Colombo
Sri Lanka
Long-term weather forecast
Long-term weather forecast

July weather forecast and climate
Colombo, Sri Lanka

Statues on the Seema Malaka Temple in Colombo, Sri Lanka, overlooking the Beira Lake, and a view of the tall buildings of Colombo
Statues on the Seema Malaka Temple in Colombo, Sri Lanka, overlooking the Beira Lake, and a view of the tall buildings of Colombo
Julio, like Junio, is a hot summer month in Colombo, Sri Lanka, with temperature in the range of an average high of 30°C (86°F) and an average low of 25.2°C (77.4°F).

Temperature

The coldest months are Julio, Agosto and Octubre, with an average high-temperature of 30°C (86°F).

Heat index

In Julio, the average heat index is estimated at a sweltering 37.1°C (98.8°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the 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 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, pregnancy, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Julio, the average relative humidity is 78%.

Rainfall

In Colombo, during 12 rainfall days, 121.9mm (4.8") of precipitation is typically accumulated. Throughout the year, in Colombo, there are 145 rainfall days, and 2523.7mm (99.36") of precipitation is accumulated.

Sea temperature

In Colombo, Sri Lanka, the average water temperature is 27.3°C (81.1°F).
Note: 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

Months with the longest days in Colombo are Junio and Julio, with an average of 12.5h of daylight.

Sunshine

In Julio, the average sunshine in Colombo is 6.5h.

UV index

Febrero through Octubre, with an average maximum UV index of 12, are months with the highest UV index. A UV Index reading of 11, and higher, represents an excessive health risk from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 12 in Julio interpret into the following advice:
Practice all essential precautions. Protection against sun damage is crucial. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the coldest month in Colombo?

Julio, Agosto and Octubre, with an average high-temperature of 30°C (86°F), are the coldest months.

What is the temperature in Julio in Colombo?

In Colombo, in Julio, the average high-temperature is 30°C (86°F), and the average low-temperature is 25.2°C (77.4°F). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that combines air temperature and relative humidity, in Julio is evaluated at 37.1°C (98.8°F).

What is the average humidity in Julio in Colombo?

In Julio, the average relative humidity in Colombo, Sri Lanka, is 78%.

How much does it rain in Colombo in Julio?

In Colombo, in Julio, it is raining for 12 days, with typically 121.9mm (4.8") of accumulated precipitation.

How warm is the water in Julio in Colombo?

In Colombo, Sri Lanka, in Julio, the average water temperature is 27.3°C (81.1°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

When are the longest days in Colombo?

Months with the longest days in Colombo are Junio and Julio, with an average of 12.5h of daylight.

How many hours of daylight does Colombo have in Julio?

In Colombo, Sri Lanka, the average length of the day in Julio is 12.5h.

How many hours of sunshine does Colombo have in Julio?

The average sunshine in Julio in Colombo is 6.5h.

When is the highest UV index in Colombo?

Febrero through Octubre, with an average maximum UV index of 12, are months with the highest UV index in Colombo.

What is the UV index reading in Julio in Colombo?

In Julio, the average daily maximum UV index in Colombo is 12. A UV Index of 11, and more, symbolizes an excessive health risk from unprotected exposure to the UV radiation.
Average temperature in July - Colombo, Sri Lanka
  • Average high temperature in July: 30°C

The warmest month (with the highest average high temperature) is April (31.8°C).
Months with the lowest average high temperature are July, August and October (30°C).

  • Average low temperature in July: 25.2°C

Months with the highest average low temperature are May and June (25.5°C).
The coldest month (with the lowest average low temperature) is January (22.3°C).

Average humidity in July - Colombo, Sri Lanka
  • Average humidity in July: 78%

The month with the highest relative humidity is June (79%).
Months with the lowest relative humidity are January and February (69%).

Average rainfall in July - Colombo, Sri Lanka
  • Average rainfall in July: 121.9mm

The wettest month (with the highest rainfall) is November (414.4mm).
The driest month (with the lowest rainfall) is January (58.2mm).

Average rainfall days in July - Colombo, Sri Lanka
  • Average rainfall days in July: 12 days

The month with the highest number of rainy days is October (17 days).
Months with the lowest number of rainy days are January and February (5 days).

Average sea temperature in July - Colombo, 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 - Colombo, 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: 6.5h

The month with most sunshine is March (Average sunshine: 8.9h).
The month with least sunshine is September (Average sunshine: 6.3h).

Average UV index in July - Colombo, 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).