May Weather in Rila, Bulgaria

Last updated: August 21, 2025

May in Rila, Bulgaria experiences a striking blend of temperatures, with maximums reaching 27°C (81°F) and averaging around 13°C (55°F). While the days can be pleasantly warm, the nights may drop to a cool 0°C (32°F), offering a refreshing contrast. This month is characterized by noticeable precipitation, totaling 106 mm (4.2 in) over 17 days, contributing to the lush landscape that Rila is known for. With humidity levels at a comfortable 73%, May provides a vibrant setting perfect for outdoor exploration amid the scenic wonders of this mountainous region.

May Temperature in Rila

In May, Rila, Bulgaria, experiences a delightful transition into warmer weather, with temperatures marking a significant rise from the chill of winter. The month begins with a minimum temperature of 0°C (32°F), and as the days unfold, the average rises to a comfortable 13°C (55°F), peaking at a pleasant 27°C (81°F). This upward trend illustrates spring's full embrace, making it a perfect time for outdoor activities and exploring the stunning landscapes. As May sets the stage for summer, the moderate temperatures follow the pattern of April’s gradual warm-up, highlighting a clear shift from the frosty extremes of the earlier months. With days filled with sunshine, it's a season that invites both locals and visitors to revel in the beauty of Rila.

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

The chart illustrates May temperature patterns in Rila, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rila, 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).
JanFebMarAprMayJunJulAugSepOctNovDec283438465561666659504133
Data source: Temperature data for Rila 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 Rila

May signals a transition into wetter weather in Rila, Bulgaria, with precipitation reaching a notable 106 mm (4.2 in), marking it as one of the rainiest months of the year. Accompanying this increase, the frequency of rainy days rises to 17, indicating a noticeable shift from April's 12 days of precipitation. This trend reflects the region's gradual move towards summer, where the lush landscape flourishes under the nourishing rains. Notably, the precipitation in May stands in stark contrast to the drier summer months ahead, highlighting the importance of this month as a key player in the annual precipitation cycle.

May Precipitation Trends in Rila

The chart displays monthly precipitation patterns in Rila, 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 Rila, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec64579270106141844638564891
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Rila

In May, Rila, Bulgaria experiences a slight increase in humidity, with levels averaging around 73%. This marks a transition from the much drier April, which saw a drop to 71%, hinting at the gradual rise in moisture as spring progresses. As the country moves towards the warmer months, humidity levels will continue to fluctuate, with June typically seeing a decrease to 67%. This trend indicates that while May brings a touch of mugginess, it is part of a broader shift that leads into the drier summer season. Overall, the month serves as a bridge between the cold, humid winter months and the pleasant, yet less humid, summer days ahead.

May Average Humidity in Rila

This chart illustrates the average monthly humidity levels in Rila, 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 Rila is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%85%83%71%73%67%68%50%59%79%87%89%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Rila

As spring transitions into summer, May in Rila, Bulgaria witnesses a significant surge in UV exposure, with the UV Index soaring to 9, categorizing it as very high. This means that sun protection is essential, as the recommended burn time drops to just 15 minutes. Compared to earlier months, the increase from an UV Index of 8 in April shows a clear upward trend, reflecting the intensifying sun as the season progresses. Visitors and locals alike should remain vigilant, as the UV Index will only peak further in June and July. For those looking to enjoy the outdoors, understanding these trends is crucial; check the full details at Rila UV Index to stay informed and safe under the sun.

Maximum UV Index Levels in Rila for May

The chart shows the monthly maximum UV Index (UVI) for Rila 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 Rila typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34789101098632
Data source: Rila 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 Rila

May in Rila, Bulgaria, ushers in a delightful shift towards brilliant sunshine, boasting 395 hours of radiant daylight. This month marks a peak in the steady progression of hours as winter's grasp loosens, highlighted by an impressive increase from 340 hours in April. The transition is clear: as the days lengthen, outdoor pursuits flourish against the backdrop of blooming nature. Following May, June and July maintain this sunny momentum with 395 and 424 hours respectively, making the early summer an ideal time to explore the breathtaking landscapes of Rila. The gradual decline into autumn can be felt from August onward, yet May remains a standout month, celebrated for its vibrant weather and the promise of sunny adventures ahead.

Monthly Sunshine Duration in Rila: May Highlighted

The May sunshine duration represents the total number of hours Rila 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.
JanFebMarAprMayJunJulAugSepOctNovDec175h239h289h340h395h395h424h400h343h289h236h211h
Data source: Rila May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Rila During May

In Rila, Bulgaria, the likelihood of sunny weather shows a fascinating trend as the months progress. While May boasts a 46% chance of sunshine, it’s nearly on par with the preceding months, such as April (45%) and March (47%). However, compared to the peak summer months, such as July (71%) and August (76%), May represents a transitional period, gradually shifting towards brighter days. The weather in May offers a pleasant blend of warmth and light, making it an excellent time to experience the natural beauty of Rila before the summer crowds arrive. Thus, while visitors can expect a fair share of sunshine in May, the best is yet to come in the following months.

