September weather forecast
Opodepe, Mexico

The first month of the autumn, September, is also a fiery hot month in Opodepe, Mexico, with an average temperature fluctuating between 26.3°C (79.3°F) and 35.8°C (96.4°F).

Temperature

September's beginning signals an average high-temperature of a still sweltering 35.8°C (96.4°F), barely different from August's 37.3°C (99.1°F). September nights in Opodepe experience a consistent temperature drop to a warm 26.3°C (79.3°F).

Heat index

For September, the heat index is calculated to be 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.
Consider that heat index readings are for situations in the shade and light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The average relative humidity in September is 49%.

Rainfall

In Opodepe, during September, the rain falls for 11.1 days and regularly aggregates up to 55mm (2.17") of precipitation. Throughout the year, there are 68.8 rainfall days, and 258mm (10.16") of precipitation is accumulated.

Daylight

In Opodepe, the average length of the day in September is 12h and 20min.
On the first day of the month, sunrise is at 6:00 am and sunset at 6:44 pm. On the last day of September, sunrise is at 6:15 am and sunset at 6:08 pm MST.

Sunshine

In Opodepe, the average sunshine in September is 9.4h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 8. A UV Index reading of 8 to 10 represents a very high threat to health from exposure to the Sun's UV radiation for the average person.
Note: In September, a daily UV index of 8 turns into the following recommendations:
Protection should always be a priority. Skin and eyes are vulnerable without it. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Tightly woven clothing, when worn loosely, shields effectively against the Sun.