January weather forecast
Hulangamuwa, Sri Lanka

January, the same as December, is another warm winter month in Hulangamuwa, Sri Lanka, with temperature in the range of an average high of 29.3°C (84.7°F) and an average low of 19°C (66.2°F).

Temperature

Hulangamuwa's average high-temperature marks a still warm 29.3°C (84.7°F) with the advent of January, closely mirroring that of the preceding month. During the January nights, an average temperature of 19°C (66.2°F) is observed.

Heat index

The heat index value for January is calculated to be a very hot 35°C (95°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are quite important for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

In Hulangamuwa, the average relative humidity in January is 79%.

Rainfall

In Hulangamuwa, during January, the rain falls for 14 days and regularly aggregates up to 34mm (1.34") of precipitation. In Hulangamuwa, Sri Lanka, during the entire year, the rain falls for 218.8 days and collects up to 1175mm (46.26") of precipitation.

Daylight

In Hulangamuwa, the average length of the day in January is 11h and 45min.
On the first day of the month, sunrise is at 06:19 and sunset at 18:01. On the last day of January, sunrise is at 06:26 and sunset at 18:15 +0530.

Sunshine

The average sunshine in January in Hulangamuwa is 8.4h.

UV index

The months with the lowest UV index in Hulangamuwa are January, February, October through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 6 during January leads to these instructions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.