Tulum weather in September

In September, Tulum sees average daytime highs of 30°C and overnight lows near 26°C, with 182 mm of rain across 23.4 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 26% of the time in September, and the air most often feels miserable.

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 Tulum's 12th-clearest and 12th-windiest month. For the whole year in context, see Tulum's year-round climate.

Daytime high
30°
3rd warmest
Overnight low
26°
9th coldest
Rainfall
182 mm
23.4 wet days
Daylight
12 h 06 min
5:41 AM – 5:48 PM
Cloud cover
64%
12th clearest
Wind
12 km/h
12th windiest
Solar energy
5.29 kWh/m²
Travel score
3.5
out of 10

Tulum is municipal seat of Tulum, State of Quintana Roo, Mexico.

Founded
1900

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 30°C through the month.

A typical September day in Tulum reaches about 30°C in the afternoon and slips back to 26°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13026
23026
33026
43026
53026
63026
73026
83026
93026
103026
113026
123026
133026
143026
153026
163026
173026
183026
193026
203025
213025
223025
233025
242925
252925
262925
272925
282925
292925
302925

How September really feels in Tulum

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
heat index over the day's high
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.

Tulum weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 22°4610.810.96.8
Feb27° / 22°246.811.37.3
Mar27° / 23°296.411.97.4
Apr28° / 24°306.812.46.6
May29° / 25°8813.212.95.2
Jun29° / 26°18219.313.24.2
Jul30° / 26°9316.413.14.4
Aug30° / 26°12018.812.74.1
Sep30° / 26°18223.412.13.5
Oct29° / 25°18619.711.54.4
Nov28° / 23°7511.6116.2
Dec27° / 22°4910.810.86.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24753
34654
44555
54456
64456
74456
84456
94555
104654
114456
124456
134555
144456
154357
164456
174357
184258
194258
204258
214159
224159
234159
244159
254060
263961
274060
283961
293961
303862

Chance of precipitation in September

Any precipitation

Tulum gets around 182 mm of rain over 23.4 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 77% and peaks near 82% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
171
272
372
473
573
674
774
874
974
1075
1175
1275
1376
1476
1577
1677
1778
1879
1980
2080
2181
2281
2382
2482
2582
2682
2781
2881
2980
3080

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
101288
201288
301288
401288
501387
601387
701387
801387
901387
1001486
1101486
1201486
1301585
1401585
1501684
1601684
1701684
1801783
1901783
2001783
2101882
2201882
2301981
2402080
2512178
2612178
2712277
2812376
2922375
3022474

Wind in September

Winds average 12 km/h in September, the calmest month.

Across September, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

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 5:37 AM to 5:44 AM, and sunset from 6:02 PM to 5:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:376:02
212.45:386:01
312.45:386:00
412.35:385:59
512.35:385:58
612.35:395:57
712.35:395:56
812.35:395:55
912.35:395:54
1012.25:395:53
1112.25:405:52
1212.25:405:51
1312.25:405:50
1412.25:405:50
1512.15:415:49
1612.15:415:48
1712.15:415:47
1812.15:415:46
1912.15:415:45
2012.05:425:44
2112.05:425:43
2212.05:425:42
2312.05:425:41
2412.05:435:40
2511.95:435:39
2611.95:435:38
2711.95:435:37
2811.95:445:36
2911.95:445:35
3011.85:445:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.29 kWh/m².

For context, solar energy here swings from a low near 3.8 kWh/m² to a high of 6.35 kWh/m² in July across the year — September's 5.29 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
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.3Bright
165.3Bright
175.3Bright
185.2Bright
195.2Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.9Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Tulum

In seasonPeak

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

Tulum sits in the Atlantic hurricane belt; the season peaks August–October.

Tulum's rainy season runs May–October, when most of the year's rain falls.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Tulum?

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

3.5
Sightseeing
12th-best month of the year
4.8
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Tulum.

What to pack for Tulum in September

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

In September, Tulum sees daytime highs around 30°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near Tulum in September

The nearest coast averages about 29°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 13 km away) is warmest in September at about 29°C and coldest in February near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr27Warm
May28Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Tulum in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tulum peaks around June 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighJun 17UV 12Dec 15UV 6
UV index (midday)Level
Jan7Very high
Feb10Very high
Mar11Extreme
Apr12Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct10Very high
Nov7High
Dec6High

Air quality in Tulum 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 Tulum is worst in June — around 26 µg/m³ PM2.5 (moderate), about 3.9× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2326 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar9Good
Apr13Moderate
May17Moderate
Jun26Moderate
Jul26Moderate
Aug20Moderate
Sep14Moderate
Oct10Good
Nov7Good
Dec7Good
Location & terrain

Where is Tulum?

Tulum sits at 20.2°N, 87.5°W, 5 m above sea level, in Mexico. The nearest listed city is Playa del Carmen, 61 km away.

Topography around Tulum

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

Within 3 km, the terrain around Tulum has only modest variations in elevation — a maximum elevation change of 19 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 31 m; within 80 km, only modest variations in elevation — a maximum elevation change of 43 m.

The land around Tulum is covered by trees (74%) within 3 km, trees (56%) and water (37%) within 16 km, and trees (60%) and water (36%) within 80 km.

3 km
19 m
16 km
31 m
80 km
43 m
treesgrasslandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Playa del Carmen 61 km · Cozumel 63 km · Felipe Carrillo Puerto 93 km · Valladolid 93 km · Cancun 125 km · Chichen Itza 126 km · Tizimín 126 km · Isla Mujeres 137 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 Tulum (20.2117°, -87.4633°, elevation 5 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. 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).