Ocotlán weather in September

In September, Ocotlán sees average daytime highs of 27°C and overnight lows near 17°C, with 95 mm of rain across 17.1 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 15% of the time in September, and the air most often feels humid.

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 Ocotlán's 12th-clearest and 9th-windiest month. For the whole year in context, see Ocotlán's year-round climate.

Daytime high
27°
8th warmest
Overnight low
17°
8th coldest
Rainfall
95 mm
17.1 wet days
Daylight
12 h 06 min
6:42 AM – 6:49 PM
Cloud cover
70%
12th clearest
Wind
5 km/h
9th windiest
Solar energy
5.18 kWh/m²
Travel score
5.3
out of 10

Ocotlán is municipal seat of Ocotlán, State of Jalisco, Mexico.

Density
3,989/km²
people per km²

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 27°C through the month.

A typical September day in Ocotlán reaches about 27°C in the afternoon and slips back to 17°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°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)
12717
22717
32717
42717
52717
62717
72717
82717
92717
102717
112717
122717
132717
142717
152717
162717
172717
182717
192717
202717
212717
222717
232717
242717
252717
262717
272717
282717
292717
302717

Ocotlán weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 10°161.910.98.6
Feb26° / 12°111.711.38.5
Mar28° / 13°91.311.97.8
Apr30° / 15°41.412.56.1
May31° / 17°205.2135.2
Jun29° / 18°8816.613.24.5
Jul27° / 17°11021.513.14.8
Aug27° / 17°9720.412.74.8
Sep27° / 17°9517.112.15.3
Oct27° / 16°397.611.56.9
Nov26° / 13°142.6118.3
Dec24° / 11°61.410.88.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 67%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12971
22971
32872
42872
52971
62971
72971
83070
93070
103070
113070
123268
133268
143367
153466
163466
173466
183466
193565
203565
213565
223565
233664
243664
253763
263763
273862
283862
293961
304060

Chance of precipitation in September

Any precipitation

Ocotlán gets around 95 mm of rain over 17.1 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 56% and peaks near 69% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
169
268
368
467
567
666
765
864
963
1062
1161
1260
1359
1458
1557
1656
1755
1854
1953
2052
2151
2250
2349
2447
2546
2645
2744
2843
2942
3041

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 61% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
122672
222672
322672
422672
522771
622771
722870
822969
933067
1033166
1133265
1233364
1333364
1443462
1543462
1643561
1753560
1853560
1963559
2073558
2183557
2293556
23103555
24123553
25133552
26153451
27163550
28173548
29183547
30193646

Wind in September

Winds average 5 km/h in September.

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 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 6:39 AM to 6:45 AM, and sunset from 7:03 PM to 6:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:397:03
212.46:397:02
312.46:397:01
412.46:397:00
512.36:396:59
612.36:406:58
712.36:406:57
812.36:406:57
912.36:406:56
1012.26:416:55
1112.26:416:54
1212.26:416:53
1312.26:416:52
1412.26:426:51
1512.16:426:50
1612.16:426:49
1712.16:426:48
1812.16:426:47
1912.16:436:46
2012.06:436:45
2112.06:436:44
2212.06:436:43
2312.06:446:42
2412.06:446:41
2511.96:446:40
2611.96:446:39
2711.96:456:38
2811.96:456:37
2911.96:456:36
3011.86:456:35

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.18 kWh/m².

For context, solar energy here swings from a low near 4.78 kWh/m² to a high of 7.48 kWh/m² in April across the year — September's 5.18 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for Ocotlán

In seasonPeak

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

Ocotlán sits in the eastern Pacific hurricane zone; the season peaks August–September.

Ocotlán's rainy season runs June–September, when most of the year's rain falls.

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

Is September a good time to visit Ocotlán?

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

5.3
Sightseeing
8th-best month of the year
5.4
Beach & pool
10th-best month of the year

September is a reasonable time to visit Ocotlán for sightseeing.

What to pack for Ocotlán in September

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

In September, Ocotlán sees daytime highs around 27°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 17 days see rain.

rain gearlight clothessun protection

UV index in Ocotlán in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Ocotlán peaks around May 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 highMay 18UV 13Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun13Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Ocotlán 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 is worst in May — around 32 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (July, 15 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1032 µg/m³Jul 2015 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb20Moderate
Mar21Moderate
Apr31Moderate
May32Moderate
Jun17Moderate
Jul15Moderate
Aug16Moderate
Sep18Moderate
Oct18Moderate
Nov20Moderate
Dec25Moderate
Location & terrain

Where is Ocotlán?

Ocotlán sits at 20.4°N, 102.8°W, 1,553 m above sea level, in Mexico. The nearest listed city is Jamay, 9.0 km away.

Topography around Ocotlán

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

Within 3 km, the terrain around Ocotlán has only modest variations in elevation — a maximum elevation change of 156 m around an average of 1,531 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 592 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,688 m.

The land around Ocotlán is covered by artificial surfaces (44%) and cropland (35%) within 3 km, cropland (44%) and water (21%) within 16 km, and cropland (31%) and trees (29%) within 80 km.

3 km
156 m
16 km
592 m
80 km
2,688 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Jamay 9.0 km · La Barca 25 km · Sahuayo de Morelos 33 km · Atotonilco el Alto 35 km · Jiquilpan de Juárez 40 km · Zapotlanejo 43 km · Chapala 44 km · Yurécuaro 51 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 (20.3512°, -102.7683°, elevation 1,553 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).