July weather forecast
Jaffna, Sri Lanka

Weather in July

July, the same as June, is a moderately hot summer month in Jaffna, Sri Lanka, with average temperature ranging between min 27.9°C (82.2°F) and max 29°C (84.2°F).

Temperature

In Jaffna, the average high-temperature in July is almost the same as in June - a still warm 29°C (84.2°F). The average low-temperature, in July, is 27.9°C (82.2°F).

Heat index

The average heat index is appraised at a tropical 34.3°C (93.7°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. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, wind, pregnancy). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.

Humidity

In July, the average relative humidity in Jaffna is 78%.

Rainfall

In Jaffna, Sri Lanka, during July, the rain falls for 10.3 days and regularly aggregates up to 30mm (1.18") of precipitation. In Jaffna, Sri Lanka, during the entire year, the rain falls for 148.6 days and collects up to 769mm (30.28") of precipitation.

Sea temperature

In Jaffna, in July, the average water temperature is 29.3°C (84.7°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

In July, the average length of the day in Jaffna, Sri Lanka, is 12.6h.

Sunshine

In July, the average sunshine in Jaffna is 11.3h.

UV index

Months with the highest UV index in Jaffna are January through October and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 7 in July interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in July in Jaffna?

The average high-temperature, in July, in Jaffna, is 29°C (84.2°F), while the average low-temperature is 27.9°C (82.2°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in July is appraised at 34.3°C (93.7°F).

What is the average humidity in July in Jaffna?

In Jaffna, the average relative humidity in July is 78%.

How much does it rain in Jaffna in July?

In July, in Jaffna, Sri Lanka, the rain falls for 10.3 days. Throughout July, 30mm (1.18") of precipitation is accumulated.

What is the sea water temperature in July in Jaffna?

In Jaffna, Sri Lanka, in July, the average water temperature is 29.3°C (84.7°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.

How many hours of daylight does Jaffna have in July?

In Jaffna, Sri Lanka, the average length of the day in July is 12.6h.

How long on average sun shines in July in Jaffna?

In Jaffna, Sri Lanka, the average sunshine in July is 11.3h.

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

Months with the highest UV index are January through October and December, with an average maximum UV index of 7.

What is the UV index reading in July in Jaffna?

In Jaffna, the average daily maximum UV index in July is 7. A UV Index reading of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in July
Jaffna, Sri Lanka

Average temperature in July - Jaffna, Sri Lanka
  • Average high temperature in July: 29°C

The warmest month (with the highest average high temperature) is April (30.4°C).
The month with the lowest average high temperature is January (26.8°C).

  • Average low temperature in July: 27.9°C

The month with the highest average low temperature is May (29°C).
The coldest month (with the lowest average low temperature) is January (25.5°C).

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Average pressure in July
Jaffna, Sri Lanka

Average pressure in July - Jaffna, Sri Lanka
  • Average pressure in July: 1006.2mbar

The month with the highest atmospheric pressure is January (1012.5mbar).
The month with the lowest atmospheric pressure is June (1005.9mbar).

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Average wind speed in July
Jaffna, Sri Lanka

Average wind speed in July - Jaffna, Sri Lanka
  • Average wind speed in July: 29.6km/h

The windiest month (with the highest average wind speed) is June (33.8km/h).
The calmest months (with the lowest average wind speed) are March and April (16.7km/h).

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Average humidity in July
Jaffna, Sri Lanka

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

Months with the highest relative humidity are May, August and September (79%).
The month with the lowest relative humidity is March (75%).

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Average rainfall in July
Jaffna, Sri Lanka

Average rainfall in July - Jaffna, Sri Lanka
  • Average rainfall in July: 30mm

The wettest month (with the highest rainfall) is October (191mm).
The driest month (with the least rainfall) is March (13mm).

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Average rainfall days in July
Jaffna, Sri Lanka

Average rainfall days in July - Jaffna, Sri Lanka
  • Average rainfall days in July: 10.3 days

The month with the highest number of rainy days is October (22.6 days).
The month with the least rainy days is March (5.8 days).

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Average sea temperature in July
Jaffna, Sri Lanka

Average sea temperature in July - Jaffna, Sri Lanka
  • Average sea temperature in July: 29.3°C

The best month for swimming (with the highest average sea temperature) is April (30.1°C).
The coldest month (with the lowest average sea temperature) is January (26.8°C).

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Average daylight in July /
Average sunshine in July
Jaffna, Sri Lanka

Average daylight in July / Average sunshine in July - Jaffna, Sri Lanka
  • Average daylight in July: 12.6h

The month with the longest days is June (Average daylight: 12.7h).
Months with the shortest days are January and December (Average daylight: 11.6h).

  • Average sunshine in July: 11.3h

The month with the most sunshine is June (Average sunshine: 11.6h).
The month with the least sunshine is December (Average sunshine: 5.5h).

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Average sunshine days in July
Jaffna, Sri Lanka

Average sunshine days in July - Jaffna, Sri Lanka
  • Average sunshine days in July: 19.8 days

The month with the most sunshine days is March (23.9 days).
The month with the least sunshine days is November (6.3 days).

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Average UV index in July
Jaffna, Sri Lanka

Average UV index in July - Jaffna, Sri Lanka
  • Average UV index in July: 7

Months with the highest UV index are January, February, March, April, May, June, July, August, September, October and December (UV index 7).
The month with the lowest UV index is November (UV index 6).

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Average cloud cover in July
Jaffna, Sri Lanka

Average cloud cover in July - Jaffna, Sri Lanka
  • Average cloud cover in July: 29

The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 16).

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Average visibility in July
Jaffna, Sri Lanka

Average visibility in July - Jaffna, Sri Lanka
  • Average visibility in July: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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