Cozumel in Summer
In summer (June, July and August), Cozumel sees average daytime highs around 28°C and overnight lows near 27°C, with 357 mm of rain over about 48 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Across summer, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 40% of the time across summer, and the air most often feels miserable.
Summer is Cozumel's weakest season of the year to visit on our travel score. Cozumel has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Cozumel's year-round climate.
- Avg daytime high
- 28°C
- warmest season of the year
- Avg overnight low
- 27°C
- Rainfall
- 357 mm
- 48 wet days
- Avg wind
- 18 km/h
- Travel score
- 5.1
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Cozumel in Summer
Across summer, daytime highs hold fairly steady around 28°C.
A typical summer day in Cozumel reaches about 28°C and drops to 27°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Cozumel
Once humidity and wind are folded in, summer brings about 91 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Cozumel weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 25° / 24° | 64 | 11.6 | 10.9 | 6.9 |
| Feb | 26° / 24° | 28 | 6.8 | 11.3 | 7.6 |
| Mar | 26° / 24° | 26 | 5.7 | 11.9 | 7.8 |
| Apr | 27° / 25° | 29 | 5.8 | 12.5 | 7.6 |
| May | 28° / 26° | 85 | 11 | 13 | 6.5 |
| Jun | 28° / 27° | 168 | 17.5 | 13.2 | 5.0 |
| Jul | 29° / 27° | 82 | 14.2 | 13.1 | 5.3 |
| Aug | 29° / 27° | 107 | 16.6 | 12.7 | 5.0 |
| Sep | 29° / 27° | 180 | 21.5 | 12.1 | 4.2 |
| Oct | 28° / 26° | 214 | 19.8 | 11.5 | 5.0 |
| Nov | 27° / 25° | 103 | 12.5 | 11 | 6.4 |
| Dec | 26° / 24° | 66 | 11.9 | 10.8 | 6.7 |
Cloud cover in Summer
The sky is clear or mostly clear about 40% of the time across summer.
Chance of precipitation in Summer
Cozumel gets around 357 mm of rain over 48 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 18 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 06 min in early June to 12 h 24 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.2 kWh/m².
Hazard calendar for Cozumel
In summer, Cozumel overlaps its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.
Cozumel sits in the Atlantic hurricane belt; the season peaks August–October.
Cozumel's rainy season runs August–November, when most of the year's rain falls.
Is summer a good time to visit Cozumel?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Cozumel for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Cozumel in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Cozumel sees daytime highs around 28°C and nights near 27°C. Pack light clothes, rain gear and sun protection. Worth having: a windbreaker. About 48 days see rain.
Sea temperature near Cozumel in Summer
The nearest coast averages about 29°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 16 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 27 | 27 | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 27 | Warm |
| May | 28 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in Cozumel in Summer
Clear-sky midday UV across summer averages 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 Cozumel peaks around April 18 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 7 | 10 | 11 | 12 | 12 | 12 | 11 | 12 | 11 | 10 | 7 | 6 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 7 | Very high |
| Feb | 10 | Very high |
| Mar | 11 | Extreme |
| Apr | 12 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very high |
| Nov | 7 | Very high |
| Dec | 6 | High |
Air quality in Cozumel in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Cozumel is worst in June — around 26 µg/m³ PM2.5 (moderate), about 4.3× the cleanest month (November, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 7 | 7 | 8 | 11 | 15 | 26 | 24 | 19 | 13 | 9 | 6 | 6 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 7 | Good |
| Mar | 8 | Good |
| Apr | 11 | Good |
| May | 15 | Moderate |
| Jun | 26 | Moderate |
| Jul | 24 | Moderate |
| Aug | 19 | Moderate |
| Sep | 13 | Moderate |
| Oct | 9 | Good |
| Nov | 6 | Good |
| Dec | 6 | Good |
Where is Cozumel?
Cozumel sits at 20.5°N, 86.9°W, 7 m above sea level, in Mexico. The nearest listed city is Playa del Carmen, 20 km away.
Topography around Cozumel
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cozumel.
Within 3 km, the terrain around Cozumel has only modest variations in elevation — a maximum elevation change of 13 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 22 m; within 80 km, only modest variations in elevation — a maximum elevation change of 35 m.
The land around Cozumel is covered by trees (37%), artificial surfaces (30%) and water (22%) within 3 km, water (57%) and trees (38%) within 16 km, and water (53%) and trees (42%) within 80 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
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 Cozumel (20.5004°, -86.9427°, elevation 7 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.