Ciudad Constitución weather in September

In September, Ciudad Constitución sees average daytime highs of 35°C and overnight lows near 24°C, with 46 mm of rain across 4.2 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 69% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Ciudad Constitución's 6th-clearest and 7th-windiest month. For the whole year in context, see Ciudad Constitución's year-round climate.

Daytime high
35°
3rd warmest
Overnight low
24°
12th coldest
Rainfall
46 mm
4.2 wet days
Daylight
12 h 06 min
6:17 AM – 6:25 PM
Cloud cover
30%
6th clearest
Wind
14 km/h
7th windiest
Solar energy
6.13 kWh/m²
Travel score
3.3
out of 10

Ciudad Constitución is municipal seat of Comondú, State of Baja California Sur, Mexico.

Founded
1953

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 35°C through the month.

A typical September day in Ciudad Constitución reaches about 35°C in the afternoon and slips back to 24°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 38°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13524
23524
33524
43524
53524
63524
73524
83524
93524
103524
113524
123524
133524
143524
153524
163524
173524
183424
193424
203424
213423
223423
233423
243423
253423
263423
273423
283423
293423
303422

How September really feels in Ciudad Constitución

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
4 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Ciudad Constitución weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 12°7110.68.6
Feb26° / 12°71.211.18.3
Mar27° / 13°30.411.88.4
Apr28° / 14°10.112.67.6
May30° / 15°00.113.27.1
Jun32° / 18°20.213.55.6
Jul35° / 22°30.613.43.5
Aug35° / 24°182.412.92.8
Sep35° / 24°464.212.23.3
Oct32° / 20°161.311.45.2
Nov29° / 16°12110.87.2
Dec26° / 12°101.410.58.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 19%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17129
27228
37327
47327
57525
67624
77624
87723
97723
107921
117921
128020
138020
148119
158119
168218
178317
188317
198317
208416
218416
228416
238515
248515
258515
268614
278713
288713
298911
308911

Chance of precipitation in September

Any precipitation

Ciudad Constitución gets around 46 mm of rain over 4.2 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 13% and peaks near 17% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
117
217
317
417
517
617
717
816
916
1016
1115
1215
1314
1413
1513
1612
1712
1812
1912
2011
2111
2211
2311
2411
2510
2610
2710
289
299
308

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 86% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10834499
20834499
308334910
408334810
508344811
608344711
708344611
808354611
908354511
1009364511
1109364410
1209364410
13110374310
1411037439
1511138429
1611138418
1711239408
1811339398
1911439387
2011539387
2121539377
2221639367
2321739357
2421839347
2521839338
2631939318
2732040308
2842140288
2942240267
3052341257

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 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 42 minutes over September. Sunrise moves from 6:11 AM to 6:22 AM, and sunset from 6:42 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:116:42
212.56:116:41
312.56:126:40
412.46:126:39
512.46:126:38
612.46:136:36
712.46:136:35
812.36:146:34
912.36:146:33
1012.36:146:32
1112.36:156:31
1212.26:156:30
1312.26:166:29
1412.26:166:28
1512.26:166:26
1612.16:176:25
1712.16:176:24
1812.16:176:23
1912.16:186:22
2012.06:186:21
2112.06:196:20
2212.06:196:19
2312.06:196:17
2411.96:206:16
2511.96:206:15
2611.96:216:14
2711.96:216:13
2811.86:216:12
2911.86:226:11
3011.86:226:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.13 kWh/m².

For context, solar energy here swings from a low near 4.19 kWh/m² to a high of 8.09 kWh/m² in May across the year — September's 6.13 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.0Bright
296.0Bright
306.0Bright
Planning a trip in September

Hazard calendar for Ciudad Constitución

In seasonPeak

In September, Ciudad Constitución sits inside its pacific hurricane season. The full year is below, with each hazard's peak months called out.

Ciudad Constitución sits in the eastern Pacific hurricane zone; the season peaks August–September.

Pacific hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Ciudad Constitución?

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

3.3
Sightseeing
11th-best month of the year
6.9
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Ciudad Constitución. The water and warmth also suit a beach or pool day.

What to pack for Ciudad Constitución in September

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

In September, Ciudad Constitución sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Ciudad Constitución in September

The nearest coast averages about 26°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 48 km away) is warmest in September at about 26°C and coldest in April near 18°C.

It's comfortable for a long swim from Jun 25 to Jan 19 — about 6.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan20Refreshing
Feb19Cool
Mar18Cool
Apr18Cool
May18Cool
Jun19Cool
Jul23Refreshing
Aug25Warm
Sep26Warm
Oct25Warm
Nov23Refreshing
Dec22Refreshing

UV index in Ciudad Constitución in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ciudad Constitución peaks around July 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 14UV 13Dec 20UV 5
UV index (midday)Level
Jan6High
Feb7High
Mar9Very high
Apr11Extreme
May11Extreme
Jun12Extreme
Jul13Extreme
Aug11Extreme
Sep10Extreme
Oct8Very high
Nov6High
Dec5Moderate
Location & terrain

Where is Ciudad Constitución?

Ciudad Constitución sits at 25.0°N, 111.7°W, 53 m above sea level, in Mexico. The nearest listed city is La Paz, 169 km away.

Todos SantosLos MochisHuatabampoColonia del SolJuan José RíosSan José del CaboCabo San Lucas

Topography around Ciudad Constitución

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

Within 3 km, the terrain around Ciudad Constitución has only modest variations in elevation — a maximum elevation change of 14 m around an average of 52 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 64 m; within 80 km, large variations in elevation — a maximum elevation change of 1,115 m.

The land around Ciudad Constitución is covered by bare terrain (51%) and artificial surfaces (33%) within 3 km, bare terrain (52%) and shrubs (35%) within 16 km, and shrubs (58%) and water (24%) within 80 km.

3 km
14 m
16 km
64 m
80 km
1,115 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: La Paz 169 km · Todos Santos 229 km · Los Mochis 281 km · Huatabampo 284 km · Colonia del Sol 294 km · Juan José Ríos 296 km · San José del Cabo 297 km · Cabo San Lucas 297 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 Ciudad Constitución (25.0321°, -111.6626°, elevation 53 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).