Temperatures in September
It's warm in September in Oeiras with an average temperature of 27°C. Temperatures this month range from a low of 25°C to a high of 29°C. At night, you can expect temperatures between 17°C and 20°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Oeiras in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Oeiras with hot temperatures, averaging around 28°C during the day and nights close to 19°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers.
Mid-September
By mid-September, the average daytime temperature drops to around 27°C, with nights close to 19°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
Temperatures vary between day and night, so it’s smart to wear layers.
End of September
By the end of September, the average daytime temperature in Oeiras will be around 27°C, with nights close to 18°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine.
As it gets cooler in the evening, it’s best to wear layers.
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Precipitation in September
In September, there is an average of 25 mm of precipitation, spread over 4 days. The wind speed is around 4 Bft, mostly coming from the West.
The precipitation chance averages 14% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Oeiras. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Oeiras in September |
London | ||
|---|---|---|---|
 Average Temperature |
27°C | 20°C | |
 High Temp |
29°C | 22°C | |
| Low Temp |
25°C | 17°C | |
 Total Precipitation |
25 mm | 44 mm | |
| Rainy Days |
4 days | 8 days | |
August
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Oeiras?
Want nice weather? Then September is a great time to be in Oeiras. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Oeiras in September
With 39°C, Oeiras hit the highest temperature in the last 10 years in September 2016. The lowest daytime temperature in this month was 20°C in 2014. The extreme night temperatures ranged from a low of 13°C to a high of 24°C.
Check out the climate of Oeiras for all months and discover the best travel time
Curious about the climate in other parts of Portugal? Check out the weather and climate in places like Algarve, Lisbon, Albufeira, or have a look at other destinations in Portugal.
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Daily Temperature in September in Oeiras
This chart shows the average daily temperatures, both day and night, for each day in September in Oeiras, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Oeiras
The chart below shows the average daily precipitation in September for Oeiras, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 4 days of rain in Oeiras.
Daily UV Index in September in Oeiras
This chart shows the average daily UV index in September in Oeiras, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Oeiras Over the Years
This chart shows the average temperature in September in Oeiras, measured in degrees Celsius, over the past years.
Total Precipitation in September in Oeiras Over the Years
This chart shows the average precipitation in September in Oeiras, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Oeiras
Click on a specific day in September for detailed info on the typical weather on that day in Oeiras. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Oeiras
Have you been to Oeiras in September?
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Average Weather in Oeiras by Month
Click on a month below to see detailed weather info for Oeiras. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
