July weather forecast
San Sebastián Tlacolula, Mexico

July, the same as June, in San Sebastián Tlacolula, Mexico, is a hot summer month, with an average temperature fluctuating between 21.3°C (70.3°F) and 31.8°C (89.2°F).

Temperature

The arrival of July denotes a barely perceptible change in the average high-temperatures to a still hot 31.8°C (89.2°F) from June's 33.2°C (91.8°F). In July, San Sebastián Tlacolula experiences a temperature dip to an average of 21.3°C (70.3°F) at night.

Heat index

Throughout July, the heat index is appraised at an extremely hot 43°C (109.4°F). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Given the heat index, its values are aligned with shaded sites and gentle winds. 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 'real feel' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In San Sebastián Tlacolula, the average relative humidity in July is 79%.

Rainfall

In San Sebastián Tlacolula, in July, it is raining for 27.2 days, with typically 153mm (6.02") of accumulated precipitation. In San Sebastián Tlacolula, Mexico, during the entire year, the rain falls for 209 days and collects up to 998mm (39.29") of precipitation.

Daylight

The average length of the day in July is 13h and 4min.
On the first day of the month, sunrise is at 5:56 am and sunset at 7:06 pm. On the last day of July, in San Sebastián Tlacolula, sunrise is at 6:05 am and sunset at 7:01 pm CST.

Sunshine

In July, the average sunshine is 9.8h.

UV index

March through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 7 in July translates into these instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.