September weather forecast
Celestún, Mexico

The first month of the autumn, September, is also a hot month in Celestún, Mexico, with an average temperature ranging between min 25.3°C (77.5°F) and max 30.7°C (87.3°F).

Temperature

With September's arrival, Celestún notes an average high-temperature of a still tropical 30.7°C (87.3°F), closely following the trend of the preceding month. Celestún's nights in September experience an average temperature drop to a warm 25.3°C (77.5°F).

Heat index

The average heat index in September is appraised at a torrid 39°C (102.2°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

September is the most humid month, with an average relative humidity of 78%.

Rainfall

In September, in Celestún, the rain falls for 22.7 days. Throughout September, 91mm (3.58") of precipitation is accumulated. In Celestún, during the entire year, the rain falls for 154.1 days and collects up to 532mm (20.94") of precipitation.

Sea temperature

With an average sea temperature of 29.3°C (84.7°F), September is the month with the warmest seawater.
Note: Water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm, making water activities enjoyable for prolonged periods without any uncomfortable sensations.

Daylight

In September, the average length of the day is 12h and 15min.
On the first day of September in Celestún, sunrise is at 5:45 am and sunset at 6:17 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 5:50 pm CST.

Sunshine

The average sunshine in September is 10.6h.

UV index

March through October, with an average maximum UV index of 7, are months with the highest UV index in Celestún. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily high UV index of 7 during September translates into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take caution! The UV rays from the Sun gain strength from sand and water reflections.