Miahuatlán de Porfirio Díaz weather in September

In September, Miahuatlán de Porfirio Díaz sees average daytime highs of 23°C and overnight lows near 14°C, with 611 mm of rain across 26 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels comfortable.

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 Miahuatlán de Porfirio Díaz's 12th-clearest and 10th-windiest month. For the whole year in context, see Miahuatlán de Porfirio Díaz's year-round climate.

Daytime high
23°
10th warmest
Overnight low
14°
10th coldest
Rainfall
611 mm
26 wet days
Daylight
12 h 06 min
6:18 AM – 6:23 PM
Cloud cover
88%
12th clearest
Wind
5 km/h
10th windiest
Solar energy
4.78 kWh/m²
Travel score
4.0
out of 10

Miahuatlán de Porfirio Díaz is municipal seat of Miahuatlán, State of Oaxaca, 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 23°C through the month.

A typical September day in Miahuatlán de Porfirio Díaz reaches about 23°C in the afternoon and slips back to 14°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 24°C. Set against its neighbours, September runs on par with August and on par with October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12314
22314
32314
42314
52314
62314
72314
82314
92314
102314
112314
122314
132314
142314
152314
162314
172314
182314
192314
202314
212214
222214
232214
242214
252214
262214
272214
282214
292214
302214

Miahuatlán de Porfirio Díaz weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 10°102.611.18.4
Feb24° / 10°123.211.58.6
Mar25° / 12°427.211.97.8
Apr25° / 13°10812.812.46.5
May25° / 14°31221.312.85.2
Jun23° / 14°62825.7134.1
Jul23° / 14°53923.712.94.5
Aug23° / 14°56225.412.54.2
Sep23° / 14°6112612.14.0
Oct23° / 13°25316.511.65.6
Nov23° / 11°435.611.27.7
Dec22° / 10°112.2118.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% 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 (%)
1892
2892
3892
4793
5793
6793
7793
8793
9793
10793
11793
12793
13793
14892
15892
16892
17892
18991
19991
20991
21991
22991
23991
24991
251189
261189
271288
281288
291486
301585

Chance of precipitation in September

Any precipitation

Miahuatlán de Porfirio Díaz gets around 611 mm of rain over 26 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 85% and peaks near 89% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
187
287
387
488
588
689
789
889
989
1089
1189
1289
1388
1488
1587
1687
1787
1886
1986
2085
2184
2284
2383
2482
2581
2680
2779
2878
2977
3076

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 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
177716
277716
377716
467717
567717
667717
767717
867717
967717
1067717
1167717
1267618
1367618
1467618
1567519
1667519
1767519
1867519
1967519
2067519
2167618
2277518
2387517
2487517
2597516
26117316
27127315
28137215
29147115
30157114

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 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 6:16 AM to 6:20 AM, and sunset from 6:36 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:166:36
212.36:176:35
312.36:176:34
412.36:176:33
512.36:176:33
612.26:176:32
712.26:176:31
812.26:176:30
912.26:176:29
1012.26:176:28
1112.26:176:28
1212.26:186:27
1312.16:186:26
1412.16:186:25
1512.16:186:24
1612.16:186:23
1712.16:186:23
1812.16:186:22
1912.06:186:21
2012.06:186:20
2112.06:186:19
2212.06:196:18
2312.06:196:18
2412.06:196:17
2511.96:196:16
2611.96:196:15
2711.96:196:14
2811.96:196:13
2911.96:196:13
3011.96:206:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.78 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.78 kWh/m² to a high of 7.13 kWh/m² in April across the year — September's 4.78 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.6Bright
274.6Bright
284.6Bright
294.7Bright
304.7Bright
Planning a trip in September

Hazard calendar for Miahuatlán de Porfirio Díaz

In seasonPeak

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

Miahuatlán de Porfirio Díaz's monsoon runs May–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 Miahuatlán de Porfirio Díaz?

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

4.0
Sightseeing
12th-best month of the year
3.0
Beach & pool
12th-best month of the year

September is a reasonable time to visit Miahuatlán de Porfirio Díaz for sightseeing.

What to pack for Miahuatlán de Porfirio Díaz in September

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

In September, Miahuatlán de Porfirio Díaz sees daytime highs around 23°C and nights near 14°C. Pack rain gear. Worth having: light clothes and sun protection. About 26 days see rain.

rain gearlight clothessun protection

UV index in Miahuatlán de Porfirio Díaz in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Miahuatlán de Porfirio Díaz peaks around April 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 13UV 15Dec 15UV 9
UV index (midday)Level
Jan10Extreme
Feb13Extreme
Mar14Extreme
Apr15Extreme
May13Extreme
Jun14Extreme
Jul13Extreme
Aug14Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Miahuatlán de Porfirio Díaz 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 Miahuatlán de Porfirio Díaz is worst in May — around 27 µg/m³ PM2.5 (moderate), about 3.8× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1626 µg/m³Jan 137 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar10Good
Apr19Moderate
May27Moderate
Jun17Moderate
Jul20Moderate
Aug16Moderate
Sep15Moderate
Oct12Good
Nov9Good
Dec8Good
Location & terrain

Where is Miahuatlán de Porfirio Díaz?

Miahuatlán de Porfirio Díaz sits at 16.3°N, 96.6°W, 1,552 m above sea level, in Mexico. The nearest listed city is Ocotlán de Morelos, 52 km away.

Topography around Miahuatlán de Porfirio Díaz

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Miahuatlán de Porfirio Díaz.

Within 3 km, the terrain around Miahuatlán de Porfirio Díaz has only modest variations in elevation — a maximum elevation change of 163 m around an average of 1,578 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,441 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,707 m.

The land around Miahuatlán de Porfirio Díaz is covered by grassland (33%), cropland (28%) and artificial surfaces (22%) within 3 km, trees (33%), grassland (29%) and shrubs (27%) within 16 km, and trees (62%) within 80 km.

3 km
163 m
16 km
1,441 m
80 km
3,707 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ocotlán de Morelos 52 km · Puerto Escondido 72 km · San Antonio de la Cal 79 km · Santa Cruz Xoxocotlán 79 km · Crucecita 79 km · Oaxaca 82 km · Santa María Atzompa 88 km · Santo Domingo Tehuantepec 145 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 Miahuatlán de Porfirio Díaz (16.329°, -96.5961°, elevation 1,552 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).