January weather forecast
Kalawana, Sri Lanka

January, the same as December, is a moderately hot winter month in Kalawana, Sri Lanka, with an average temperature varying between 18.8°C (65.8°F) and 29.3°C (84.7°F).

Temperature

Transitioning into January, Kalawana experiences an average high-temperature of a still moderately hot 29.3°C (84.7°F), marking a minor shift from the preceding month. In the month of January, Kalawana witnesses a consistent average low-temperature of 18.8°C (65.8°F).

Heat index

January's mean heat index is estimated at a sweltering 36°C (96.8°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

The months with the lowest humidity are January and February, with an average relative humidity of 80%.

Rainfall

The month with the least rainfall is January, when the rain falls for 18.9 days and typically collects 85mm (3.35") of precipitation.

Daylight

In Kalawana, the average length of the day in January is 11h and 47min.
On the first day of the month, sunrise is at 06:19 and sunset at 18:04. On the last day of January, sunrise is at 06:26 and sunset at 18:17 +0530.

Sunshine

In Kalawana, the average sunshine in January is 8.3h.

UV index

The months with the highest UV index are January through August, November and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily high UV index of 6 in January translates into this advice:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.