Oeiras Weather in September

In Oeiras, September brings high daytime temperatures around 23°C (73°F), with nights cooling to 18°C (64°F). Some rainfall is to be expected.

Rainfall in Oeiras in September

Rain is expected on roughly 6 days, totalling around 31 mm (1.2 in) for the month. Rain is scarce this month and when it does fall, it tends to be light. Unlikely to disrupt plans significantly.

Temperature in Oeiras in September

If you're visiting Oeiras in September, expect perfect temperatures with highs of 23°C (73°F) and overnight lows of 18°C (64°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Oeiras in September

With approximately 278 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Oeiras.

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For a detailed overview over the year and the best time to visit Portugal, check out our Oeiras's climate page.

Oeiras Temperature in September

Min Temperature 18°C (64°F)  

Max Temperature 23°C (73°F)  

Chance of Rain 20%  

Precipitation 31 mm (1.2 in)  

Rainy days 6 days  

Humidity 75% *  

Sunshine 278 hours *  

Percentage Sunshine 75% *  

* Data from: Cascais, Portugal (9 KM, 5 Miles).

What to Wear in Oeiras in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Pack a light rain jacket or compact umbrella for occasional showers. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Oeiras in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

10/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Portugal, check out our Oeiras's climate page.

More climate data for Oeiras

Temperature Rainfall Sunshine Humidity

See the full Oeiras climate overview or explore weather in Portugal.