Purísima de Bustos weather in September

In September, Purísima de Bustos sees average daytime highs of 26°C and overnight lows near 15°C, with 113 mm of rain across 15.3 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 4th-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 21% 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 Purísima de Bustos's 12th-clearest and 8th-windiest month. For the whole year in context, see Purísima de Bustos's year-round climate.

Daytime high
26°
8th warmest
Overnight low
15°
8th coldest
Rainfall
113 mm
15.3 wet days
Daylight
12 h 06 min
6:38 AM – 6:45 PM
Cloud cover
65%
12th clearest
Wind
8 km/h
8th windiest
Solar energy
5.57 kWh/m²
Travel score
5.8
out of 10

Purísima de Bustos is municipal seat of Purísima, State of Guanajuato, Mexico.

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 Purísima de Bustos reaches about 26°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 23°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)
12615
22615
32615
42615
52515
62515
72515
82515
92515
102515
112515
122515
132515
142615
152615
162615
172615
182615
192615
202615
212615
222615
232615
242615
252615
262614
272614
282614
292614
302614

Purísima de Bustos weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 172.610.98.3
Feb25° / 132.311.38.5
Mar27° / 11°111.811.98.0
Apr30° / 14°81.812.56.4
May31° / 16°336.1135.4
Jun28° / 16°12314.413.35.1
Jul26° / 15°14919.313.15.3
Aug26° / 15°12517.712.75.5
Sep26° / 15°11315.312.15.8
Oct26° / 13°447.211.57.3
Nov25° / 10°143118.5
Dec23° / 71.510.78.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
34060
44060
53961
63961
73961
83961
94060
103961
114060
124159
134159
144159
154258
164159
174159
184159
194258
204258
214258
224258
234258
244258
254456
264555
274555
284555
294654
304654

Chance of precipitation in September

Any precipitation

Purísima de Bustos gets around 113 mm of rain over 15.3 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 50% and peaks near 60% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
160
260
359
459
559
659
759
858
958
1057
1156
1255
1355
1454
1553
1652
1751
1850
1949
2047
2146
2244
2343
2441
2540
2639
2737
2836
2935
3034

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 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1256015
2256015
3255916
4255916
5265717
6265717
7265717
8275617
9275518
10285418
11285418
12295318
13305218
14315118
15315118
16325018
17335017
18345016
19355016
20364915
21374814
22394714
23414613
24434512
25454411
26474311
27494210
2850419
2952408
3054397

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 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
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
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 6:35 AM to 6:42 AM, and sunset from 7:00 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:357:00
212.46:356:59
312.46:356:58
412.46:356:57
512.36:366:56
612.36:366:55
712.36:366:54
812.36:366:53
912.36:376:52
1012.26:376:51
1112.26:376:50
1212.26:376:49
1312.26:386:48
1412.26:386:47
1512.16:386:46
1612.16:386:45
1712.16:396:44
1812.16:396:43
1912.16:396:42
2012.06:396:41
2112.06:406:40
2212.06:406:39
2312.06:406:38
2412.06:406:37
2511.96:416:37
2611.96:416:36
2711.96:416:35
2811.96:416:34
2911.96:426:33
3011.86:426:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.57 kWh/m².

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 7.61 kWh/m² in April across the year — September's 5.57 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Purísima de Bustos

In seasonPeak

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

Purísima de Bustos's rainy season runs June–September, 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 Purísima de Bustos?

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

5.8
Sightseeing
8th-best month of the year
5.5
Beach & pool
10th-best month of the year

September is a reasonable time to visit Purísima de Bustos for sightseeing.

What to pack for Purísima de Bustos in September

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

In September, Purísima de Bustos sees daytime highs around 26°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 15 days see rain.

rain gearlight clothessun protection

UV index in Purísima de Bustos 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 Purísima de Bustos peaks around April 23 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 highApr 23UV 14Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar13Extreme
Apr14Extreme
May14Extreme
Jun14Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec7High

Air quality in Purísima de Bustos 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 Purísima de Bustos 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 Purísima de Bustos?

Purísima de Bustos sits at 21.0°N, 101.9°W, 1,779 m above sea level, in Mexico. The nearest listed city is San Francisco del Rincón, 2.0 km away.

Topography around Purísima de Bustos

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

Within 3 km, the terrain around Purísima de Bustos has significant variations in elevation — a maximum elevation change of 414 m around an average of 1,796 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 471 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,399 m.

The land around Purísima de Bustos is covered by artificial surfaces (42%) and shrubs (21%) within 3 km, shrubs (35%) and cropland (35%) within 16 km, and shrubs (34%) and cropland (33%) within 80 km.

3 km
414 m
16 km
471 m
80 km
1,399 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: San Francisco del Rincón 2.0 km · Centro Familiar la Soledad 18 km · La Ermita 20 km · León de los Aldama 23 km · Medina 30 km · Lagos de Moreno 37 km · Romita 41 km · Silao de la Victoria 48 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 Purísima de Bustos (21.0297°, -101.8778°, elevation 1,779 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).