Sesimbra Temperature by Month

The average annual maximum temperature in Sesimbra, Lisbon Region, Portugal is 20°C (68°F), with daytime highs ranging from 16°C (61°F) in January to 24°C (75°F) in August. This page covers monthly averages, day-night differences, and how Sesimbra compares to cities worldwide.

The moderate changes in the climate in Sesimbra ensure gradual weather shifts through each season. At night, temperatures drop to between 19°C (66°F) and 11°C (52°F) depending on the time of year.

The chart below illustrates the average maximum day and minimum night temperatures in Sesimbra by month:

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. August, the warmest month of the year, receives 350 hours of sunshine.

The chart below shows the average temperature throughout the year:

Sesimbra's average annual maximum temperature is 20°C (68°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Sesimbra's weather, including monthly rainfall, sunshine hours, and humidity, visit our Sesimbra climate page.