January weather forecast
Mount Lavinia, Sri Lanka

January is a tropical winter month in Mount Lavinia, Sri Lanka, with an average temperature fluctuating between 23.3°C (73.9°F) and 30.3°C (86.5°F).

Temperature

The arrival of January brings an average high-temperature of a hot 30.3°C (86.5°F), subtly diverging from December's 29.7°C (85.5°F). Mount Lavinia experiences an average temperature drop to a moderately hot 23.3°C (73.9°F) during January nights.

Heat index

January's mean heat index is appraised at a fiery hot 37°C (98.6°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

With an average relative humidity of 74%, January is the least humid month.

Rainfall

The month with the least rainfall in Mount Lavinia is January, when the rain falls for 12.7 days and typically collects 44mm (1.73") of precipitation.

Daylight

In January, the average length of the day is 11h and 47min.
On the first day of the month, sunrise is at 06:21 and sunset at 18:05. On the last day of January, 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 in Mount Lavinia.

UV index

The months with the highest UV index are January through April, June, July, September, November and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index, 7 in January, converts into the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.