December weather forecast
Tecomán, Mexico

December, the first month of the winter in Tecomán, is still a tropical month, with an average temperature ranging between max 30.2°C (86.4°F) and min 19.9°C (67.8°F).

Temperature

December commences with an average high-temperature of a still tropical 30.2°C (86.4°F), showing little deviation from November's 30.9°C (87.6°F). Tecomán witnesses a consistent average low-temperature of 19.9°C (67.8°F) throughout December.

Heat index

The heat index value during December is computed to be a fiery hot 35°C (95°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In Tecomán, the average relative humidity in December is 67%.

Rainfall

In Tecomán, in December, during 2 rainfall days, 5mm (0.2") of precipitation is typically accumulated. In Tecomán, during the entire year, the rain falls for 95.4 days and collects up to 425mm (16.73") of precipitation.

Daylight

December has the shortest days of the year, with an average of 11h and 0min of daylight.
On the first day of the month, sunrise is at 7:12 am and sunset at 6:16 pm. On the last day of December, in Tecomán, sunrise is at 7:28 am and sunset at 6:29 pm CST.

Sunshine

The months with the most sunshine are March, April and December, with an average of 9.9h of sunshine.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 6 during December translates into the following guidance:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.