January weather forecast
Chilaw, Sri Lanka

January in Chilaw, Sri Lanka, is a tropical winter month, with an average temperature fluctuating between 22.8°C (73°F) and 30.8°C (87.4°F).

Temperature

During January, the average high-temperature is a tropical 30.8°C (87.4°F), maintaining a close resemblance to that of the preceding month. In Chilaw, an average low-temperature of 22.8°C (73°F) is recorded during January nights.

Heat index

January's average heat index is appraised at a sweltering 38°C (100.4°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is found by incorporating humidity levels into the air temperature measurement. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. 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 essentially critical for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

The months with the lowest humidity in Chilaw are January and February, with an average relative humidity of 73%.

Rainfall

January is the month with the least rainfall. Rain falls for 9.7 days and accumulates 29mm (1.14") of precipitation.

Sea temperature

In January, the average sea temperature in Chilaw is 27.4°C (81.3°F).
Note: For engaging in any water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) are viewed as outstanding and exceptionally pleasing for prolonged durations.

Daylight

The average length of the day in January is 11h and 44min.
On the first day of the month, sunrise is at 06:23 and sunset at 18:04. On the last day of January, in Chilaw, Sri Lanka, sunrise is at 06:30 and sunset at 18:18 +0530.

Sunshine

January through April, with an average of 9.2h of sunshine, are months with the most sunshine in Chilaw, 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 Chilaw, Sri Lanka. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In January, a daily UV index of 7 turns into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Always opt for UVA and UVB-resistant sunglasses on radiant days. Alert! Sand and water increase UV exposure due to their reflective properties.