May Weather in Bucharest, Romania

Last updated: August 27, 2025

In May, Bucharest, Romania experiences a vibrant transition into warmer weather, with maximum temperatures reaching up to 31°C (88°F) and an average of 17°C (63°F), creating a pleasant atmosphere for outdoor activities. The month, however, also brings a bit of rain, with 11 days of precipitation totaling 69 mm (2.7 in), contributing to an overall humidity level of 71%. This mix of warmth and humidity fosters a lush spring environment, making May an enchanting time to explore the city's parks and cultural landmarks.

May Temperature in Bucharest

As spring fully embraces Bucharest in May, temperatures start to soar, transforming the city into a vibrant tapestry of color and life. The minimum temperature rises to a comfortable 4°C (39°F), while the average temperature reaches a pleasant 17°C (63°F), inviting locals and visitors alike to enjoy outdoor activities. With highs that can peak at a summery 31°C (88°F), May signifies a significant shift from the chilly grips of winter into the warmth of summer. This month not only displays a welcoming warmth but also marks the beginning of a delightful trend, where increasing temperatures pave the way for an exciting outdoor culture and lively street scenes, urging everyone to make the most of the beautiful Romanian spring.

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

The chart illustrates May temperature patterns in Bucharest, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bucharest, May typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec323743546371747767554537
Data source: Temperature data for Bucharest 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 Bucharest

May in Bucharest marks a noticeable shift in precipitation patterns, with an average of 69 mm (2.7 in) of rain falling over 11 days. This increase reflects the transition from the relatively dry months of early spring, where April saw only 44 mm (1.7 in), to a wetter early summer. The trend indicates that as the city moves into June, a significant leap to 115 mm (4.5 in) is expected, suggesting that late spring showers pave the way for more intense summer storms. This uptick in rainfall during May not only enriches the blooming landscape but also prepares residents for the impending humidity of the season, signaling the arrival of lush greenery throughout the city.

May Precipitation Trends in Bucharest

The chart displays monthly precipitation patterns in Bucharest, 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. In Bucharest, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec4043614469115903323704363
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Bucharest

May in Bucharest, Romania, marks a transition towards drier conditions, with humidity levels dropping to 71%, down from 73% in April. This gradual decline continues into the early summer months, where June sees a slight decrease to 70%, followed by July's even drier 66%. The trend clearly illustrates a shift from the lingering dampness of winter and early spring towards a more refreshing atmosphere, indicative of the upcoming warmer season. As humidity levels continue to drop, residents and visitors alike can enjoy the beauty of blooming flowers and vibrant outdoor activities, all in the comfort of milder, more pleasant humidity.

May Average Humidity in Bucharest

This chart illustrates the average monthly humidity levels in Bucharest, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Bucharest is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%85%82%73%71%70%66%48%57%79%88%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Bucharest

As May arrives in Bucharest, the UV Index escalates to 8, signaling very high exposure levels that call for increased sun safety measures. With a burn time of just 15 minutes, it’s essential to be proactive about protecting your skin during outdoor activities. This significant rise from April's 7 emphasizes a trend towards more intense sun exposure as spring transitions into summer. Just a month later, in June, the UV Index peaks even further at 9, suggesting that outdoor enthusiasts should remain vigilant. As you enjoy the beautiful May weather, remember to check the forecast and prepare adequately for the UV rays. For more detailed information, visit Bucharest UV Index.

Maximum UV Index Levels in Bucharest for May

The chart shows the monthly maximum UV Index (UVI) for Bucharest 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. In May, the maximum UV index in Bucharest typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789987532
Data source: Bucharest 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 Bucharest

In Bucharest, May marks the delightful transition into summer, with the city basking in 398 hours of sunshine—the most radiant month of the spring. This increase from 346 hours in April showcases a vibrant upward trend, as the days grow longer and warmer. Following the steady climb in sunny hours since January's 169 hours, May stands as a shining highlight, leading into June's even sunnier 405 hours. The pattern suggests a joyful embrace of outdoor activities and cultural celebrations that flourish under the Romanian sun, as residents and visitors alike savor the lush beauty and warmth of the season.

Monthly Sunshine Duration in Bucharest: May Highlighted

The May sunshine duration represents the total number of hours Bucharest 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.
JanFebMarAprMayJunJulAugSepOctNovDec169h231h293h346h398h405h425h406h343h288h215h191h
Data source: Bucharest May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Bucharest During May

As May arrives in Bucharest, the likelihood of sunny weather remains notable at 41%, mirroring the previous month of April. This stability in sunshine chances suggests that the city is transitioning into the warm embrace of spring, though it has yet to reach the sunnier peaks seen later in the summer months. The dry and bright days truly begin to flourish in June and July, where the chances soar to 43% and 70% respectively. Thus, while May offers a pleasant mix of sunshine and springtime warmth, it hints at the brighter days just around the corner in the coming summer months.

