blanca has daytime highs averaging 13 °C, nights around 5.1 °C, with 4.8 wet days, and a sea temperature of 8.7 °C. Figures are 1991–2020 climate normals.

12.8°C Average high
5.1°C Average low
4.8days Wet days
33mm Rainfall
8.7°C Sea temperature
9.7h Daylight

Daily temperatures through July

Daily highDaily low Day of month on the horizontal axis. Highs peak at 13.7 °C and lows bottom out at 3.8 °C.

How July develops

Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.

Days	Avg high	Avg low	Chance of rain
1–10 July	12.5 °C	5.1 °C	16 %
11–20 July	12.6 °C	4.9 °C	17 %
21–31 July	13.1 °C	5.2 °C	15 %

Chance of a wet day (over 1 mm) by date in July. Wettest date over the 30 years: July 12, at 37 %. Single dates are noisy — read the shape, not the spikes.

What to expect

Measure	Typical July	Share of the month
Days above 25 °C	0 of 31	0 %
Days above 30 °C	0 of 31	0 %
Days below 0 °C	2.0 of 31	6 %
Days with more than 1 mm rain	4.8 of 31	15 %

Conditions in July

Measure	Average
Mean temperature	8.4 °C
Record high (1991–2020)	23 °C
Record low (1991–2020)	-3.4 °C
Relative humidity	69 %
Wind speed	25 km/h
Cloud cover	53 %

Where Bahía Blanca ranks in July

Ranking	Position	Value
The coolest places in South America in July	10thof 50	13 °C
The coolest places in the world in July	19thof 50	13 °C

July compared with the months around it

Month	Avg high	Rainfall	Cloud
May	16.7 °C	39 mm	54 %
June	13.4 °C	26 mm	53 %
July	12.8 °C	33 mm	53 %
August	15.2 °C	34 mm	51 %
September	17.7 °C	45 mm	50 %

See all twelve months for Bahía Blanca

July is the 12th warmest month here.
It is the 2nd driest month of the year.
It ranks 11th for least cloud cover.
Days last about 9.7 hours from sunrise to sunset.
It rains on 4.8 of 31 days — 15 % of the month.
Nights are about 7.7 °C cooler than the middle of the day.
The hottest July day on record since 1991 reached 23 °C, 11 °C above the usual daytime high.
Beach score: 21 / 100 — see how this is calculated.

Nearby destinations in July

Destination	Avg high	Wet days	Sea
Bahía Blanca	13 °C	4.8	8.7
Mar del Plata	12 °C	6	11
Neuquén	12 °C	3	–

QuestionsJuly in Bahía Blanca, answered

How warm is Bahía Blanca in July?

Daily highs average 13 °C and nights fall to about 5.1 °C, a spread of 7.7 °C between afternoon and dawn. That makes July the 12th warmest month of the year here.

Does it rain much in Bahía Blanca in July?

July averages 33 mm of rain, spread over about 5 of the 31 days — 15 % of the month. Cloud cover averages 53 % of the sky.

Is the sea warm enough to swim in July?

The sea averages 8.7 °C off Bahía Blanca in July. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.

How long are the days in July?

Bahía Blanca averages 9.7 hours between sunrise and sunset in July. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.