Cuernavaca weather in September

In September, Cuernavaca sees average daytime highs of 23°C and overnight lows near 14°C, with 271 mm of rain across 26.4 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 6% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Cuernavaca's 12th-clearest and 9th-windiest month. For the whole year in context, see Cuernavaca's year-round climate.

Daytime high
23°
9th warmest
Overnight low
14°
11th coldest
Rainfall
271 mm
26.4 wet days
Daylight
12 h 06 min
6:28 AM – 6:34 PM
Cloud cover
77%
12th clearest
Wind
4 km/h
9th windiest
Solar energy
5.3 kWh/m²
Travel score
4.1
out of 10

Cuernavaca is capital of the State of Morelos, Mexico.

Air quality
Elevated
PM2.5 19 µg/m³ · 2018
Density
2,240/km²
people per km²
Founded
1714

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 23°C through the month.

A typical September day in Cuernavaca reaches about 23°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 25°C. Set against its neighbours, September runs on par with August and on par with October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12314
22314
32314
42314
52314
62314
72314
82314
92314
102314
112314
122314
132314
142314
152314
162314
172314
182314
192314
202314
212314
222314
232314
242314
252314
262313
272313
282313
292313
302313

Cuernavaca weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 111.6118.4
Feb24° / 10211.48.8
Mar26° / 10°133.211.98.3
Apr27° / 12°326.712.47.2
May26° / 13°13916.712.95.7
Jun24° / 14°2592513.14.4
Jul24° / 13°20226.4134.3
Aug24° / 14°24227.612.64.2
Sep23° / 14°27126.412.14.1
Oct23° / 12°11616.311.65.9
Nov23° / 10°286.211.17.8
Dec22° / 71.310.98.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 78%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11882
21783
31882
41882
51882
61882
71981
81981
92080
102080
112179
122179
132278
142278
152278
162377
172377
182377
192476
202377
212476
222476
232476
242575
252674
262674
272773
282872
292971
302971

Chance of precipitation in September

Any precipitation

Cuernavaca gets around 271 mm of rain over 26.4 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 87% and peaks near 93% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
193
293
392
492
592
692
792
891
991
1090
1190
1289
1389
1488
1588
1687
1787
1887
1986
2086
2185
2285
2384
2483
2582
2681
2780
2878
2977
3076

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
17876
27876
37876
47876
57876
67876
77876
88866
98866
109856
119847
129847
1310837
1410837
1511827
1611827
1711818
1812808
1912808
2013798
2114788
2214797
2315787
2416777
2518766
2619756
2720755
2821745
2922744
3023734

Wind in September

Winds average 4 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over September. Sunrise moves from 6:25 AM to 6:31 AM, and sunset from 6:48 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:256:48
212.46:266:47
312.36:266:46
412.36:266:45
512.36:266:44
612.36:266:44
712.36:266:43
812.36:276:42
912.26:276:41
1012.26:276:40
1112.26:276:39
1212.26:276:38
1312.26:286:37
1412.16:286:36
1512.16:286:35
1612.16:286:34
1712.16:286:34
1812.16:286:33
1912.16:296:32
2012.06:296:31
2112.06:296:30
2212.06:296:29
2312.06:296:28
2412.06:306:27
2511.96:306:26
2611.96:306:25
2711.96:306:24
2811.96:306:23
2911.96:316:23
3011.86:316:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.3 kWh/m².

For context, solar energy here swings from a low near 5 kWh/m² to a high of 7.12 kWh/m² in April across the year — September's 5.3 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for Cuernavaca

In seasonPeak

In September, Cuernavaca sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Cuernavaca's monsoon runs May–September, when most of the year's rain falls.

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

Is September a good time to visit Cuernavaca?

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

4.1
Sightseeing
12th-best month of the year
3.3
Beach & pool
12th-best month of the year

September is a reasonable time to visit Cuernavaca for sightseeing.

What to pack for Cuernavaca in September

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

In September, Cuernavaca sees daytime highs around 23°C and nights near 14°C. Pack rain gear. Worth having: light clothes and sun protection. About 26 days see rain.

rain gearlight clothessun protection

UV index in Cuernavaca in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cuernavaca peaks around April 9 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 9UV 13Dec 14UV 7
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May11Extreme
Jun12Extreme
Jul11Extreme
Aug12Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7Very high

Air quality in Cuernavaca in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Cuernavaca is worst in November — around 25 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (April, 14 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Cuernavaca's WHO annual average of 19 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateNov 2125 µg/m³Apr 914 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb17Moderate
Mar14Moderate
Apr14Moderate
May19Moderate
Jun17Moderate
Jul17Moderate
Aug17Moderate
Sep20Moderate
Oct22Moderate
Nov25Moderate
Dec25Moderate
Location & terrain

Where is Cuernavaca?

Cuernavaca sits at 18.9°N, 99.2°W, 1,540 m above sea level, in Mexico. The nearest listed city is Tres de Mayo, 7.0 km away.

Topography around Cuernavaca

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

Within 3 km, the terrain around Cuernavaca has significant variations in elevation — a maximum elevation change of 331 m around an average of 1,543 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,328 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,726 m.

The land around Cuernavaca is covered by artificial surfaces (62%) and trees (28%) within 3 km, trees (49%) and shrubs (21%) within 16 km, and trees (46%) within 80 km.

3 km
331 m
16 km
2,328 m
80 km
4,726 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Tres de Mayo 7.0 km · Jiutepec 7.0 km · Temixco 8.0 km · Emiliano Zapata 11 km · Xochitepec 16 km · Yautepec 18 km · Santa Rosa Treinta 26 km · Xoxocotla 27 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 Cuernavaca (18.9261°, -99.2308°, elevation 1,540 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).