Percentage of Sunny Days in May in Bucharest

The chart illustrates the percentage of sunny days in Bucharest 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 Bucharest experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec27%36%42%41%41%43%70%70%59%39%38%23%
Data source: Bucharest May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Bucharest in May

As spring transitions into early summer, May in Bucharest, Romania, is marked by a delightful increase in daylight, boasting 14 hours of sunlight that invigorates the city. This surge follows a steady climb from 11 hours in March and 13 hours in April, highlighting a distinct trend of increasing daylight as the year progresses. The warmth and brightness of May foster a vibrant atmosphere, setting the stage for outdoor activities and gatherings, before the longest days of June arrive with 15 hours. This gradual extension of daylight not only enhances the city's appeal but also reflects the shift towards the sun-drenched days of summer.

Average Daylight Hours in Bucharest for May

The chart illustrates the variation in daylight duration in Bucharest throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 14m10h 26m11h 56m13h 29m14h 48m15h 29m15h 7m13h 57m12h 28m10h 56m9h 34m8h 52m
Data source: Bucharest daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Bucharest

In May, Bucharest experiences a gentle breeze, with an average wind speed of 2.7 m/s (6 mph), reflecting the city's delightful spring weather. This slight uptick from the previous months, where wind speeds hovered around 2.6 to 2.7 m/s, indicates a smooth transition into warmer days. It's noteworthy that come June, the winds begin to taper off, dropping to 2.0 m/s (4 mph), suggesting that May is one of the last months to enjoy these moderate breezes before the summer heats up. Overall, May serves as a perfect blend of mild temperatures and refreshing winds, making it an inviting month for outdoor activities in the Romanian capital.

Average May Wind Speed in Bucharest

The chart displays monthly wind speed patterns in Bucharest, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.02.72.72.62.7 m/s2.02.42.32.63.02.42.7
Data source: Bucharest May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Bucharest Compares to Other Months

Weather in Bucharest varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Bucharest, focusing on differences in temperature, rainfall, humidity, and UV levels.

May and January present two starkly contrasting weather patterns. In May, temperatures range from a mild 4°C (39°F) to a pleasant 31°C (88°F), averaging around 17°C (63°F), accompanied by 69 mm (2.7 in) of precipitation over about 11 days, and a humidity level of 71%. In contrast, January is much colder, with temperatures dipping as low as -23°C (-9°F) and averaging around 0°C (32°F). The maximum temperature in January reaches only 15°C (59°F), with a total precipitation of 40 mm (1.6 in) over approximately 7 days, while humidity is higher at 88%. For more detailed weather insights, you can check Bucharest weather in January.

When comparing the weather in May and February, there is a stark contrast in temperatures and conditions. May enjoys a much milder climate, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 31°C (88°F), while February experiences colder temperatures, with a range from a minimum of -14°C (6°F) to a maximum of 21°C (69°F). Additionally, May sees higher precipitation levels of 69 mm (2.7 in) over 11 days, compared to February's 43 mm (1.7 in) over 8 days. Humidity levels are also notable, as February has a higher humidity at 85%, while May's humidity averages around 71%. For more detailed weather information, you can check Bucharest weather in February.

When comparing the weather in March and May, it's clear that May offers a significant increase in warmth and pleasant conditions. May typically sees temperatures ranging from a minimum of 4°C (39°F) to a maximum of 31°C (88°F), while March experiences much colder temperatures, with lows of -19°C (-2°F) and highs reaching only 25°C (77°F). In terms of precipitation, both months are relatively similar, with May receiving 69 mm (2.7 in) over 11 days, compared to March's 61 mm (2.4 in) over 9 days. However, March has a higher humidity level at 82% compared to May's 71%, which can make the colder temperatures feel even more biting. For more insights on March weather, you can check out Bucharest weather in March.

In comparing the weather of May and April, May generally enjoys warmer temperatures, with an average of 17°C (63°F) compared to April's 12°C (54°F). The minimum in May is notably higher, starting at 4°C (39°F), whereas April can dip down to a chilly -1°C (30°F). However, both months showcase the potential for heat, with May reaching a maximum of 31°C (88°F) versus April's 29°C (84°F). Precipitation is slightly higher in May at 69 mm (2.7 in) over 11 days, while April sees less rain, only 44 mm (1.7 in) across 7 days. Humidity levels remain relatively similar, with May at 71% and April slightly higher at 73%. For more details on April's weather, you can visit Bucharest weather in April.

May and June offer contrasting weather patterns as spring transitions into summer. In May, temperatures range from a cool minimum of 4°C (39°F) to a warm average of 17°C (63°F), reaching a maximum of 31°C (88°F). The month experiences relatively moderate precipitation of 69 mm (2.7 in) over 11 days, with a humidity level of 71%. In contrast, June sees a noticeable increase in warmth, with minimum temperatures rising to 7°C (46°F) and an average of 22°C (71°F), peaking at a sweltering 37°C (99°F). However, June is also marked by increased rainfall, totaling 115 mm (4.5 in) across 15 days, while humidity remains similar at 70%. For a detailed look at June weather, you can check Bucharest weather in June.

