December weather forecast
San José de Sisa, Peru

The first month of the summer, December, is still a warm month in San José de Sisa, Peru, with an average temperature varying between 20°C (68°F) and 29.7°C (85.5°F).

Temperature

During December, San José de Sisa records an average high-temperature of a moderately hot 29.7°C (85.5°F), marking a slight divergence from November's 30.8°C (87.4°F). During December, San José de Sisa observes a consistent average nighttime temperature of 20°C (68°F).

Heat index

Throughout December, the heat index is estimated at a very hot 36°C (96.8°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild 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 'felt air temperature' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In San José de Sisa, the average relative humidity in December is 78%.

Rainfall

In December, in San José de Sisa, the rain falls for 22.2 days. Throughout December, 92mm (3.62") of precipitation is accumulated. Throughout the year, in San José de Sisa, there are 246.6 rainfall days, and 1162mm (45.75") of precipitation is accumulated.

Daylight

With an average of 12h and 30min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 05:41 and sunset at 18:10. On the last day of the month, sunrise is at 05:55 and sunset at 18:25 -05.

Sunshine

In San José de Sisa, the average sunshine in December is 9.1h.

UV index

The months with the highest UV index in San José de Sisa are January through December, with an average maximum UV index of 6. January through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: In December, a daily UV index of 6 turns into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.