Nicolás Romero climate

Name: Nicolás Romero
Address: MX

Nicolás Romero is warmest in April, with average highs of 25 °C, and coldest in January, when nights average 5.2 °C. September is the wettest month (136 mm) and December the driest (10 mm). Figures are 1991–2020 climate normals.

Across a full year Nicolás Romero averages 750 mm of rain, 46 days above 25 °C and 1 days below freezing.

Mexico · population 281,799 · 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 April 25 °C
Coldest month January 5.2 °C
Driest month December 10 mm
Wettest month September 136 mm
Least cloud March 34 % cloud
Hottest on record May 32 °C
Coldest on record January -2.3 °C

What to expectNicolás Romero through the year

Nicolás Romero has a clear annual cycle: average daily highs run from 20 °C in January to 25 °C in April, a swing of 5.5 °C in mean temperature across the year.

Counted across a normal year, 46 days a year reach 25 °C, 1 of them reach 30 °C, 1 nights drop below freezing. The warmest reading in the 1991–2020 record is 32 °C, in May.

Rain is strongly seasonal. September averages 136 mm against 10 mm in December — 13 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	19.5 °C	17 mm	41 %
February	21.6 °C	16 mm	35 %
March	23.7 °C	20 mm	34 %
April	24.8 °C	38 mm	41 %
May	24.3 °C	56 mm	48 %
June	22.5 °C	120 mm	68 %
July	20.8 °C	121 mm	74 %
August	21.0 °C	118 mm	75 %
September	20.0 °C	136 mm	79 %
October	19.7 °C	74 mm	67 %
November	19.5 °C	23 mm	49 %
December	19.6 °C	10 mm	41 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	19.5 °C	5.2 °C	11.7 °C	24.5 °C	-2.3 °C	0	0
February	21.6 °C	6.1 °C	13.3 °C	28.5 °C	-1.6 °C	2	0
March	23.7 °C	7.4 °C	15.1 °C	30.0 °C	0.0 °C	10	0
April	24.8 °C	9.2 °C	16.8 °C	31.1 °C	2.1 °C	15	0
May	24.3 °C	10.4 °C	17.2 °C	32.3 °C	4.5 °C	13	1
June	22.5 °C	11.6 °C	16.5 °C	30.4 °C	6.5 °C	6	0
July	20.8 °C	11.2 °C	15.3 °C	26.2 °C	6.6 °C	0	0
August	21.0 °C	11.5 °C	15.5 °C	25.2 °C	7.4 °C	0	0
September	20.0 °C	11.3 °C	14.9 °C	25.0 °C	2.9 °C	0	0
October	19.7 °C	9.5 °C	13.9 °C	24.9 °C	-0.2 °C	0	0
November	19.5 °C	7.4 °C	12.8 °C	24.7 °C	-1.9 °C	0	0
December	19.6 °C	5.9 °C	12.2 °C	25.4 °C	-2.1 °C	0	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	17 mm	4	11 h/day	41 %	62 %	14 km/h
February	16 mm	3	11 h/day	35 %	57 %	16 km/h
March	20 mm	5	12 h/day	34 %	52 %	17 km/h
April	38 mm	7	13 h/day	41 %	52 %	17 km/h
May	56 mm	11	13 h/day	48 %	60 %	17 km/h
June	120 mm	16	13 h/day	68 %	71 %	17 km/h
July	121 mm	20	13 h/day	74 %	78 %	16 km/h
August	118 mm	18	13 h/day	75 %	78 %	16 km/h
September	136 mm	19	12 h/day	79 %	81 %	15 km/h
October	74 mm	12	12 h/day	67 %	77 %	15 km/h
November	23 mm	5	11 h/day	49 %	71 %	14 km/h
December	10 mm	2	11 h/day	41 %	64 %	13 km/h

How Nicolás Romero 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
Nicolás Romero	25 °C	5.2 °C	750 mm	46
Cuautitlán Izcalli · Mexico	25 °C	5.4 °C	713 mm	52
Cuautitlán · Mexico	25 °C	5.7 °C	713 mm	59
Coacalco · Mexico	25 °C	5.7 °C	538 mm	58
Ecatepec de Morelos · Mexico	25 °C	5.4 °C	745 mm	53
Gustavo Adolfo Madero · Mexico	25 °C	5.9 °C	786 mm	55
Mexico City · Mexico	25 °C	6.9 °C	1,006 mm	60

Where Nicolás Romero ranks

Ranking	Position	Value
The coolest places in North America in August	9thof 50	21 °C
The coolest places in North America in July	11thof 50	21 °C
The coolest places in North America in September	21stof 50	20 °C
The coolest places in North America in June	37thof 50	23 °C

Planning a trip? See the best time to visit Nicolás Romero.

QuestionsCommon questions about Nicolás Romero’s climate

When is the best time to visit Nicolás Romero?

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

How hot does Nicolás Romero get?

In April, the warmest month, daily highs average 25 °C. About 1 days a year pass 30 °C. The highest value in the 1991–2020 record is 32 °C.

How cold does it get in winter?

Nights average 5.2 °C in January, the coldest month. A normal year has 1 nights below freezing.

Which month is wettest in Nicolás Romero?

September, averaging 136 mm over 19 days with rain. The driest month is December with 10 mm. The year as a whole averages 750 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 Nicolás Romero 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.