May Weather in Sintra, Portugal

Last updated: February 24, 2025

May weather in Sintra, Portugal offers a delightful blend of warmth and mildness, making it an ideal month to explore this enchanting locale. With maximum temperatures reaching up to 24°C (76°F) and an average of 16°C (61°F), visitors can enjoy comfortable daytime conditions. The nights are cooler, dipping to a minimum of 11°C (53°F), perfect for cozy evenings. While the month sees an average precipitation of 33 mm (1.3 in) over just three days, the humidity levels hover around 70%, adding a refreshing touch to the air. Whether you're strolling through lush gardens or visiting historic sites, May presents an inviting atmosphere in Sintra.

May Temperature in Sintra

May in Sintra, Portugal, marks a delightful transition into warmer weather, with temperatures showing a notable increase from the previous months. The minimum temperature climbs to a comfortable 11°C (53°F), while the average reaches 16°C (61°F), and the maximum can soar to 24°C (76°F). This trend illustrates a shift towards a more inviting climate, perfect for exploring the region's lush parks and stunning palaces. As winter fades and spring flourishes, residents and visitors alike can enjoy the mild yet invigorating atmosphere, making May an ideal month for outdoor activities in this picturesque part of Portugal.

May Weather in Sintra: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Sintra, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec555657586163646465646058
Data source: Temperature data for Sintra generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Sintra

May in Sintra, Portugal, marks a shift towards drier conditions as the region basks in the early warmth of spring. With only 33 mm (1.3 in) of precipitation accumulating over just 3 days, this month stands in stark contrast to the preceding months, which saw significantly higher rainfall totals. The decline in both precipitation amount and rainy days—dropping from April’s 71 mm over 11 days—foreshadows the onset of summer. This trend highlights Sintra’s transition into the drier months of June and July, where rainfall becomes increasingly scarce, making May an ideal time for outdoor exploration amidst the lush landscapes and blooming flora.

May Precipitation Trends in Sintra

The chart displays monthly precipitation patterns in Sintra, with values for each month alongside May's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec4259647133123432538973
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Sintra

As spring gives way to summer, May in Sintra, Portugal, sees a continuation of mild humidity levels, maintaining a comfortable 70%. This marks a subtle shift from the wetter months of winter and early spring, where humidity levels hover around the mid-80s to low 70s. With temperatures starting to rise, May's relatively stable humidity sets the stage for enjoyable outdoor activities, contrasting sharply with the peak humidity experienced in the late fall and winter. As the season progresses into June, a gradual decline emerges, dipping to 63%, signifying the onset of a warmer, drier summer. This enchanting rhythm of humidity reflects Sintra's unique climate, inviting visitors to explore its lush landscapes with a refreshing breeze.

May Average Humidity in Sintra

This chart illustrates the average monthly humidity levels in Sintra, with May's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how May's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec85%75%72%70%70%63%60%60%68%74%83%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Sintra

As May unfolds in Sintra, Portugal, the UV Index reaches an impressive 10, categorizing the sun’s rays as very high and demanding caution for outdoor enthusiasts. Following the trend from preceding months, the potential for sunburn persists with a burn time of just 15 minutes under these intense rays. This escalation from April's already high index of 9 emphasizes the importance of proactive sun protection strategies, especially as the onset of summer approaches. With UV levels peaking in June at 11, the advice remains: stay vigilant and informed about UV exposure. For detailed updates on daily conditions, check out Sintra UV Index.

Maximum UV Index Levels in Sintra for May

The chart shows the monthly maximum UV Index (UVI) for Sintra in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Sintra May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

May Sunshine in Sintra

In May, Sintra, Portugal basks in an impressive 405 hours of sunshine, marking a delightful peak in the spring season. This vibrant month captivates visitors with its lush landscapes and blooming gardens, as the days grow noticeably longer and warmer. Following an upward trend that begins in the dreary depths of winter, May sunshine continues the pattern established since January, where only 183 hours of sunlight greeted the year. As we move through the months, the increase is steady, culminating in the breathtaking brightness of late spring, setting the stage for the summer months ahead. This delightful ambiance not only enhances Sintra's picturesque views but also invites exploration of its rich history and stunning architecture under the warm embrace of the sun.

Monthly Sunshine Duration in Sintra: May Highlighted

The May sunshine duration represents the total number of hours Sintra experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec183h231h307h351h405h409h420h395h348h313h236h224h
Data source: Sintra May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sintra During May

May in Sintra, Portugal, brings a favorable 57% chance of sunny weather, marking a delightful transition from the cooler months. As spring blooms, the likelihood of sun increases significantly compared to April's 41%, showcasing a clear trend toward brighter days. This upward trajectory continues into the summer, with June reaching 65% and July peaking at 69%. As the temperatures rise and outdoor activities beckon, May emerges as a lovely prelude to the sunny season, promising a blend of mild warmth and picturesque skies. Whether you’re strolling through historic streets or exploring lush landscapes, this month offers an appealing balance of sun-kissed days to enjoy the beauty of Sintra.

