January weather forecast
Alwis Town, Sri Lanka

January is a hot winter month in Alwis Town, Sri Lanka, with an average temperature varying between 23.1°C (73.6°F) and 30.8°C (87.4°F).

Temperature

Alwis Town experiences a recorded average high-temperature of a tropical 30.8°C (87.4°F) in January, closely aligned with December's 29.9°C (85.8°F). The average temperature drops to a warm 23.1°C (73.6°F) during the night in the month of January.

Heat index

The heat index value during January is estimated at a sweltering 38°C (100.4°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Realize that the values for the heat index are set for shaded places and light winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

The months with the lowest humidity are January and February, with an average relative humidity of 74%.

Rainfall

The month with the least rainfall in Alwis Town is January, when the rain falls for 11.6 days and typically collects 40mm (1.57") of precipitation.

Daylight

In January, the average length of the day is 11h and 46min.
On the first day of the month, sunrise is at 06:21 and sunset at 18:05. On the last day of January, in Alwis Town, sunrise is at 06:29 and sunset at 18:18 +0530.

Sunshine

With an average of 9.1h of sunshine, January has the most sunshine of the year in Alwis Town, Sri Lanka.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Alwis Town, Sri Lanka. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 7 during January translates into the following directions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.