Chilapa de Álvarez weather in September

In September, Chilapa de Álvarez sees average daytime highs of 25°C and overnight lows near 17°C, with 367 mm of rain across 28.3 wet days and about 12.1 hours of daylight. It is the 12th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 2% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Chilapa de Álvarez's 12th-clearest and 12th-windiest month. For the whole year in context, see Chilapa de Álvarez's year-round climate.

Daytime high
25°
12th warmest
Overnight low
17°
11th coldest
Rainfall
367 mm
28.3 wet days
Daylight
12 h 06 min
6:28 AM – 6:34 PM
Cloud cover
86%
12th clearest
Wind
4 km/h
12th windiest
Solar energy
4.92 kWh/m²
Travel score
3.7
out of 10

Chilapa de Álvarez is municipal seat of Chilapa, State of Guerrero, 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 25°C through the month.

A typical September day in Chilapa de Álvarez reaches about 25°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 23°C and 27°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)
12517
22517
32517
42517
52517
62517
72517
82517
92517
102517
112517
122517
132517
142517
152517
162517
172517
182517
192517
202517
212517
222517
232517
242517
252517
262517
272517
282617
292617
302617

Chilapa de Álvarez weather by month

How September compares with the rest of the year at a glance. September is the 12th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 13°121.911.18.3
Feb28° / 13°91.411.48.0
Mar29° / 14°122.411.96.8
Apr30° / 15°244.712.45.7
May29° / 17°12015.712.84.8
Jun26° / 17°32726.5133.8
Jul26° / 17°34428.112.93.8
Aug26° / 17°37128.812.63.7
Sep25° / 17°36728.312.13.7
Oct26° / 16°18120.711.64.9
Nov26° / 14°508.611.27.1
Dec26° / 13°142.6118.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 6% of September, with mostly cloudy or overcast conditions the remaining 91%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1793
2793
3892
4892
5793
6793
7793
8793
9793
10793
11793
12793
13793
14892
15892
16892
17892
18892
19793
20793
21892
22892
23892
24991
251189
261189
271189
281387
291387
301585

Chance of precipitation in September

Any precipitation

Chilapa de Álvarez gets around 367 mm of rain over 28.3 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 93% and peaks near 94% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
194
294
394
494
594
694
794
894
994
1094
1194
1294
1394
1494
1594
1694
1794
1894
1994
2094
2194
2294
2393
2492
2592
2691
2790
2889
2988
3087

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 79% of days. Sticky, muggy-or-worse air turns up on roughly 20% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)
118019
218019
318019
418019
518019
618019
718019
818019
918019
1018019
1118019
1218019
1317920
1408020
1508020
1607921
1707921
1807921
1907822
2007822
2117722
2217722
2317722
2427721
2527721
2637621
2737720
2847620
2947719
3057619

Wind in September

Winds average 4 km/h in September, the calmest month.

Across September, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 6:26 AM to 6:30 AM, and sunset from 6:47 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:266:47
212.36:266:46
312.36:266:45
412.36:266:44
512.36:276:44
612.36:276:43
712.26:276:42
812.26:276:41
912.26:276:40
1012.26:276:39
1112.26:276:38
1212.26:286:37
1312.16:286:37
1412.16:286:36
1512.16:286:35
1612.16:286:34
1712.16:286:33
1812.16:286:32
1912.06:286:31
2012.06:296:30
2112.06:296:30
2212.06:296:29
2312.06:296:28
2412.06:296:27
2511.96:296:26
2611.96:306:25
2711.96:306:24
2811.96:306:23
2911.96:306:23
3011.96:306:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.92 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.92 kWh/m² to a high of 7.36 kWh/m² in April across the year — September's 4.92 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.8Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in September

Hazard calendar for Chilapa de Álvarez

In seasonPeak

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

Chilapa de Álvarez's monsoon runs June–October, 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 Chilapa de Álvarez?

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

3.7
Sightseeing
11th-best month of the year
3.5
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Chilapa de Álvarez.

What to pack for Chilapa de Álvarez in September

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

In September, Chilapa de Álvarez sees daytime highs around 25°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 28 days see rain.

rain gearlight clothessun protection

UV index in Chilapa de Álvarez 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 Chilapa de Álvarez peaks around April 10 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 10UV 14Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr14Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Chilapa de Álvarez 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 Chilapa de Álvarez is worst in May — around 37 µg/m³ PM2.5 (poor), about 3.8× the cleanest month (February, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateMay 1435 µg/m³Feb 1310 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb10Good
Mar13Moderate
Apr26Moderate
May37Poor
Jun16Moderate
Jul15Moderate
Aug14Moderate
Sep15Moderate
Oct18Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Chilapa de Álvarez?

Chilapa de Álvarez sits at 17.6°N, 99.2°W, 1,406 m above sea level, in Mexico. The nearest listed city is Tixtla de Guerrero, 24 km away.

Topography around Chilapa de Álvarez

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

Within 3 km, the terrain around Chilapa de Álvarez has significant variations in elevation — a maximum elevation change of 430 m around an average of 1,484 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,481 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,919 m.

The land around Chilapa de Álvarez is covered by grassland (32%) and shrubs (28%) within 3 km, trees (43%), grassland (26%) and shrubs (23%) within 16 km, and trees (54%) and shrubs (32%) within 80 km.

3 km
430 m
16 km
1,481 m
80 km
2,919 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Tixtla de Guerrero 24 km · Chilpancingo 35 km · Zumpango del Río 38 km · Tlapa de Comonfort 64 km · Ayutla de los Libres 71 km · Ciudad de Huitzuco 80 km · Iguala de la Independencia 92 km · Axochiapan 110 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 Chilapa de Álvarez (17.5992°, -99.1739°, elevation 1,406 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).