Monterrey climate

Name: Monterrey
Address: MX

Monterrey is warmest in August, with average highs of 33 °C, and coldest in January, when nights average 9.8 °C. September is the wettest month (123 mm) and December the driest (32 mm). Figures are 1991–2020 climate normals.

Across a full year Monterrey averages 582 mm of rain, 244 days above 25 °C and 1 days below freezing.

Mexico · population 1,135,512 · 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 33 °C
Coldest month January 9.8 °C
Driest month December 32 mm
Wettest month September 123 mm
Least cloud June 39 % cloud
Hottest on record May 41 °C
Coldest on record February -5.7 °C

What to expectMonterrey through the year

Monterrey has a clear annual cycle: average daily highs run from 20 °C in January to 33 °C in August, a swing of 13 °C in mean temperature across the year.

Counted across a normal year, 244 days a year reach 25 °C, 132 of them reach 30 °C, 1 nights drop below freezing. The warmest reading in the 1991–2020 record is 41 °C, in May.

Rain is strongly seasonal. September averages 123 mm against 32 mm in December — 3.9 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	20.1 °C	37 mm	49 %
February	23.0 °C	32 mm	46 %
March	26.0 °C	46 mm	44 %
April	29.0 °C	46 mm	46 %
May	30.8 °C	52 mm	45 %
June	32.3 °C	38 mm	39 %
July	32.7 °C	45 mm	43 %
August	32.9 °C	32 mm	39 %
September	29.1 °C	123 mm	51 %
October	26.7 °C	60 mm	43 %
November	23.0 °C	38 mm	43 %
December	20.4 °C	32 mm	47 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	20.1 °C	9.8 °C	14.2 °C	32.4 °C	-4.7 °C	6	0
February	23.0 °C	11.6 °C	16.4 °C	36.7 °C	-5.7 °C	10	2
March	26.0 °C	14.1 °C	19.3 °C	37.5 °C	1.3 °C	19	6
April	29.0 °C	17.2 °C	22.5 °C	40.1 °C	4.3 °C	25	13
May	30.8 °C	20.1 °C	25.0 °C	40.6 °C	10.5 °C	29	18
June	32.3 °C	21.9 °C	26.8 °C	40.6 °C	15.9 °C	30	23
July	32.7 °C	22.3 °C	27.2 °C	39.7 °C	18.9 °C	31	25
August	32.9 °C	22.7 °C	27.5 °C	38.8 °C	18.3 °C	31	26
September	29.1 °C	20.8 °C	24.6 °C	37.7 °C	13.1 °C	27	12
October	26.7 °C	17.7 °C	21.7 °C	35.6 °C	4.4 °C	22	5
November	23.0 °C	13.7 °C	17.7 °C	33.4 °C	1.8 °C	10	1
December	20.4 °C	10.7 °C	14.8 °C	31.9 °C	-2.3 °C	5	1

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	37 mm	6	11 h/day	49 %	66 %	12 km/h
February	32 mm	6	11 h/day	46 %	64 %	13 km/h
March	46 mm	7	12 h/day	44 %	62 %	14 km/h
April	46 mm	7	13 h/day	46 %	62 %	15 km/h
May	52 mm	8	13 h/day	45 %	67 %	14 km/h
June	38 mm	6	14 h/day	39 %	65 %	15 km/h
July	45 mm	5	14 h/day	43 %	62 %	16 km/h
August	32 mm	5	13 h/day	39 %	60 %	15 km/h
September	123 mm	11	12 h/day	51 %	72 %	12 km/h
October	60 mm	7	12 h/day	43 %	71 %	12 km/h
November	38 mm	6	11 h/day	43 %	69 %	12 km/h
December	32 mm	5	11 h/day	47 %	67 %	11 km/h

How Monterrey 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
Monterrey	33 °C	9.8 °C	582 mm	244
Santa Catarina · Mexico	32 °C	9.4 °C	569 mm	230
Ciudad Apodaca · Mexico	34 °C	9.5 °C	575 mm	256
Ciudad Benito Juárez · Mexico	33 °C	9.7 °C	553 mm	252
Saltillo · Mexico	28 °C	6.1 °C	545 mm	167
Monclova · Mexico	35 °C	8.4 °C	399 mm	268
Reynosa · Mexico	36 °C	12 °C	561 mm	296

Where Monterrey ranks

Ranking	Position	Value
Places with the best weather in North America in February	3rdof 50	96/100
Places with the best weather in the world in February	16thof 50	96/100
Places with the best weather in North America in March	22ndof 50	91/100

Planning a trip? See the best time to visit Monterrey.

QuestionsCommon questions about Monterrey’s climate

When is the best time to visit Monterrey?

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

How hot does Monterrey get?

In August, the warmest month, daily highs average 33 °C. About 132 days a year pass 30 °C. The highest value in the 1991–2020 record is 41 °C.

How cold does it get in winter?

Nights average 9.8 °C in January, the coldest month. A normal year has 1 nights below freezing.

Which month is wettest in Monterrey?

September, averaging 123 mm over 11 days with rain. The driest month is December with 32 mm. The year as a whole averages 582 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 Monterrey 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.