July weather forecast and climate
Dehiwala, Sri Lanka

July, the same as June, in Dehiwala, Sri Lanka, is another hot summer month, with average temperature ranging between max 30°C (86°F) and min 25°C (77°F).

Temperature

The coldest months are June through December, with an average high-temperature of 30°C (86°F).

Rainfall

In July, the rain falls for 11 days. Throughout July, 124mm (4.9") of precipitation is accumulated. In Dehiwala, during the entire year, the rain falls for 139 days and collects up to 2402mm (94.6") of precipitation.

Sea temperature

In Dehiwala, the average seawater temperature is 27.3°C (81.1°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

June and July, with an average of 12.5h of daylight, are months with the longest days in Dehiwala.

Sunshine

Months with the least sunshine in Dehiwala are May through October, with an average of 6h of sunshine.

UV index

Months with the highest UV index in Dehiwala, Sri Lanka, are February through October, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme threat to health from the exposure to the Sun's UV rays for average individuals.
The average daily UV index of 12 in July transform into the following instructions:
Practice all essential precautions. Protection against sun damage is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What are the coldest months in Dehiwala?

The coldest months in Dehiwala, Sri Lanka, are June through December, with an average high-temperature of 30°C (86°F).

What is the temperature in July in Dehiwala?

In Dehiwala, in July, the average high-temperature is 30°C (86°F), and the average low-temperature is 25°C (77°F).

How much does it rain in Dehiwala in July?

In July, in Dehiwala, the rain falls for 11 days. Throughout July, 124mm (4.9") of precipitation is accumulated.

What is the water temperature in July in Dehiwala?

In July, the average sea temperature in Dehiwala, Sri Lanka, is 27.3°C (81.1°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

When are the longest days in Dehiwala?

Months with the longest days in Dehiwala, Sri Lanka, are June and July, with an average of 12.5h of daylight.

How many hours of daylight does Dehiwala have in July?

The average length of the day in July in Dehiwala, Sri Lanka, is 12.5h.

What is the month with the least sunshine in Dehiwala?

Months with the least sunshine in Dehiwala, Sri Lanka, are May through October, with an average of 6h of sunshine.

How long on average sun shines in July in Dehiwala?

In July, the average sunshine is 6h.

What is the month with the highest UV index in Dehiwala?

February through October, with an average maximum UV index of 12, are months with the highest UV index in Dehiwala, Sri Lanka.

What is the UV index intensity in July in Dehiwala?

The average daily maximum UV index in July is 12. A UV Index value of 11, and more, symbolizes an extreme health threat from unsafe exposure to the Sun's UV rays.
Average temperature in July - Dehiwala, Sri Lanka
  • Average high temperature in July: 30°C

Warmest months (with the highest average high temperature) are March and April (32°C).
Months with the lowest average high temperature are June, July, August, September, October, November and December (30°C).

  • Average low temperature in July: 25°C

Months with the highest average low temperature are May, June, July, August and September (25°C).
Coldest months (with the lowest average low temperature) are January and December (22°C).

Average rainfall in July - Dehiwala, Sri Lanka
  • Average rainfall in July: 124mm

The wettest month (with the highest rainfall) is May (382mm).
The driest month (with the lowest rainfall) is January (55mm).

Average rainfall days in July - Dehiwala, Sri Lanka
  • Average rainfall days in July: 11 days

The month with the highest number of rainy days is October (16 days).
Months with the lowest number of rainy days are January and February (5 days).

Average sea temperature in July - Dehiwala, Sri Lanka
  • Average sea temperature in July: 27.3°C

The best month for swimming (with the highest average sea temperature) is April (29.6°C).
The coldest month (with the lowest average sea temperature) is August (27.2°C).

Average daylight in July / Average sunshine in July - Dehiwala, Sri Lanka
  • Average daylight in July: 12.5h

Months with the longest days are June and July (Average daylight: 12.5h).
The month with shortest days is December (Average daylight: 11.7h).

  • Average sunshine in July: 6h

Months with most sunshine are February and March (Average sunshine: 9h).
Months with least sunshine are May, June, July, August, September and October (Average sunshine: 6).

Average UV index in July - Dehiwala, Sri Lanka
  • Average UV index in July: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are January, November and December (UV index 11).

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