January weather forecast
San José de Sisa, Peru

January, like December, in San José de Sisa, Peru, is a moderately hot summer month, with an average temperature ranging between max 29.7°C (85.5°F) and min 19.7°C (67.5°F).

Temperature

January's onset corresponds to a marginal change in the average high-temperature to a still moderately hot 29.7°C (85.5°F), matching December's readings. During the month of January, the temperature generally drops to a low average of 19.7°C (67.5°F).

Heat index

The average heat index in January is estimated at a fiery hot 36°C (96.8°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Understanding the heat index involves considering values for shaded locales with light wind. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In January, the average relative humidity in San José de Sisa is 79%.

Rainfall

In San José de Sisa, in January, during 23.2 rainfall days, 100mm (3.94") of precipitation is typically accumulated. In San José de Sisa, during the entire year, the rain falls for 246.6 days and collects up to 1162mm (45.75") of precipitation.

Daylight

In San José de Sisa, the average length of the day in January is 12h and 28min.
On the first day of January in San José de Sisa, sunrise is at 05:55 and sunset at 18:25. On the last day of the month, sunrise is at 06:08 and sunset at 18:32 -05.

Sunshine

In January, the average sunshine in San José de Sisa is 7.9h.

UV index

January through December, with an average maximum UV index of 6, are months with the highest UV index in San José de Sisa. The months with the lowest UV index in San José de Sisa are January through December, with an average maximum UV index of 6. A UV Index 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 6 in January translates into these instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Boost your sun resistance with garments that are densely woven yet spacious.