Pénjamo weather in September

In September, Pénjamo sees average daytime highs of 26°C and overnight lows near 15°C, with 124 mm of rain across 16.5 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 16% 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 Pénjamo's 12th-clearest and 7th-windiest month. For the whole year in context, see Pénjamo's year-round climate.

Daytime high
26°
8th warmest
Overnight low
15°
8th coldest
Rainfall
124 mm
16.5 wet days
Daylight
12 h 06 min
6:38 AM – 6:45 PM
Cloud cover
68%
12th clearest
Wind
7 km/h
7th windiest
Solar energy
5.51 kWh/m²
Travel score
5.5
out of 10

Pénjamo is municipal seat of Pénjamo, State of Guanajuato, Mexico.

Founded
1542

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 Pénjamo 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 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)
12615
22615
32615
42615
52615
62615
72615
82615
92615
102615
112615
122615
132615
142615
152615
162615
172615
182615
192615
202615
212615
222615
232615
242615
252715
262715
272715
282714
292714
302714

Pénjamo 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
Jan24° / 121.810.98.7
Feb26° / 91.511.38.4
Mar29° / 11°101.411.97.3
Apr31° / 14°7212.55.6
May32° / 16°366.8134.6
Jun29° / 16°1321613.24.5
Jul27° / 15°16921.513.14.8
Aug27° / 15°13519.212.75.1
Sep26° / 15°12416.512.15.5
Oct27° / 13°437.411.57.0
Nov26° / 10°122.4118.3
Dec25° / 41.210.88.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% 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 64%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23565
33565
43565
53565
63565
73565
83565
93565
103565
113466
123664
133565
143565
153664
163763
173763
183763
193763
203763
213763
223763
233763
243862
253862
263961
274060
284060
294060
304159

Chance of precipitation in September

Any precipitation

Pénjamo gets around 124 mm of rain over 16.5 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 54% and peaks near 65% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
165
265
365
465
564
664
764
864
963
1062
1162
1261
1360
1458
1557
1656
1755
1853
1952
2051
2149
2247
2346
2444
2542
2641
2739
2838
2937
3036

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 47% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1145135
2145135
3145036
4144936
5154936
6154936
7154836
8164836
9164836
10164836
11174736
12174736
13184735
14184734
15194733
16204833
17214831
18224830
19234829
20244828
21264827
22284725
23304724
24324622
25344521
26364520
27384418
28394417
29414415
30424314

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:34 AM to 6:41 AM, and sunset from 6:59 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:346:59
212.46:356:58
312.46:356:57
412.46:356:56
512.36:356:55
612.36:356:54
712.36:366:53
812.36:366:52
912.36:366:51
1012.26:366:50
1112.26:376:50
1212.26:376:49
1312.26:376:48
1412.26:376:47
1512.16:386:46
1612.16:386:45
1712.16:386:44
1812.16:386:43
1912.16:386:42
2012.06:396:41
2112.06:396:40
2212.06:396:39
2312.06:396:38
2412.06:406:37
2511.96:406:36
2611.96:406:35
2711.96:406:34
2811.96:416:33
2911.96:416:32
3011.86:416:31

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.51 kWh/m².

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 7.48 kWh/m² in April across the year — September's 5.51 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
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 Pénjamo

In seasonPeak

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

Pénjamo'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 Pénjamo?

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

5.5
Sightseeing
8th-best month of the year
5.4
Beach & pool
10th-best month of the year

September is a reasonable time to visit Pénjamo for sightseeing.

What to pack for Pénjamo in September

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

In September, Pénjamo sees daytime highs around 26°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 17 days see rain.

rain gearlight clothessun protection

UV index in Pénjamo 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 Pénjamo peaks around June 14 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 highJun 14UV 14Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun14Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec7Very high

Air quality in Pénjamo 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 Pénjamo is worst in May — around 31 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (August, 16 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1031 µg/m³Aug 1316 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb20Moderate
Mar21Moderate
Apr31Moderate
May31Moderate
Jun17Moderate
Jul17Moderate
Aug16Moderate
Sep18Moderate
Oct16Moderate
Nov20Moderate
Dec28Moderate
Location & terrain

Where is Pénjamo?

Pénjamo sits at 20.4°N, 101.7°W, 1,780 m above sea level, in Mexico. The nearest listed city is Abasolo, 20 km away.

Topography around Pénjamo

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

Within 3 km, the terrain around Pénjamo has significant variations in elevation — a maximum elevation change of 506 m around an average of 1,814 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 822 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,787 m.

The land around Pénjamo is covered by cropland (30%), artificial surfaces (24%) and grassland (23%) within 3 km, cropland (40%), trees (23%) and grassland (21%) within 16 km, and cropland (41%) within 80 km.

3 km
506 m
16 km
822 m
80 km
1,787 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Abasolo 20 km · La Piedad de Cabadas 33 km · Puruándiro 44 km · Irapuato 47 km · Romita 54 km · Valle de Santiago 56 km · Salamanca 57 km · Yurécuaro 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 Pénjamo (20.4313°, -101.724°, elevation 1,780 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).