August weather forecast
Rathkarawwa, Sri Lanka

The last month of the summer, August, is another tropical month in Rathkarawwa, Sri Lanka, with an average temperature ranging between min 26.3°C (79.3°F) and max 30.4°C (86.7°F).

Temperature

Rathkarawwa records a slight change with August's average high-temperatures adjusting to a still tropical 30.4°C (86.7°F) from July's 30.7°C (87.3°F). An average temperature of 26.3°C (79.3°F) is logged during the nights of August, a small step down from daytime highs.

Heat index

The average heat index in August is calculated to be a torrid 37°C (98.6°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Remember that heat index calculations are made for conditions in the shade 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 'real feel' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In August, the average relative humidity is 75%.

Rainfall

In Rathkarawwa, Sri Lanka, in August, during 11 rainfall days, 30mm (1.18") of precipitation is typically accumulated. In Rathkarawwa, during the entire year, the rain falls for 192.9 days and collects up to 942mm (37.09") of precipitation.

Daylight

In Rathkarawwa, the average length of the day in August is 12h and 20min.
On the first day of August, sunrise is at 06:00 and sunset at 18:25. On the last day of the month, sunrise is at 05:59 and sunset at 18:14 +0530.

Sunshine

The average sunshine in August is 9.6h.

UV index

The months with the highest UV index are January through September, November and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 7 during August translates into these guidelines:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full 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.