May and July exhibit notable differences in weather patterns. In May, temperatures range from a chilly minimum of 4°C (39°F) to a pleasant average of 17°C (63°F), with a maximum reaching up to 31°C (88°F). The month experiences around 69 mm (2.7 in) of precipitation over 11 days, coupled with a humidity level of 71%. In contrast, July is significantly warmer, boasting a minimum temperature of 12°C (54°F) and an average of 24°C (75°F), with highs soaring to 38°C (100°F). While July sees a slight increase in precipitation to 90 mm (3.5 in) over just 10 days, humidity decreases to 66%. For a detailed look at July weather, you can visit Bucharest weather in July.

In comparing the weather between May and August, we see notable differences in temperature and humidity. May typically experiences cooler temperatures with a minimum of 4°C (39°F) and an average of 17°C (63°F), reaching a maximum of 31°C (88°F). Additionally, the month is characterized by higher humidity at 71% and more frequent precipitation, totaling 69 mm (2.7 in) over 11 days. In contrast, August offers warmer conditions, with temperatures ranging from a minimum of 11°C (52°F) to an average of 25°C (77°F), peaking at a scorching 38°C (101°F). The humidity drops significantly to 48%, and there is less rainfall, with only 33 mm (1.3 in) over 6 days. For more detailed insights, check out the Bucharest weather in August.

May and September present contrasting weather characteristics. May typically sees a broader temperature range, with lows of 4°C (39°F) and highs reaching up to 31°C (88°F), while September offers a narrower range, where temperatures can drop to 1°C (35°F) and peak at 36°C (97°F). However, September tends to be warmer on average, with temperatures around 20°C (68°F), compared to May's average of 17°C (63°F). Additionally, May experiences more precipitation, with 69 mm (2.7 in) over 11 days, compared to a much drier September, which records only 23 mm (0.9 in) over 3 days. The humidity is also higher in May at 71%, contrasting with September's lower humidity level of 57%. For more detailed insights, check Bucharest weather in September.

May and October present distinct yet somewhat similar weather patterns. In May, temperatures range from a cool 4°C (39°F) at night to a warm average of 17°C (63°F) during the day, with occasional highs reaching 31°C (88°F). The month experiences approximately 69 mm (2.7 in) of precipitation over 11 days, with a humidity level of 71%. In contrast, October sees cooler temperatures, with a minimum of 1°C (33°F) and an average of 13°C (56°F), although it can also reach up to 31°C (87°F) on warmer days. Precipitation is slightly higher at 70 mm (2.8 in), but it typically falls over fewer days, around 7. Humidity is higher in October at 79%. These differences highlight the transition from spring to autumn, with October showcasing a more pronounced chill and increased moisture. For more detailed information, you can check out Bucharest weather in October.

May and November exhibit distinct weather patterns that reflect the changing seasons. In May, temperatures range from a minimum of 4°C (39°F) to an average of 17°C (63°F), peaking at a warm 31°C (88°F). This month also sees an average of 69 mm (2.7 in) of precipitation over about 11 days, with humidity levels at a comfortable 71%.

In contrast, November ushers in cooler temperatures, with a minimum of -5°C (24°F) and an average of 7°C (45°F), though it can still reach a maximum of 28°C (82°F) on warmer days. Rainfall is less in November, totaling 43 mm (1.7 in) over around 8 days, but the humidity is notably higher at 87%. For more insights on November's weather, you can visit Bucharest weather in November.

May and December present strikingly different weather patterns. In May, temperatures range from a mild 4°C (39°F) at night to a warm 31°C (88°F) during the day, with an average temperature of 17°C (63°F). The month experiences about 69 mm (2.7 in) of precipitation over 11 days, along with a relative humidity of 71%. In contrast, December sees significantly colder temperatures, with lows plunging to -9°C (16°F) and a daytime maximum of only 15°C (60°F), resulting in an average temperature of 3°C (37°F). Although December's precipitation is slightly less at 63 mm (2.5 in), it maintains a higher humidity level of 88%. For more specific details about the conditions in December, check out Bucharest weather in December.

Compare Bucharest's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Bucharest

May in Bucharest heralds the arrival of warmer days, setting the stage for a vibrant spring atmosphere. With temperatures climbing significantly higher than the preceding months, you'll enjoy the pleasant balance of daytime warmth and cooler evenings. While the increase in humidity adds a touch of moisture to the air, occasional rain showers contribute to the lushness of the city. Compared to the chill of early spring, May's weather invites both locals and travelers to embrace outdoor activities and explore the blossoming surroundings. For more detailed insights into what to expect throughout the year, check out Bucharest Climate.