Percentage of Sunny Days in May in Sintra

The chart illustrates the percentage of sunny days in Sintra throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Sintra experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec45%24%60%41%57%65%69%66%66%55%65%39%
Data source: Sintra May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sintra in May

As spring transitions into summer, Sintra, Portugal basks in increasing daylight, with May offering about 14 hours of sunshine—an inviting boost from the 13 hours experienced in April. This gradual ascent in daylight hours signals the arrival of longer, warmer days that characterize the vibrant months ahead. The trend continues into June and July, where daylight remains at its peak of 14 hours, allowing both locals and visitors ample opportunity to explore Sintra's stunning architecture and lush landscapes. As autumn approaches, the daylight begins to wane again, tapering to 12 hours in September and continuing to decrease until December. This beautiful rhythm of daylight throughout the year enhances Sintra’s charm, making it a year-round destination.

Average Daylight Hours in Sintra for May

The chart illustrates the variation in daylight duration in Sintra throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 46m10h 44m11h 58m13h 14m14h 17m14h 49m14h 32m13h 36m12h 23m11h 8m10h 2m9h 28m
Data source: Sintra daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Sintra

In May, Sintra, Portugal, experiences a noticeable increase in wind speed, averaging 7.3 m/s (16 mph), which is among the highest this year. This month marks a transition from the gentler breezes of April at 4.9 m/s (11 mph), indicating a shift toward a more lively atmosphere as summer approaches. Coinciding with this uptick, June mirrors May's winds, maintaining the breezy conditions that have become characteristic of the early summer months. As the year progresses, the wind speeds generally moderate into the fall, highlighting May's position as a key moment of refreshment in Sintra's climatological rhythm.

Average May Wind Speed in Sintra

The chart displays monthly wind speed patterns in Sintra, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec6.96.96.04.97.3 m/s7.37.26.45.45.16.56.7
Data source: Sintra May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Sintra Compares to Other Months

The weather in Sintra changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Sintra and find detailed weather information for every month.

In comparing the weather of May and January, May generally offers warmer temperatures with a minimum of 11°C (53°F) and an average of 16°C (61°F), peaking at 24°C (76°F). In contrast, January temperatures are cooler, ranging from a minimum of 7°C (45°F) to a maximum of 18°C (64°F), with an average of 13°C (56°F). May also boasts lower precipitation at 33 mm (1.3 in) over just 3 days, while January experiences more rain, totaling 42 mm (1.7 in) spread across 7 days. Additionally, May has a humidity level of 70%, compared to 85% in January, making it feel drier and more comfortable. For more specific details about January weather, you can check Sintra weather in January.

In comparing the weather of May and February, we see a noticeable difference in temperatures and precipitation. May generally features warmer conditions, with average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 24°C (76°F), while February has cooler averages, with minimum temperatures of 9°C (48°F) and a maximum of 17°C (63°F). Additionally, May experiences less rainfall, with only 33 mm (1.3 in) over about 3 days, compared to February's 59 mm (2.3 in) spread across 8 days. Humidity levels are slightly lower in May at 70%, whereas February maintains a higher humidity of 75%. For a more detailed look at February weather, you can check Sintra weather in February.

When comparing the weather in May and March, it’s clear that May brings warmer temperatures, with a minimum of 11°C (53°F) and an average of 16°C (61°F), compared to March's minimum of 9°C (49°F) and an average of 14°C (57°F). The maximum temperature in May reaches up to 24°C (76°F), making it significantly warmer than March's maximum of 19°C (66°F). Additionally, May experiences less precipitation, with only 33 mm (1.3 in) over 3 days, while March sees a heftier 64 mm (2.5 in) spread over 8 days. Humidity levels are fairly similar, hovering around 70% in May and 72% in March. For more detailed insights, you can check out Sintra weather in March.

When comparing the weather in April and May, it is clear that May tends to be warmer and drier. In May, temperatures range from a minimum of 11°C (53°F) to a maximum of 24°C (76°F), with an average of 16°C (61°F). This is an increase from April, where the temperatures range from 10°C (50°F) to 21°C (71°F), with an average of 14°C (58°F). Additionally, May experiences significantly less precipitation, with only 33 mm (1.3 in) over 3 days, compared to April's 71 mm (2.8 in) over 11 days. Both months maintain a consistent humidity level of 70%. For a more detailed comparison, you can check Sintra weather in April.

