July weather forecast
Dehiwala, Sri Lanka

July enters into Dehiwala, Sri Lanka, with an overarching reduction in daily rainfall. The city's summer climate characterizes this month with moderate warmth and high humidity. Transitioning from June, July experiences a decrease in maximum rainfall and temperature, thus indicating a shift in weather dynamics. Despite the changes, July's meteorological records mark 217mm (8.54") of rainfall, making it the third wettest month in Dehiwala. The residents ready themselves to shift into August, which typically features a slight increase in rainfall accompanied by a marginal drop in temperature.

Temperature

July in Dehiwala welcomes an average high-temperature of a still moderately hot 28.8°C (83.8°F), not much different from the preceding month. July nights in Dehiwala, Sri Lanka, register a minor temperature decline, steadying at a still moderately hot 25.6°C (78.1°F).

Heat index

In July, the heat index is estimated at a fiery hot 35°C (95°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. 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. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

June through August, with an average relative humidity of 83%, are the most humid months in Dehiwala.

Rainfall

In Dehiwala, Sri Lanka, in July, it is raining for 28 days, with typically 217mm (8.54") of accumulated precipitation. Throughout the year, in Dehiwala, there are 285.6 rainfall days, and 2201mm (86.65") of precipitation is accumulated.

Sea temperature

In Dehiwala, Sri Lanka, the average seawater temperature in July is 27.3°C (81.1°F).
Note: Water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are pleasurable, without feeling uncomfortable even during extended periods.

Daylight

In Dehiwala, Sri Lanka, the average length of the day in July is 12h and 29min.
On the first day of July in Dehiwala, sunrise is at 05:59 and sunset at 18:29. On the last day of the month, sunrise is at 06:04 and sunset at 18:29 +0530.

Sunshine

In Dehiwala, the average sunshine in July is 7.8h.

UV index

January through April, June, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Dehiwala. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index, 7 in July, converts into the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Always opt for UVA and UVB-resistant sunglasses on radiant days. Warning! The Sun's UV rays intensify with reflections from sand and water.