Visibility: 6 mi. High Temp: 83 °F. July is the hottest month in Lisbon with an average temperature of 23.5°C (74°F) and the coldest is January at 11°C (52°F) with the most daily sunshine hours at 11 in July. Overview of Lisbon Weather.

Low Temp: 47 °F. Pressure: 30.08 "Hg.

Lisbon has some very humid months, with other comfortably humid months. The coldest month is January with an average maximum temperature of 15°C (46°F).

The least humid month is August (53.1% relative humidity), and the most humid month is December (75.2%). The water temperature in Lisbon (Atlantic Ocean) is on an annual average at about 16.80°C | 62.24°F. Mean Temp: 63 °F.

December is the most wet month. There is a variation of mean monthly temperatures of 11.4 °C (20.5°F) which is a low range. Annual Weather Averages Near Lisbon. Averages are for Lisbon Portela Airport, which is 3 miles from Lisbon. The warmest month is July with an average maximum temperature of 28°C (82°F). Based on weather reports collected during 1985–2015.

Lisbon, Lisboa, Portugal - Monthly weather averages including average high and low Temperature, Precipitation, Pressure, Wind Charts to assist you in planning your travel, holiday or an outdoor activity at Lisbon… Showing: All Year Climate & Weather Averages in Lisbon.

Average monthly temperatures in Lisbon (degrees centigrade and fahrenheit) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec °C: 14.7: 15.7: 17.7: 19.2: 21.9: 24.9: 27.6 Precipitation: 0.97" Humidity: 74%.

Lisbon is a year-round destination, with a Mediterranean climate and mild temperatures. July is the driest month. The least humid month is August (53.1% relative humidity), and the most humid month is December (75.2%). Lisbon has dry periods in June, July and August. The month-by-month guides feature additional information about the weather, what to pack, and things to do in Lisbon each month. The wettest month is November with an average of 127.6mm of rain.

Weather.com brings you the most accurate monthly weather forecast for with average/record and high/low temperatures, precipitation and more. The average annual temperature in Lisbon, Portugal is very mild at 16.8 degrees Celsius (62.2 degrees Fahrenheit). This month should be avoided if you are not a big fan of rain. The best month to swim in the sea is in September when the average sea temperature is 19.9°C (68°F). Dew Point: 53 °F. Wind: 9 mph.

In September, the highest water temperature is reached with a monthly average of 18.90°C | 66.02°F.