August weather forecast
Dehiwala, Sri Lanka

August in Dehiwala underlines a distinct precipitation pattern while retaining the city's moderately warm temperature. The differences between July and August aren't drastic in terms of temperature, though the city witnesses a distinct climb in rainfall levels. Among these weather parameters, August establishes itself with an enticing 252mm (9.92") of rainfall. Nearing the end of August, locals look forward to the tapering-off rain levels as they transition into September's more temperate conditions.

Temperature

Temperature readings reach their annual highs in August, averaging 28.7°C (83.7°F) and a minimum average of 25.5°C (77.9°F).

Heat index

In August, the average heat index is estimated at a very hot 35°C (95°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

The months with the highest humidity are June through August, with an average relative humidity of 83%.

Rainfall

In Dehiwala, in August, during 27.2 rainfall days, 252mm (9.92") of precipitation is typically accumulated. In Dehiwala, during the entire year, the rain falls for 285.6 days and collects up to 2201mm (86.65") of precipitation.

Sea temperature

August is the month with the coldest seawater, with an average sea temperature of 27.2°C (81°F).
Note: Water surface temperatures from 25°C (77°F) to 29°C (84.2°F) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.

Daylight

The average length of the day in August in Dehiwala, Sri Lanka, is 12h and 20min.
On the first day of the month, sunrise is at 06:04 and sunset at 18:29. On the last day of August, in Dehiwala, sunrise is at 06:03 and sunset at 18:18 +0530.

Sunshine

In August, the average sunshine in Dehiwala is 7.2h.

UV index

The months with the lowest UV index in Dehiwala, Sri Lanka, are May, August and October, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index, 6 during August, leads to the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.