July weather forecast
Thessaloniki, Greece

July is a hot summer month in Thessaloniki, Greece, with an average temperature fluctuating between 31.8°C (89.2°F) and 20.1°C (68.2°F).

Temperature

July is the warmest month, with an average high-temperature of 31.8°C (89.2°F) and an average low-temperature of 20.1°C (68.2°F).

Heat index

The average heat index in July is evaluated at a sweltering 35°C (95°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', 'apparent temperature', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, wind, metabolic differences). 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. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in July is 53%.

Rainfall

In Thessaloniki, during 10.3 rainfall days, 22mm (0.87") of precipitation is typically accumulated. In Thessaloniki, during the entire year, the rain falls for 133.1 days and collects up to 436mm (17.17") of precipitation.

Snowfall

April through October are months without snowfall in Thessaloniki.

Sea temperature

July is the month with the warmest seawater, with an average sea temperature of 26.2°C (79.2°F).
Note: 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.

Daylight

The average length of the day in July is 14h and 45min.
On the first day of the month, sunrise is at 06:00 and sunset at 21:03. On the last day of July, sunrise is at 06:23 and sunset at 20:45 EEST.

Sunshine

The months with the most sunshine are July and August, with an average of 11.9h of sunshine.

UV index

July and August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 7 in July transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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. 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.