July weather forecast
Lisbon, Portugal

July, like June, in Lisbon, Portugal, is another warm summer month, with an average temperature fluctuating between 28.2°C (82.8°F) and 18.2°C (64.8°F).

Temperature

In Lisbon, the average high-temperature in July is practically the same as in June - a still warm 28.2°C (82.8°F). In July, the average low-temperature is 18.2°C (64.8°F).

Rainfall

July is the month with the least rainfall in Lisbon. Rain falls for 2 days and accumulates 4mm (0.16") of precipitation.

Sea temperature

In July, the average sea temperature is 18.9°C (66°F).
Note: Swimming in 18.9°C (66°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

In Lisbon, Portugal, the average length of the day in July is 14h and 34min.
On the first day of July in Lisbon, sunrise is at 06:15 and sunset at 21:05. On the last day of the month, sunrise is at 06:36 and sunset at 20:49 WEST.

Sunshine

July and August, with an average of 11h of sunshine, are months with the most sunshine.

UV index

June and July, with an average maximum UV index of 9, are months with the highest UV index in Lisbon, Portugal. A UV Index estimate of 8 to 10 represents a very high health risk from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 9 in July transform into the following instructions:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 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. A wide-brim hat offers excellent sun protection for the 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. Prolonged stay under the direct sun should be avoided as much as possible, especially if a person burns easily. Sunscreen with a minimum 30 sun protection factor should always be used.