Percentage of Sunny Days in May in Rila

The chart illustrates the percentage of sunny days in Rila 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 Rila experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec26%52%48%45%46%45%71%76%53%49%36%34%
Data source: Rila May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Rila in May

In Rila, Bulgaria, the transition into spring heralds a noticeable increase in daylight hours, peaking in the summer months. Starting from January's modest nine hours, the days gradually lengthen, with February offering ten hours and March pushing it to eleven. As April embraces the warmth of early spring, daylight stretches to thirteen hours, paving the way for May, which enjoys a splendid fourteen hours of sunlight. This trend continues into June, where daylight reaches its zenith at fifteen hours. However, as summer wanes, the hours start to dwindle again—July and August see a gentle decline, returning to thirteen hours, while September and October bring further reductions until November and December settle back to the nine hours of early winter. The rhythm of daylight in Rila beautifully encapsulates the changing seasons, inviting both locals and visitors to revel in the sun-kissed days of spring and summer.

Average Daylight Hours in Rila for May

The chart illustrates the variation in daylight duration in Rila throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 29m10h 34m11h 57m13h 22m14h 34m15h 11m14h 52m13h 48m12h 26m11h 1m9h 47m9h 8m
Data source: Rila daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Rila

In May, the gentle breezes of Rila, Bulgaria, continue the trend of calmness established in the earlier months, with an average wind speed of 1.9 m/s (4 mph). This measure mirrors the wind patterns seen from January through April, suggesting a consistency in the serene atmosphere that characterizes this time of year. As spring transitions into summer, the winds become slightly lighter, with June recording the lowest average of the year at 1.5 m/s (3 mph). Overall, the May winds maintain a refreshing yet tranquil environment, making it an ideal month for outdoor adventures and enjoying the breathtaking landscapes of Rila.

Average May Wind Speed in Rila

The chart displays monthly wind speed patterns in Rila, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.01.91.91.81.9 m/s1.51.61.71.71.81.71.9
Data source: Rila May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Rila Compares to Other Months

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

In comparing the weather of May and January, we see a striking contrast in temperatures and conditions. May boasts a comfortable average temperature of 13°C (55°F), with daytime highs reaching up to 27°C (81°F), while January experiences a much colder climate, averaging -2°C (28°F) and dropping as low as -26°C (-14°F). Additionally, May receives more precipitation at 106 mm (4.2 in) over 17 days, compared to January's 64 mm (2.5 in) over just 10 days, though January's humidity is notably higher at 89% versus May's 73%. For a closer look at January weather conditions, you can check Rila weather in January.

May and February present stark contrasts in weather conditions. In May, temperatures range from a chilly 0°C (32°F) to a warm 27°C (81°F), with an average of 13°C (55°F). The month sees significant precipitation, totaling 106 mm (4.2 in) over 17 days, accompanied by a moderate humidity of 73%. In contrast, February experiences much colder temperatures, with a range from -21°C (-5°F) to a maximum of 16°C (60°F) and an average of just 1°C (34°F). With 57 mm (2.2 in) of precipitation over 10 days and a higher humidity level of 85%, February's climate is decidedly more frigid and damp. For more detailed information, you can visit Rila weather in February.

The weather in May contrasts significantly with that of March. In May, temperatures range from a minimum of 0°C (32°F) to a maximum of 27°C (81°F), with an average of 13°C (55°F). This month also sees about 106 mm (4.2 in) of rainfall, spread over 17 days, coupled with a humidity level of 73%. In comparison, March experiences much colder temperatures, with a minimum of -17°C (1°F) and a maximum of 19°C (67°F), averaging only 3°C (39°F). Precipitation in March totals around 92 mm (3.6 in) over 14 days, with a slightly higher humidity of 83%. For more detailed information, you can check Rila weather in March.

In comparing the weather for April and May, May tends to be warmer and wetter than April. April has a colder temperature range with a minimum of -8°C (18°F) and an average of 8°C (47°F), while May sees a minimum of 0°C (32°F) and an average of 13°C (55°F). Additionally, the maximum daytime temperatures in April reach up to 23°C (73°F), but in May, they can soar to 27°C (81°F). Precipitation is more frequent in May, occurring on 17 days with a total of 106 mm (4.2 in), compared to April's 70 mm (2.8 in) over 12 days. Both months have similar humidity levels, with May at 73% and April at 71%. For more detailed insights, you can check Rila weather in April.

