January weather forecast
Kelanimulla, Sri Lanka

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

Temperature

During January, Kelanimulla records an average high-temperature of a hot 30.8°C (87.4°F), marking a slight divergence from December's 29.9°C (85.8°F). In January, Kelanimulla records an average nighttime temperature of 23.1°C (73.6°F).

Heat index

In January, the average heat index is appraised at a sweltering 38°C (100.4°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. 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 hold great significance to children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
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. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

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 Kelanimulla 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, sunrise is at 06:28 and sunset at 18:18 +0530.

Sunshine

January has the most sunshine of the year, with an average of 9.1h of sunshine.

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. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: An average UV index of 7 in January transforms into this advice:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.