The best times to visit Oeiras for ideal weather are
April 16th to July 29th
August 27th to November 18th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Oeiras Travel Guide
Other Oeiras Travel Info
Weather in Oeiras
Average temperatures in Oeiras vary somewhat. Considering humidity, temperatures feel very enjoyable all year with a fair chance of precipitation about half of the year. The area is more temperate than most — in the 66th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Oeiras, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 85.9°F (29.9°C) with temperatures rarely dropping below 66.5°F (19.2°C) at night.
Oeiras Temperatures (Fahrenheit)
Oeiras Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Oeiras Perceived Temperature (F)
Oeiras Perceived Temperature (C)
Average Oeiras Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Oeiras are July, August, and then June. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early July. For example, on the week of July 2nd there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid February with an average of 2 days of significant precipitation the week of February 12th.
When can you find snow in Oeiras? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Oeiras.
Snow on the Ground
The graph below shows the average snow on the ground in Oeiras (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Oeiras has some very humid months, with other comfortably humid months. The least humid month is August (53.1% relative humidity), and the most humid month is December (75.2%).
Wind in Oeiras is usually calm. The windiest month is July, followed by August and March. July’s average wind speed of around 7.5 knots (8.7 MPH or 14 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid May where average top sustained speeds reach 13.6 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Oeiras.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||6.2||Light breeze||10.6||Gentle breeze|
|Feb||6.8||Light breeze||11.8||Significant breeze|
|Mar||7.1||Gentle breeze||12||Gentle breeze|
|Apr||6.9||Light breeze||12||Significant breeze|
|May||7.1||Gentle breeze||12.3||Gentle breeze|
|Jun||7.1||Gentle breeze||12.4||Significant breeze|
|Jul||7.5||Gentle breeze||12.7||Gentle breeze|
|Aug||7.2||Gentle breeze||12.7||Significant breeze|
|Sep||6||Light breeze||11.3||Gentle breeze|
|Oct||6.2||Light breeze||11||Significant breeze|
|Nov||6||Light breeze||11||Gentle breeze|
|Dec||6.3||Light breeze||11.1||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Oeiras?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Portugal; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Aug 22, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Oeiras, Portugal is April, followed by January and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Oeiras in October. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Oeiras Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderate. Highs range from 78.4°F (25.8°C) and 63.1°F (17.3°C) with warmer temperatures in the later months. Rain is somewhat common with 4 to 6 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with 0 to 1 days of precipitation per month. June – August is fairly slow season for tourism in Oeiras, so lodging and other accommodations may cost slightly less.
Fall (September through November)
Fall daily highs range from 82°F (27.8°C) and 59.8°F (15.4°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 2 to 7 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is too cold this time of year in Oeiras to be enjoyable for warm weather travelers. The average high during this season is between 63.5°F (17.5°C) and 58.4°F (14.7°C). On average, it rains or snows a fair amount: 6 to 8 times per month. These times of year are the second busiest with tourists.