Arandas weather in September

In September, Arandas sees average daytime highs of 24°C and overnight lows near 14°C, with 187 mm of rain across 19.6 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 15% 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 Arandas's 12th-clearest and 9th-windiest month. For the whole year in context, see Arandas's year-round climate.

Daytime high
24°
7th warmest
Overnight low
14°
8th coldest
Rainfall
187 mm
19.6 wet days
Daylight
12 h 06 min
6:40 AM – 6:47 PM
Cloud cover
70%
12th clearest
Wind
8 km/h
9th windiest
Solar energy
5.46 kWh/m²
Travel score
5.3
out of 10

Arandas is city of Jalisco State, Mexico; municipal seat of Arandas Municipality.

Density
3,478/km²
people per km²
Founded
1761

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 24°C through the month.

A typical September day in Arandas reaches about 24°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 22°C and 26°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)
12414
22414
32414
42414
52414
62414
72414
82414
92414
102414
112414
122414
132414
142414
152414
162414
172414
182414
192414
202414
212414
222414
232414
242414
252414
262414
272414
282413
292413
302413

Arandas weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 182.710.98.0
Feb24° / 121.911.38.6
Mar26° / 11°112.111.98.4
Apr28° / 13°92.112.57.4
May29° / 15°477.8136.0
Jun27° / 15°19118.513.25.0
Jul25° / 14°25823.913.14.7
Aug25° / 14°22222.112.75.0
Sep24° / 14°18719.612.15.3
Oct24° / 12°689.711.57.2
Nov23° / 10°173.2118.4
Dec22° / 71.510.88.2

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 68%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12971
22971
32971
42872
52971
62971
73070
83070
93070
103169
113169
123169
133169
143268
153268
163268
173268
183268
193268
203268
213268
223268
233466
243466
253664
263664
273763
283862
293862
303862

Chance of precipitation in September

Any precipitation

Arandas gets around 187 mm of rain over 19.6 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 64% and peaks near 75% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
175
275
375
474
574
674
773
873
972
1071
1170
1269
1368
1467
1566
1665
1765
1864
1962
2061
2160
2258
2357
2455
2554
2652
2751
2850
2949
3048

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 60% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1177112
2187012
3187012
4187012
5196813
6196813
7206713
8206713
9216613
10226414
11236314
12246214
13246214
14256114
15266014
16275914
17276013
18285913
19295912
20315811
21325711
22345610
2335569
2437549
2539538
2641527
2742517
2844506
2945506
3046495

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 6:37 AM to 6:44 AM, and sunset from 7:02 PM to 6:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:377:02
212.46:377:01
312.46:377:00
412.46:376:59
512.36:386:58
612.36:386:57
712.36:386:56
812.36:386:55
912.36:396:54
1012.26:396:53
1112.26:396:52
1212.26:396:51
1312.26:396:50
1412.26:406:49
1512.16:406:48
1612.16:406:47
1712.16:406:46
1812.16:416:45
1912.16:416:44
2012.06:416:43
2112.06:416:42
2212.06:426:41
2312.06:426:40
2412.06:426:39
2511.96:426:38
2611.96:436:37
2711.96:436:37
2811.96:436:36
2911.96:436:35
3011.86:446:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.46 kWh/m².

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 7.58 kWh/m² in April across the year — September's 5.46 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.4Bright
305.4Bright
Planning a trip in September

Hazard calendar for Arandas

In seasonPeak

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

Arandas'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 Arandas?

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

5.3
Sightseeing
9th-best month of the year
4.6
Beach & pool
10th-best month of the year

September is a reasonable time to visit Arandas for sightseeing.

What to pack for Arandas in September

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

In September, Arandas sees daytime highs around 24°C and nights near 14°C. Pack rain gear. Worth having: light clothes and sun protection. About 20 days see rain.

rain gearlight clothessun protection

UV index in Arandas 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 Arandas peaks around May 19 at about 14 (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 19UV 14Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar13Extreme
Apr14Extreme
May14Extreme
Jun14Extreme
Jul13Extreme
Aug13Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec7Very high

Air quality in Arandas 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 Arandas is worst in May — around 21 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1420 µg/m³Oct 1814 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb17Moderate
Mar16Moderate
Apr17Moderate
May21Moderate
Jun15Moderate
Jul16Moderate
Aug15Moderate
Sep17Moderate
Oct14Moderate
Nov16Moderate
Dec20Moderate
Location & terrain

Where is Arandas?

Arandas sits at 20.7°N, 102.3°W, 2,053 m above sea level, in Mexico. The nearest listed city is Atotonilco el Alto, 24 km away.

Topography around Arandas

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

Within 3 km, the terrain around Arandas has only modest variations in elevation — a maximum elevation change of 121 m around an average of 2,072 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 696 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,539 m.

The land around Arandas is covered by cropland (29%), artificial surfaces (29%) and trees (25%) within 3 km, cropland (47%) and trees (25%) within 16 km, and cropland (41%) and shrubs (21%) within 80 km.

3 km
121 m
16 km
696 m
80 km
1,539 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Atotonilco el Alto 24 km · San Miguel el Alto 37 km · Yurécuaro 41 km · Tepatitlán de Morelos 45 km · La Barca 51 km · La Piedad de Cabadas 53 km · Jalostotitlán 53 km · Ocotlán 59 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 Arandas (20.7055°, -102.3451°, elevation 2,053 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).