Ocotlán de Morelos weather in September

In September, Ocotlán de Morelos sees average daytime highs of 25°C and overnight lows near 15°C, with 156 mm of rain across 18.3 wet days and about 12.1 hours of daylight. It is the 11th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°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 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Ocotlán de Morelos's 12th-clearest and 12th-windiest month. For the whole year in context, see Ocotlán de Morelos's year-round climate.

Daytime high
25°
11th warmest
Overnight low
15°
10th coldest
Rainfall
156 mm
18.3 wet days
Daylight
12 h 06 min
6:18 AM – 6:24 PM
Cloud cover
82%
12th clearest
Wind
5 km/h
12th windiest
Solar energy
5 kWh/m²
Travel score
5.2
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical September day in Ocotlán de Morelos reaches about 25°C in the afternoon and slips back to 15°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 27°C. Set against its neighbours, September runs about 1°C cooler than August and on par with October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12515
22515
32515
42515
52515
62515
72515
82515
92515
102515
112515
122515
132515
142515
152515
162515
172515
182515
192515
202515
212515
222515
232515
242515
252515
262515
272515
282514
292514
302514

Ocotlán de Morelos weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 10°20.811.18.9
Feb27° / 10°30.811.48.6
Mar28° / 12°122.311.97.6
Apr29° / 13°254.412.46.3
May28° / 15°8310.412.85.8
Jun26° / 15°15517135.3
Jul26° / 14°9514.412.95.8
Aug26° / 14°1151512.65.7
Sep25° / 15°15618.312.15.2
Oct25° / 13°819.511.66.8
Nov25° / 11°121.911.28.4
Dec25° / 10°30.7118.9

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 11% of September, with mostly cloudy or overcast conditions the remaining 83%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12080
21882
31882
41882
51783
61684
71684
81684
91585
101585
111585
121585
131585
141486
151486
161486
171486
181585
191585
201585
211585
221585
231585
241684
251783
261981
271981
282179
292278
302377

Chance of precipitation in September

Any precipitation

Ocotlán de Morelos gets around 156 mm of rain over 18.3 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 60% and peaks near 62% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
161
261
361
462
562
662
762
862
962
1061
1161
1260
1360
1460
1560
1660
1760
1860
1960
2060
2160
2260
2359
2458
2558
2657
2756
2855
2954
3053

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 69% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1136819
2136819
3126919
4126820
5126820
6116920
7116821
8106921
9106921
1097021
1197021
1287121
1387121
1487121
1587121
1687121
1777221
1877221
1977221
2077221
2187121
2287121
2397021
24107020
25116920
26126820
27146620
28156520
29166519
30176419

Wind in September

Winds average 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 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
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 6:16 AM to 6:20 AM, and sunset from 6:36 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:166:36
212.36:176:36
312.36:176:35
412.36:176:34
512.36:176:33
612.36:176:32
712.26:176:31
812.26:176:31
912.26:176:30
1012.26:186:29
1112.26:186:28
1212.26:186:27
1312.16:186:26
1412.16:186:26
1512.16:186:25
1612.16:186:24
1712.16:186:23
1812.16:186:22
1912.06:196:21
2012.06:196:20
2112.06:196:20
2212.06:196:19
2312.06:196:18
2412.06:196:17
2511.96:196:16
2611.96:196:15
2711.96:206:14
2811.96:206:14
2911.96:206:13
3011.96:206:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 5 kWh/m² to a high of 7.16 kWh/m² in April across the year — September's 5 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in September

Hazard calendar for Ocotlán de Morelos

In seasonPeak

In September, Ocotlán de Morelos sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Ocotlán de Morelos's rainy season runs May–October, when most of the year's rain falls.

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

Is September a good time to visit Ocotlán de Morelos?

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

5.2
Sightseeing
12th-best month of the year
4.8
Beach & pool
12th-best month of the year

September is a reasonable time to visit Ocotlán de Morelos for sightseeing.

What to pack for Ocotlán de Morelos in September

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

In September, Ocotlán de Morelos sees daytime highs around 25°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 18 days see rain.

rain gearlight clothessun protection

UV index in Ocotlán de Morelos in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ocotlán de Morelos peaks around April 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 13UV 15Dec 15UV 9
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar14Extreme
Apr15Extreme
May12Extreme
Jun13Extreme
Jul13Extreme
Aug14Extreme
Sep13Extreme
Oct12Extreme
Nov9Very high
Dec9Very high

Air quality in Ocotlán de Morelos 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 Ocotlán de Morelos is worst in May — around 27 µg/m³ PM2.5 (moderate), about 3.8× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1626 µg/m³Jan 137 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar10Good
Apr19Moderate
May27Moderate
Jun17Moderate
Jul20Moderate
Aug16Moderate
Sep15Moderate
Oct12Good
Nov9Good
Dec8Good
Location & terrain

Where is Ocotlán de Morelos?

Ocotlán de Morelos sits at 16.8°N, 96.7°W, 1,523 m above sea level, in Mexico. The nearest listed city is San Antonio de la Cal, 27 km away.

Topography around Ocotlán de Morelos

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

Within 3 km, the terrain around Ocotlán de Morelos has only modest variations in elevation — a maximum elevation change of 165 m around an average of 1,514 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,122 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,164 m.

The land around Ocotlán de Morelos is covered by cropland (53%) within 3 km, grassland (32%) and cropland (30%) within 16 km, and trees (65%) within 80 km.

3 km
165 m
16 km
1,122 m
80 km
3,164 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: San Antonio de la Cal 27 km · Santa Cruz Xoxocotlán 27 km · Oaxaca 30 km · Santa María Atzompa 36 km · Miahuatlán de Porfirio Díaz 52 km · Puerto Escondido 112 km · Heroica Ciudad de Tlaxiaco 119 km · Crucecita 128 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 Ocotlán de Morelos (16.7918°, -96.675°, elevation 1,523 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).