temperature averages portugal
1 Lisbon, Portugal is at 38 43'N, 9 9'W, 95 m (312 ft). 2  See map. 3  Lisbon has a hot mediterranean/ dry-summer subtropical climate (K ppen-Geiger classification: Csa) that is mild with moderate seasonality. During summer average high temperatures are 26.7Â°C (80.1Â°F) and average low temperatures are 16.9Â°C (62.4Â°F). 2  Come autumn/ fall temperatures decrease achieving average highs of 22.2Â°C (72Â°F) during the day and lows of 14.3Â°C (57.7Â°F) generally shortly after sunrise.