In comparing the weather between May and June, May tends to be slightly warmer, with average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 24°C (76°F). It also experiences higher precipitation, averaging 33 mm (1.3 in) over three days, coupled with a humidity level of 70%. In contrast, June sees a minimal increase in minimum temperature to 14°C (58°F) and a slight decrease in maximum temperature to 22°C (72°F), with average humidity dropping to 63%. Rainfall is significantly less in June, with only 12 mm (0.5 in) spread over two days. For a deeper insight into June's weather specifics, you can check Sintra weather in June.

May and July present contrasting weather conditions, with May typically enjoying warmer temperatures. In May, temperatures range from a minimum of 11°C (53°F) to a maximum of 24°C (76°F), and the month sees an average temperature of 16°C (61°F). It also experiences moderate rainfall, with 33 mm (1.3 in) of precipitation over three days and a humidity level of 70%. In contrast, July offers milder temperatures, with a minimum of 16°C (60°F) and a maximum of only 21°C (70°F), averaging at 18°C (64°F). Notably, July is much drier, recording only 3 mm (0.1 in) of precipitation across zero rainy days and a lower humidity of 60%. For more details about the weather in July, you can visit Sintra weather in July.

In May, the weather is generally mild with temperatures ranging from a minimum of 11°C (53°F) to a maximum of 24°C (76°F). The average temperature is around 16°C (61°F), accompanied by a moderate level of humidity at 70% and occasional rainfall, totaling 33 mm over about 3 days. In contrast, August offers a warmer and drier climate with temperatures ranging from 16°C (61°F) to a maximum of 23°C (74°F), while the average temperature is slightly higher at 18°C (65°F). Humidity decreases to 60%, and precipitation is minimal, totaling just 4 mm in 1 day. For more details, you can check Sintra weather in August.

May and September offer distinct weather experiences, with May generally featuring warmer temperatures, averaging around 16°C (61°F) and peaking at 24°C (76°F). In contrast, September, while still mild, has a slightly cooler average temperature of 18°C (65°F), with a maximum of 23°C (74°F). Both months experience similar precipitation levels, with May receiving 33 mm (1.3 in) over about three days, while September sees slightly less at 32 mm (1.2 in) over just two days. Humidity is relatively consistent, at 70% in May and slightly lower at 67% in September. For more detailed insights into the weather during this time, you can check Sintra weather in September.

May and October offer distinct weather characteristics, making each month unique. In May, temperatures range from a minimum of 11°C (53°F) to a maximum of 24°C (76°F), with an average of 16°C (61°F) and relatively low precipitation of 33 mm (1.3 in) over just 3 days. Humidity is comfortable at 70%. Conversely, October sees slightly cooler temperatures, with averages of 18°C (64°F) and a maximum of 23°C (74°F), while the minimum remains similar at 11°C (52°F). However, this month experiences increased precipitation, totaling 53 mm (2.1 in) over 6 days, alongside a higher humidity level of 74%. For more details on October weather specifics, check out Sintra weather in October.

May and November present distinct weather characteristics, despite their similar average temperatures. In May, temperatures range from a minimum of 11°C (53°F) to a pleasant maximum of 24°C (76°F), accompanied by relatively low precipitation of 33 mm (1.3 in) over just three days. In contrast, November experiences cooler maximum temperatures of 20°C (68°F) and significantly higher precipitation at 89 mm (3.5 in) across 11 days, along with increased humidity at 83%. For a detailed look at November weather in Sintra, you can visit Sintra weather in November.

In May, the weather is generally milder with temperatures ranging from a minimum of 11°C (53°F) to a pleasant maximum of 24°C (76°F), producing an average of 16°C (61°F). This month experiences relatively low precipitation at 33 mm (1.3 in) over just 3 days, accompanied by a humidity level of 70%. In contrast, December brings cooler temperatures, with lows around 9°C (49°F) and a maximum of only 17°C (63°F), averaging at 14°C (58°F). It is also wetter, recording 73 mm (2.9 in) of rainfall spread across 10 days and higher humidity at 85%. For more detailed information about December weather, you can check Sintra weather in December.

Compare Sintra's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Sintra

As May unfolds in Sintra, the weather strikes a delightful balance, featuring warmer temperatures that invite outdoor exploration while maintaining a comfortable average. With only a few days of rain and moderate humidity, this month is a refreshing change from the more variable weather patterns seen in the preceding months. Visitors can enjoy longer, sunnier days, perfect for discovering Sintra's stunning landscapes and historic sites. For a comprehensive overview of the climate throughout the year, check out Sintra Climate.