Chapala weather in September

In September, Chapala sees average daytime highs of 26°C and overnight lows near 17°C, with 138 mm of rain across 19.8 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 26°C through the month. The sky is clear or mostly clear about 11% 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 Chapala's 12th-clearest and 10th-windiest month. For the whole year in context, see Chapala's year-round climate.

Daytime high
26°
8th warmest
Overnight low
17°
9th coldest
Rainfall
138 mm
19.8 wet days
Daylight
12 h 06 min
6:44 AM – 6:51 PM
Cloud cover
73%
12th clearest
Wind
5 km/h
10th windiest
Solar energy
5.09 kWh/m²
Travel score
5.0
out of 10

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

Density
3,599/km²
people per km²
Founded
1200

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 26°C through the month.

A typical September day in Chapala reaches about 26°C in the afternoon and slips back to 17°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 28°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)
12617
22617
32617
42617
52617
62617
72617
82617
92617
102617
112617
122617
132617
142617
152617
162617
172617
182617
192617
202617
212617
222617
232617
242617
252617
262617
272617
282617
292617
302616

Chapala 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°171.710.98.6
Feb26° / 11°111.611.38.5
Mar28° / 13°6111.97.9
Apr30° / 15°30.912.56.2
May31° / 16°164.212.95.3
Jun29° / 18°1161813.24.6
Jul26° / 17°17324.713.14.4
Aug26° / 17°15723.912.74.5
Sep26° / 17°13819.812.15.0
Oct26° / 15°458.311.57.0
Nov25° / 13°122.1118.5
Dec24° / 11°6110.88.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% 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 71%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12377
22278
32377
42377
52476
62476
72476
82575
92674
102773
112773
122872
132971
142971
152971
163070
173070
183169
193169
203169
213268
223169
233169
243268
253268
263466
273367
283466
293565
303565

Chance of precipitation in September

Any precipitation

Chapala gets around 138 mm of rain over 19.8 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 65% and peaks near 76% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
176
276
375
475
574
674
773
872
972
1071
1170
1269
1368
1467
1566
1665
1764
1863
1962
2061
2160
2259
2358
2457
2555
2654
2753
2851
2950
3049

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 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
101486
201486
311485
411584
511584
611683
711683
811782
911881
1011881
1111980
1212079
1312079
1412178
1512178
1612277
1712376
1822375
1922474
2022474
2132572
2242670
2342670
2452768
2572766
2682864
2792962
28102961
29103060
30113059

Wind in September

Winds average 5 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
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 6:40 AM to 6:47 AM, and sunset from 7:05 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:407:05
212.46:407:04
312.46:417:03
412.36:417:02
512.36:417:01
612.36:417:00
712.36:426:59
812.36:426:58
912.36:426:57
1012.26:426:56
1112.26:436:55
1212.26:436:54
1312.26:436:53
1412.26:436:52
1512.16:436:51
1612.16:446:51
1712.16:446:50
1812.16:446:49
1912.16:446:48
2012.06:456:47
2112.06:456:46
2212.06:456:45
2312.06:456:44
2412.06:456:43
2511.96:466:42
2611.96:466:41
2711.96:466:40
2811.96:466:39
2911.96:476:38
3011.86:476:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.09 kWh/m².

For context, solar energy here swings from a low near 4.74 kWh/m² to a high of 7.5 kWh/m² in April across the year — September's 5.09 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in September

Hazard calendar for Chapala

In seasonPeak

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

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

Chapala'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 Chapala?

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

5.0
Sightseeing
9th-best month of the year
4.8
Beach & pool
10th-best month of the year

September is a reasonable time to visit Chapala for sightseeing.

What to pack for Chapala in September

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

In September, Chapala sees daytime highs around 26°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 20 days see rain.

rain gearlight clothessun protection

UV index in Chapala 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 Chapala peaks around May 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 13UV 14Dec 16UV 7
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May14Extreme
Jun13Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Chapala 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 Chapala is worst in May — around 44 µg/m³ PM2.5 (poor), about 3.2× the cleanest month (July, 14 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 1342 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb18Moderate
Mar20Moderate
Apr33Moderate
May44Poor
Jun17Moderate
Jul14Moderate
Aug15Moderate
Sep17Moderate
Oct17Moderate
Nov18Moderate
Dec21Moderate
Location & terrain

Where is Chapala?

Chapala sits at 20.3°N, 103.2°W, 1,561 m above sea level, in Mexico. The nearest listed city is San José del Castillo, 25 km away.

Topography around Chapala

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

Within 3 km, the terrain around Chapala has only modest variations in elevation — a maximum elevation change of 211 m around an average of 1,544 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 957 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,137 m.

The land around Chapala is covered by water (52%) within 3 km, water (50%) and trees (20%) within 16 km, and trees (37%) and cropland (25%) within 80 km.

3 km
211 m
16 km
957 m
80 km
2,137 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: San José del Castillo 25 km · Jocotepec 25 km · San José del Quince 29 km · Hacienda Santa Fe 32 km · Las Pintitas 32 km · Lomas del Sur 33 km · Tlajomulco de Zúñiga 34 km · Las Pintas de Arriba 34 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 Chapala (20.2925°, -103.1896°, elevation 1,561 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).