May and June exhibit a noticeable transition in weather patterns. In May, temperatures range from a minimum of 0°C (32°F) to a maximum of 27°C (81°F), with an average temperature of 13°C (55°F). The month sees around 106 mm (4.2 in) of precipitation over approximately 17 days, coupled with a humidity level of 73%. In contrast, June experiences milder minimum temperatures of 4°C (39°F) and higher maximums of 31°C (87°F), leading to a warmer average of 16°C (61°F). Rainfall also increases in June, accumulating to about 141 mm (5.6 in) across 20 days, although the humidity dips slightly to 67%. For more detailed information, check out Rila weather in June.

In May, the weather is quite variable, with temperatures ranging from a chilly 0°C (32°F) at night to a pleasant 27°C (81°F) during the day, averaging around 13°C (55°F). The month is characterized by higher humidity levels at 73% and frequent rainfall, with 106 mm (4.2 in) of precipitation spread over 17 days. In contrast, July offers warmer conditions, with minimum temperatures of 8°C (46°F) and maximums reaching up to 32°C (90°F), resulting in a comfortable average of 19°C (66°F). Precipitation decreases to 84 mm (3.3 in) over just 11 days, and humidity dips slightly to 68%. For a more detailed understanding of July weather, you can check Rila weather in July.

In comparing the weather between May and August, it’s evident that August typically enjoys warmer temperatures, with an average of 19°C (67°F) compared to May's milder average of 13°C (55°F). While May can still have cooler nights, dipping to as low as 0°C (32°F), August's minimum temperature is noticeably higher at 8°C (46°F). Additionally, May experiences significantly more precipitation, averaging 106 mm (4.2 in) over 17 days, whereas August sees much less rain, with only 45 mm (1.8 in) over just 7 days. The humidity also drops in August to 50%, in contrast to May's more humid average of 73%. For more details on the weather during August, you can check out Rila weather in August.

May and September present contrasting weather conditions. In May, temperatures range from a minimum of 0°C (32°F) to a maximum of 27°C (81°F), with an average of 13°C (55°F). This month sees considerable precipitation, totaling 106 mm (4.2 in) over 17 days, and a high humidity level of 73%. In contrast, September boasts a cooler minimum temperature of -2°C (28°F) but a warmer maximum of 30°C (86°F), with an average temperature of 15°C (59°F). It experiences significantly less rainfall, only 38 mm (1.5 in) across just 5 days, and lower humidity at 59%. For more detailed insights, check out Rila weather in September.

May and October present strikingly contrasting weather patterns. In May, temperatures range from a minimum of 0°C (32°F) to a maximum of 27°C (81°F), with an average of 13°C (55°F), while precipitation is relatively high at 106 mm (4.2 in) over about 17 days, and humidity hovers around 73%. Conversely, October sees cooler temperatures, with a minimum of -4°C (26°F) and an average of 10°C (50°F), though it can still reach a maximum of 27°C (80°F). Precipitation in October is significantly lower at 56 mm (2.2 in) across just 6 days and humidity increases slightly to 79%. For more detailed insights into October weather specifically, you can check Rila weather in October.

In May, temperatures generally range from a minimum of 0°C (32°F) to a maximum of 27°C (81°F), with an average of 13°C (55°F), while November presents a much cooler climate, with minimum temperatures dropping to -11°C (13°F) and an average of just 5°C (42°F). Additionally, May experiences significantly more precipitation, totaling 106 mm (4.2 in) over 17 days, compared to November's 48 mm (1.9 in) spread over only 8 days. The humidity in November is notably higher at 87%, compared to May's 73%, contributing to a chillier feel. For those interested in a more detailed look at November conditions, you can check out Rila weather in November.

In May, the weather is generally mild, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 27°C (81°F). The average temperature hovers around 13°C (55°F), and precipitation is fairly common, falling on about 17 days with a total of 106 mm (4.2 in). The humidity level is relatively comfortable, around 73%.

In contrast, December brings much colder conditions, with temperatures dipping to a minimum of -21°C (-5°F) and only reaching up to 12°C (53°F) at most. The average temperature in December is just 1°C (33°F), and while it experiences less precipitation than May at 91 mm (3.6 in), it falls over fewer days, totaling 12. The humidity is higher, at 89%, contributing to a chilling atmosphere. For more detailed information on the weather in December, you can check out Rila weather in December.

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Conclusion: What to Expect From May Weather in Rila

As May arrives in Rila, the weather begins to transition into warmer and more inviting conditions, setting it apart from the chillier months preceding it. With pleasant temperatures peaking at around 27°C and a comfortable average of 13°C, the days are perfect for exploring the stunning landscapes. Although May sees about 17 days of precipitation, the lush greenery that follows is invigorating, complemented by a relative humidity of 73% that enhances the refreshing feel of spring. This month is a delightful balance, paving the way for summer while still featuring the occasional spring shower. To delve deeper into the unique climate characteristics of Rila, check out Rila Climate.