Ahualulco de Mercado weather in September

In September, Ahualulco de Mercado sees average daytime highs of 28°C and overnight lows near 17°C, with 148 mm of rain across 19.8 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 12% 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 Ahualulco de Mercado's 12th-clearest and 10th-windiest month. For the whole year in context, see Ahualulco de Mercado's year-round climate.

Daytime high
28°
7th warmest
Overnight low
17°
9th coldest
Rainfall
148 mm
19.8 wet days
Daylight
12 h 06 min
6:47 AM – 6:54 PM
Cloud cover
73%
12th clearest
Wind
5 km/h
10th windiest
Solar energy
5.35 kWh/m²
Travel score
4.8
out of 10

Ahualulco de Mercado is municipal seat of Ahualulco, State of Jalisco, Mexico.

Density
2,585/km²
people per km²
Founded
1531

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 28°C through the month.

A typical September day in Ahualulco de Mercado reaches about 28°C in the afternoon and slips back to 17°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 30°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12817
22817
32817
42817
52817
62817
72817
82817
92817
102817
112817
122817
132817
142817
152817
162817
172817
182817
192817
202817
212817
222817
232817
242817
252817
262817
272817
282817
292817
302817

How September really feels in Ahualulco de Mercado

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ahualulco de Mercado weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 202.210.98.4
Feb27° / 10°151.811.38.1
Mar29° / 11°6111.96.8
Apr31° / 12°51.412.55.4
May33° / 15°144134.4
Jun31° / 17°12918.213.23.7
Jul28° / 17°18824.613.13.8
Aug28° / 17°1632412.74.0
Sep28° / 17°14819.812.14.8
Oct28° / 16°598.911.56.6
Nov27° / 12°142.5118.1
Dec25° / 111.810.88.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% 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%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12575
22575
32575
42575
52674
62674
72674
82674
92773
102971
112971
122971
132971
142971
152971
162971
172971
183070
193070
203070
213070
223070
233070
243169
253268
263367
273367
283664
293664
303763

Chance of precipitation in September

Any precipitation

Ahualulco de Mercado gets around 148 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 77% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
177
276
376
475
574
674
773
872
971
1070
1169
1268
1367
1466
1566
1665
1764
1863
1962
2062
2161
2260
2359
2458
2556
2655
2754
2853
2951
3050

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. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1038314
2038314
3038314
4138214
5138313
6148114
7148114
8148114
9148114
10157915
11157816
12157816
13167617
14167617
15167518
16167518
17177319
18177319
19187219
20187219
21297118
22297118
233107017
244116817
254126816
265136715
276146614
286156613
297156612
307166611

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 6:43 AM to 6:50 AM, and sunset from 7:08 PM to 6:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:437:08
212.46:437:07
312.46:447:06
412.46:447:05
512.36:447:04
612.36:447:03
712.36:457:02
812.36:457:02
912.36:457:01
1012.26:457:00
1112.26:466:59
1212.26:466:58
1312.26:466:57
1412.26:466:56
1512.16:466:55
1612.16:476:54
1712.16:476:53
1812.16:476:52
1912.16:476:51
2012.06:486:50
2112.06:486:49
2212.06:486:48
2312.06:486:47
2412.06:496:46
2511.96:496:45
2611.96:496:44
2711.96:496:43
2811.96:506:42
2911.96:506:41
3011.86:506:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.35 kWh/m².

For context, solar energy here swings from a low near 4.69 kWh/m² to a high of 7.54 kWh/m² in April across the year — September's 5.35 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in September

Hazard calendar for Ahualulco de Mercado

In seasonPeak

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

Ahualulco de Mercado's monsoon runs June–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 Ahualulco de Mercado?

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

4.8
Sightseeing
8th-best month of the year
5.1
Beach & pool
10th-best month of the year

September is a reasonable time to visit Ahualulco de Mercado for sightseeing.

What to pack for Ahualulco de Mercado in September

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

In September, Ahualulco de Mercado sees daytime highs around 28°C and nights near 17°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in Ahualulco de Mercado 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 Ahualulco de Mercado peaks around April 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighApr 22UV 13Dec 16UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar12Extreme
Apr13Extreme
May13Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec7High

Air quality in Ahualulco de Mercado 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 Ahualulco de Mercado is worst in May — around 40 µg/m³ PM2.5 (poor), about 6.2× the cleanest month (January, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodMay 1737 µg/m³Jan 187 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar10Good
Apr17Moderate
May40Poor
Jun18Moderate
Jul10Good
Aug10Good
Sep10Good
Oct8Good
Nov7Good
Dec7Good
Location & terrain

Where is Ahualulco de Mercado?

Ahualulco de Mercado sits at 20.7°N, 104.0°W, 1,325 m above sea level, in Mexico. The nearest listed city is Ameca, 19 km away.

Topography around Ahualulco de Mercado

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

Within 3 km, the terrain around Ahualulco de Mercado has only modest variations in elevation — a maximum elevation change of 69 m around an average of 1,328 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,623 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,574 m.

The land around Ahualulco de Mercado is covered by cropland (67%) within 3 km, trees (40%) and cropland (33%) within 16 km, and trees (49%) within 80 km.

3 km
69 m
16 km
1,623 m
80 km
2,574 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ameca 19 km · Magdalena 23 km · Tequila 25 km · Tala 29 km · Cocula 41 km · San Francisco Tesistán 53 km · Ixtlán del Río 55 km · San Agustín 56 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 Ahualulco de Mercado (20.7014°, -103.9746°, elevation 1,325 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).