Nicolás Romero weather in May

In May, Nicolás Romero sees average daytime highs of 26°C and overnight lows near 12°C, with 54 mm of rain across 10.1 wet days and about 12.9 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. 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 12 h 42 min at the start of May to 13 h 06 min by month's end. Set against the rest of the year, May is Nicolás Romero's 7th-clearest and 3rd-windiest month. For the whole year in context, see Nicolás Romero's year-round climate.

Daytime high
26°
2nd warmest
Overnight low
12°
8th coldest
Rainfall
54 mm
10.1 wet days
Daylight
12 h 54 min
6:06 AM – 7:01 PM
Cloud cover
50%
7th clearest
Wind
7 km/h
3rd windiest
Solar energy
6.94 kWh/m²
Travel score
6.8
out of 10

Nicolás Romero is municipal seat of Romero, State of México, Mexico.

Founded
1820

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical May day in Nicolás Romero reaches about 26°C in the afternoon and slips back to 12°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°C. Set against its neighbours, May runs on par with April and about 2°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12612
22612
32612
42612
52612
62612
72612
82612
92612
102612
112612
122612
132612
142612
152612
162612
172612
182612
192612
202612
212612
222612
232613
242613
252613
262613
272613
282613
292613
302613
312613

Nicolás Romero weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 173.510.97.8
Feb23° / 163.311.38.3
Mar25° / 21511.98.1
Apr26° / 11°387.112.47.2
May26° / 12°5410.112.96.8
Jun25° / 13°11415.213.25.9
Jul23° / 13°10417.313.15.6
Aug23° / 13°10717.112.75.6
Sep22° / 13°12517.612.15.4
Oct22° / 11°6611.211.56.4
Nov22° / 224.711.17.7
Dec21° / 102.310.88.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 30% of May, with mostly cloudy or overcast conditions the remaining 34%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16832
26832
36733
46733
56733
66634
76634
86634
96535
106535
116535
126535
136535
146634
156634
166733
176733
186733
196832
206733
216832
226733
236832
246733
256634
266535
276535
286436
296337
306139
316040

Chance of precipitation in May

Any precipitation

Nicolás Romero gets around 54 mm of rain over 10.1 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 33% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
130
231
332
432
533
634
735
835
936
1036
1136
1236
1336
1435
1535
1634
1733
1833
1932
2031
2131
2230
2330
2430
2530
2630
2730
2830
2931
3032
3132

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
5991
6991
7991
8991
9991
10991
11991
12982
13982
14982
15982
16982
17982
18982
19982
20973
21973
22973
23964
24964
25964
26955
27955
28946
29937
30928
31928

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 42 min at the start of May to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 6:13 AM to 6:02 AM, and sunset from 6:56 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:136:56
212.76:136:56
312.76:126:56
412.86:116:57
512.86:116:57
612.86:106:57
712.86:106:58
812.86:096:58
912.86:096:59
1012.86:086:59
1112.96:086:59
1212.96:077:00
1312.96:077:00
1412.96:067:00
1512.96:067:01
1612.96:067:01
1712.96:057:02
1813.06:057:02
1913.06:057:02
2013.06:047:03
2113.06:047:03
2213.06:047:04
2313.06:037:04
2413.06:037:04
2513.06:037:05
2613.06:037:05
2713.16:037:06
2813.16:027:06
2913.16:027:06
3013.16:027:07
3113.16:027:07

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.94 kWh/m².

For context, solar energy here swings from a low near 4.9 kWh/m² to a high of 7.1 kWh/m² in April across the year — May's 6.94 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.0Intense
27.0Intense
37.0Intense
47.0Intense
57.0Intense
67.0Intense
77.0Intense
87.0Intense
97.0Intense
106.9Intense
116.9Intense
126.9Intense
136.9Intense
146.9Intense
156.9Intense
166.9Intense
176.9Intense
186.9Intense
196.9Intense
206.9Intense
216.9Intense
226.9Intense
236.9Intense
246.9Intense
256.9Intense
266.9Intense
276.9Intense
286.8Intense
296.8Intense
306.8Intense
316.8Intense
Planning a trip in May

Hazard calendar for Nicolás Romero

In seasonPeak

None of Nicolás Romero's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Nicolás Romero's rainy season runs June–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Nicolás Romero?

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

6.8
Sightseeing
7th-best month of the year
6.6
Beach & pool
3rd-best month of the year

May is a reasonable time to visit Nicolás Romero for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Nicolás Romero in May

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

In May, Nicolás Romero sees daytime highs around 26°C and nights near 12°C. Pack sun protection. Worth having: light clothes and rain gear. About 10 days see rain.

sun protectionlight clothesrain gear

UV index in Nicolás Romero in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nicolás Romero peaks around June 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highJun 16UV 14Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun14Extreme
Jul12Extreme
Aug14Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Nicolás Romero in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Nicolás Romero is worst in December — around 179 µg/m³ PM2.5 (very unhealthy), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090120150180210JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyDec 11178 µg/m³Apr 14115 µg/m³
PM2.5 (µg/m³)Level
Jan149Unhealthy
Feb141Unhealthy
Mar126Unhealthy
Apr113Unhealthy
May134Unhealthy
Jun126Unhealthy
Jul135Unhealthy
Aug127Unhealthy
Sep136Unhealthy
Oct137Unhealthy
Nov174Very unhealthy
Dec179Very unhealthy
Location & terrain

Where is Nicolás Romero?

Nicolás Romero sits at 19.6°N, 99.3°W, 2,404 m above sea level, in Mexico. The nearest listed city is Huilango, 7.0 km away.

Topography around Nicolás Romero

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nicolás Romero.

Within 3 km, the terrain around Nicolás Romero has only modest variations in elevation — a maximum elevation change of 201 m around an average of 2,382 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 829 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,271 m.

The land around Nicolás Romero is covered by artificial surfaces (44%) within 3 km, trees (32%) and artificial surfaces (31%) within 16 km, and cropland (29%) and trees (27%) within 80 km.

3 km
201 m
16 km
829 m
80 km
3,271 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Huilango 7.0 km · Cuautitlán Izcalli 10 km · Ciudad López Mateos 11 km · Tepotzotlán 12 km · Cuautitlán 14 km · Tultitlán de Mariano Escobedo 15 km · Buenavista 15 km · Tlalnepantla 16 km

Mexico travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 / 127 V · 60 Hz
Prices
≈ 54% of US
price level, 2025
GDP per capita
$13,889
2025
Happiness
7.0 / 10
World Happiness, 2025
Safe drinking water
43%
of population, 2024
Homicide rate
24.9
per 100k, 2023
Road deaths
12.8
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 440
Religion
Catholic 78%no religion 11%other Evangelical Churches 8%Jehovah Witness 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 Nicolás Romero (19.6418°, -99.3068°, elevation 2,404 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).