Ciudad Acuña climate

Name: Ciudad Acuña
Address: MX

Ciudad Acuña is warmest in August, with average highs of 36 °C, and coldest in January, when nights average 7.3 °C. September is the wettest month (63 mm) and January the driest (22 mm). Figures are 1991–2020 climate normals.

Across a full year Ciudad Acuña averages 481 mm of rain, 248 days above 25 °C and 2 days below freezing.

Mexico · population 216,099 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month August 36 °C
Coldest month January 7.3 °C
Driest month January 22 mm
Wettest month September 63 mm
Least cloud October 37 % cloud
Hottest on record June 44 °C
Coldest on record February -8.2 °C

What to expectCiudad Acuña through the year

Ciudad Acuña has a clear annual cycle: average daily highs run from 19 °C in January to 36 °C in August, a swing of 19 °C in mean temperature across the year.

Counted across a normal year, 248 days a year reach 25 °C, 171 of them reach 30 °C, 2 nights drop below freezing. The warmest reading in the 1991–2020 record is 44 °C, in June.

Rain is strongly seasonal. September averages 63 mm against 22 mm in January — 2.9 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	19.0 °C	22 mm	47 %
February	22.2 °C	24 mm	47 %
March	26.0 °C	38 mm	47 %
April	30.1 °C	42 mm	44 %
May	32.8 °C	62 mm	48 %
June	35.5 °C	38 mm	39 %
July	36.0 °C	44 mm	40 %
August	36.3 °C	40 mm	38 %
September	32.6 °C	63 mm	40 %
October	28.6 °C	54 mm	37 %
November	22.7 °C	30 mm	42 %
December	18.9 °C	22 mm	46 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	19.0 °C	7.3 °C	12.1 °C	31.7 °C	-4.3 °C	3	0	1
February	22.2 °C	9.4 °C	14.6 °C	36.9 °C	-8.2 °C	9	1	1
March	26.0 °C	13.2 °C	18.6 °C	36.9 °C	-1.1 °C	20	6	0
April	30.1 °C	17.1 °C	22.8 °C	41.2 °C	4.9 °C	27	15	0
May	32.8 °C	21.3 °C	26.5 °C	41.8 °C	8.8 °C	30	24	0
June	35.5 °C	24.7 °C	29.8 °C	43.8 °C	16.7 °C	30	29	0
July	36.0 °C	25.6 °C	30.5 °C	43.3 °C	21.0 °C	31	30	0
August	36.3 °C	26.1 °C	30.9 °C	41.7 °C	21.5 °C	31	30	0
September	32.6 °C	22.8 °C	27.3 °C	42.4 °C	11.3 °C	30	24	0
October	28.6 °C	18.0 °C	22.7 °C	38.4 °C	2.4 °C	26	12	0
November	22.7 °C	12.2 °C	16.7 °C	32.9 °C	-1.3 °C	10	1	0
December	18.9 °C	8.0 °C	12.5 °C	29.8 °C	-3.5 °C	2	0	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	22 mm	4	10 h/day	47 %	60 %	21 km/h
February	24 mm	4	11 h/day	47 %	57 %	22 km/h
March	38 mm	5	12 h/day	47 %	56 %	24 km/h
April	42 mm	5	13 h/day	44 %	53 %	26 km/h
May	62 mm	8	14 h/day	48 %	59 %	25 km/h
June	38 mm	5	14 h/day	39 %	56 %	24 km/h
July	44 mm	5	14 h/day	40 %	53 %	23 km/h
August	40 mm	4	13 h/day	38 %	51 %	21 km/h
September	63 mm	7	12 h/day	40 %	60 %	19 km/h
October	54 mm	6	11 h/day	37 %	60 %	21 km/h
November	30 mm	4	11 h/day	42 %	62 %	21 km/h
December	22 mm	4	10 h/day	46 %	62 %	21 km/h

How Ciudad Acuña compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Ciudad Acuña	36 °C	7.3 °C	481 mm	248
Piedras Negras · Mexico	37 °C	8.0 °C	563 mm	259
San Antonio · United States	35 °C	7.2 °C	861 mm	227
Nuevo Laredo · Mexico	37 °C	10 °C	497 mm	281
Monclova · Mexico	35 °C	8.4 °C	399 mm	268
Austin · United States	35 °C	6.3 °C	924 mm	216
Corpus Christi · United States	32 °C	12 °C	781 mm	215

Where Ciudad Acuña ranks

Ranking	Position	Value
The warmest places in North America in August	14thof 50	36 °C
The warmest places in North America in July	15thof 50	36 °C
The warmest places in North America in June	15thof 50	36 °C
The warmest places in North America in September	20thof 50	33 °C
Places with the best weather in North America in November	22ndof 50	95/100
The warmest places in North America in May	22ndof 50	33 °C

Planning a trip? See the best time to visit Ciudad Acuña.

QuestionsCommon questions about Ciudad Acuña’s climate

When is the best time to visit Ciudad Acuña?

That depends on what you want, so the honest answer is a comparison rather than a single month. March, April, October sit closest to 20 °C on average, August is the warmest month and January the driest. The month-by-month table above has the full picture.

How hot does Ciudad Acuña get?

In August, the warmest month, daily highs average 36 °C. About 171 days a year pass 30 °C. The highest value in the 1991–2020 record is 44 °C.

How cold does it get in winter?

Nights average 7.3 °C in January, the coldest month. A normal year has 2 nights below freezing.

Which month is wettest in Ciudad Acuña?

September, averaging 63 mm over 7 days with rain. The driest month is January with 22 mm. The year as a whole averages 481 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Ciudad Acuña rather than what any particular week will bring. Individual years can differ substantially from the normal.

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: monthly rankings, daylight hours, beach and comfort scores. 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.