September weather forecast
Ostuacán, Mexico

The first month of the autumn, September, is still a hot month in Ostuacán, Mexico, with an average temperature varying between 31.7°C (89.1°F) and 22.6°C (72.7°F).

Temperature

The transition into September notes an average high-temperature of a still tropical 31.7°C (89.1°F), revealing a mild distinction from the 32.8°C (91°F) in August. In Ostuacán, the average temperature during the nights of September drops to an agreeable 22.6°C (72.7°F).

Heat index

The heat index for September is estimated at a life-threatening hot 46°C (114.8°F). Remain alert: Heat exhaustion and heat cramps are predicted. Extended effort can lead to heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gives an indication of how one might feel in terms of heat after considering humidity. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In September, the average relative humidity in Ostuacán is 87%.

Rainfall

In Ostuacán, in September, it is raining for 25.5 days, with typically 158mm (6.22") of accumulated precipitation. In Ostuacán, during the entire year, the rain falls for 217.5 days and collects up to 1264mm (49.76") of precipitation.

Daylight

The average length of the day in September is 12h and 14min.
On the first day of the month, sunrise is at 5:59 am and sunset at 6:26 pm. On the last day of September, sunrise is at 6:03 am and sunset at 6:02 pm CST.

Sunshine

The average sunshine in September in Ostuacán is 7.5h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.