September weather forecast
San Joaquin, Bolivia

September ushers in subtle signs of the impending rainy season in San Joaquin. Cloud cover starts to increase and the winds blow a bit stronger. The overall atmospheric pressure drops noticeably, hinting at the imminent change in the weather pattern. Gradual increase in rainfall contribute to a gentle rise in humidity. By this month, the rainfall has increased to 21mm (0.83"), almost double compared to August.

Temperature

September temperatures in San Joaquin tend to peak at an average high of 35.5°C (95.9°F) and dip to a low of 24.2°C (75.6°F).

Heat index

September's heat index is calculated to be a blistering 40°C (104°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. 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 largely significant for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in September is 46%.

Rainfall

In San Joaquin, Bolivia, in September, during 9.9 rainfall days, 21mm (0.83") of precipitation is typically accumulated. Throughout the year, in San Joaquin, Bolivia, there are 215.7 rainfall days, and 1318mm (51.89") of precipitation is accumulated.

Daylight

In September, the average length of the day in San Joaquin is 12h and 2min.
On the first day of the month, sunrise is at 06:22 and sunset at 18:14. On the last day of September, in San Joaquin, sunrise is at 06:01 and sunset at 18:14 -04.

Sunshine

The average sunshine in September is 9.4h.

UV index

With an average maximum UV index of 8, September is the month with the highest UV index in San Joaquin. A UV Index estimate of 8 to 10 represents a very high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A typical high UV index of 8 in September suggests the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.