January weather forecast
Hirana, Sri Lanka

January in Hirana, Sri Lanka, is a tropical winter month, with an average temperature fluctuating between 23.4°C (74.1°F) and 30.3°C (86.5°F).

Temperature

January's arrival brings an average high-temperature of a hot 30.3°C (86.5°F), slightly deviating from December's 29.7°C (85.5°F). Hirana, during the month of January, experiences an average low-temperature of 23.4°C (74.1°F).

Heat index

The heat index value during January is calculated to be a very hot 37°C (98.6°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular significance for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

The months with the lowest humidity in Hirana are January and February, with an average relative humidity of 75%.

Rainfall

The month with the least rainfall in Hirana is January, when the rain falls for 8.9 days and typically collects 25mm (0.98") of precipitation.

Daylight

In January, the average length of the day in Hirana, Sri Lanka, is 11h and 47min.
On the first day of January, sunrise is at 06:21 and sunset at 18:05. On the last day of the month, sunrise is at 06:28 and sunset at 18:18 +0530.

Sunshine

With an average of 9.2h of sunshine, January has the most sunshine of the year.

UV index

January through April, July, September through December, with an average maximum UV index of 7, are months with the highest UV index in Hirana. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 7 in January leads to these guidelines:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.