January weather forecast
Cozumel, Mexico

The start of the year in Cozumel, Mexico is characterized by a gentle rise in temperatures from the cooler winter months. Moderate humidity and an increase in rainfall contribute to a balmy climate. Daylight lasts slightly over 11 hours, providing ample time for outdoor activities. A UV index of 7 indicates a need for precautions against sun damage especially during midday. Besides, January stands apart due to extremely high total rainfall, where it reaches up to 81mm.

Temperature

Temperatures reach their minimum during January and December, recording an average high-temperature of 28.6°C.

Heat index

The heat index in January is evaluated at a tropical 34°C. Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.

Humidity

In Cozumel, the average relative humidity in January is 82%.

Rainfall

In Cozumel, in January, it is raining for 8.7 days, with typically 81mm of accumulated precipitation. Throughout the year, there are 119.9 rainfall days, and 1490mm of precipitation is accumulated.

Sea temperature

In Cozumel, the average seawater temperature in January is 27°C.
Note: Swimming, diving, and other water endeavors at temperatures between 25°C and 29°C are considered enjoyable and satisfying for extended periods without discomfort.

Daylight

In January, the average length of the day in Cozumel is 11h and 4min.
On the first day of the month, sunrise is at 7:23 am and sunset at 6:18 pm. On the last day of January, sunrise is at 7:23 am and sunset at 6:38 pm EST.

Sunshine

In Cozumel, the average sunshine in January is 6.4h.

UV index

January and December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily maximum UV index of 7 in January translates into the following instructions:
Inhibit overexposure. Warding off sun damage is of utmost importance. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Beware! Reflecting off water and sand, UV rays are much stronger.