October weather forecast
Merida, Mexico

The month of October brings a reprieve from the heavy rainfall, with a decline to an average of 65mm (2.56"). The reduction in rainfall paves the way for somewhat drier days. The temperature dips moderately, making the weather slightly cooler. This sets the stage for the city’s transition into the colder months. The slightly cooler climate and reduced rainfall make October a suitable time to visit Merida.

Temperature

Merida sees the arrival of October with an average high-temperature of a still hot 31.5°C (88.7°F), indicating a subtle variation from September. An average temperature of 22.3°C (72.1°F) is recorded during the nights in October.

Heat index

October's average heat index is estimated at a blisteringly hot 42°C (107.6°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Understand that the heat index values take into account shaded locations and mild winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

The months with the highest humidity are September and October, with an average relative humidity of 78%.

Rainfall

In October, the rain falls for 19.6 days. Throughout October, 65mm (2.56") of precipitation is accumulated. In Merida, during the entire year, the rain falls for 167.3 days and collects up to 536mm (21.1") of precipitation.

Daylight

The average length of the day in October is 11h and 40min.
On the first day of the month, sunrise is at 5:49 am and sunset at 5:45 pm. On the last day of October, sunrise is at 6:00 am and sunset at 5:23 pm CST.

Sunshine

In Merida, the average sunshine in October is 7.8h.

UV index

The months with the highest UV index are February through October, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum UV index of 7 in October translates into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.