May Weather in Castel Gandolfo, Italy

Last updated: March 24, 2025

May in Castel Gandolfo, Italy offers a delightful blend of spring mildness and occasional warmth, with temperatures peaking at a maximum of 33°C (92°F) and averaging around 18°C (64°F). This month, however, isn't without its surprises, as temperatures can drop to a refreshing minimum of 4°C (40°F), particularly in the early mornings and late evenings. Rainfall is not uncommon, with 89 mm (3.5 in) of precipitation spread over 12 days, contributing to the region’s lush landscapes. Humidity levels hover around 70%, adding a touch of balminess to the air, making May a captivating time to explore the scenic beauty of Castel Gandolfo.

May Temperature in Castel Gandolfo

In May, Castel Gandolfo experiences a delightful transition into warmer weather, marked by minimum temperatures around 4°C (40°F) and soaring to maximums of 33°C (92°F). The average temperature of 18°C (64°F) indicates a significant boost from the preceding months, as the chill of winter fades away. This month showcases a remarkable progression from the brisk early spring days of April, where temperatures ranged from a cooler 0°C (33°F) to a pleasant 27°C (80°F). With the days getting longer and sunnier, May offers the perfect backdrop for outdoor activities and exploration, encouraging visitors to revel in the picturesque landscapes of this charming Italian locale. As the heat climbs, the delightful warmth and lush scenery make Castel Gandolfo a prime destination for those seeking both relaxation and adventure in the blossoming spring season.

May Weather in Castel Gandolfo: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Castel Gandolfo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec444850566472777870615547
Data source: Temperature data for Castel Gandolfo 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 Castel Gandolfo

In May, Castel Gandolfo experiences a moderate precipitation level of 89 mm (3.5 in), spread over 12 days, reflecting a slight increase compared to the preceding months. This is part of a trend where spring brings more rain, as April had 75 mm over 11 days. The month sits comfortably between April’s earlier showers and the significantly drier summer months, such as June, which sees only 47 mm. As the landscape transitions into summer, May’s rainfall nourishes the natural beauty of the region, setting the stage for vibrant greenery in the coming dry months. The gradual rise in precipitation during the spring months indicates a nourishing rhythm that supports both the local flora and the charm of this picturesque Italian locale.

May Precipitation Trends in Castel Gandolfo

The chart displays monthly precipitation patterns in Castel Gandolfo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7392947589473128106106191170
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Castel Gandolfo

In Castle Gandolfo, Italy, the month of May marks the transition into drier weather, with humidity levels stabilizing at 70%. This figure aligns closely with the slightly higher humidity of April, showcasing a seasonal consistency during spring. As the year progresses, humidity levels notably decrease, dipping to 61% in June and continuing downward into the summer months, with July and August experiencing the driest conditions at 57% and 53% respectively. This trend illustrates a shift from the wetter, humid winter months, where January peaks at a high of 84%, to a more comfortable climate well-suited for outdoor activities. As autumn approaches, humidity begins to rise again, reminding us of the cyclical nature of Castel Gandolfo's weather patterns.

May Average Humidity in Castel Gandolfo

This chart illustrates the average monthly humidity levels in Castel Gandolfo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec84%76%69%70%70%61%57%53%65%75%82%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Castel Gandolfo

As May unfolds in Castel Gandolfo, the UV Index escalates to a striking 9, indicating a very high exposure category that significantly reduces the burn time to just 15 minutes. This notable increase, following a milder April with an Index of 7, signals the onset of summer's potent sun. Throughout the year, the trend illustrates a progression from moderate to high UV levels, peaking in the summer months of June and July with an Index of 10. As temperatures rise, it's crucial for residents and visitors to stay vigilant about sun protection to enjoy the beautiful Italian sun safely. For more detailed insights, check the Castel Gandolfo UV Index.

Maximum UV Index Levels in Castel Gandolfo for May

The chart shows the monthly maximum UV Index (UVI) for Castel Gandolfo 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.
JanFebMarAprMayJunJulAugSepOctNovDec34579101098642
Data source: Castel Gandolfo 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 Castel Gandolfo

In May, Castel Gandolfo, Italy, experiences a radiant peak of sunshine with 400 hours of glorious daylight, marking a vibrant transition into summer. This increase follows a steady rise from 355 hours in April, demonstrating a clear trend of lengthening days as the year progresses. As spring unfolds, May's sunshine not only illuminates the stunning landscapes but also draws visitors eager to bask in the warmth. The sunlight continues to build momentum into June, where it reaches 415 hours, hinting at a sun-drenched summer ahead. While the fall ushers in a gradual decline in sunlit hours, it’s in May that the region truly comes alive, showcasing nature in its most luminous form.

Monthly Sunshine Duration in Castel Gandolfo: May Highlighted

The May sunshine duration represents the total number of hours Castel Gandolfo 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.
JanFebMarAprMayJunJulAugSepOctNovDec202h260h327h355h400h415h430h398h338h314h246h244h
Data source: Castel Gandolfo May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Castel Gandolfo During May

As May rolls around in Castel Gandolfo, the likelihood of sunny weather hovers around 46%, marking a gradual shift from the cooler months. While this probability is slightly lower than what the summer months bring—where July and August soar to 70% and 73% respectively—May still represents a reassuring increase from the more overcast April at 44%. Compared to the chilly January, with its mere 35%, the arrival of May signals the onset of warmer days, hinting at a charming blend of springtime blooms and gentle sunshine, perfect for enjoying the breathtaking landscapes of this picturesque Italian town.

Percentage of Sunny Days in May in Castel Gandolfo

The chart illustrates the percentage of sunny days in Castel Gandolfo 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 Castel Gandolfo experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec35%57%58%44%46%59%70%74%53%41%33%48%
Data source: Castel Gandolfo May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Castel Gandolfo in May

In Castel Gandolfo, Italy, the arrival of May brings a delightful increase in daylight, with the sun gracing the skies for an impressive 14 hours. This upward trend continues from the earlier months, where daylight gradually lengthens from 9 hours in January to a bloom of 13 hours in April. The days grow distinctly longer as spring unfolds, creating an inviting atmosphere for outdoor activities and exploration. Following May, June reaches its peak with 15 hours of daylight, yet the charm of May lies in its balance, as warmer temperatures and vibrant landscapes begin to flourish. The cycle of daylight then gently tapers off in the ensuing summer months, highlighting May as a pivotal time of year when nature comes alive and sunlight becomes an integral part of the Castel Gandolfo experience.

Average Daylight Hours in Castel Gandolfo for May

The chart illustrates the variation in daylight duration in Castel Gandolfo throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 31m10h 35m11h 57m13h 21m14h 32m15h 8m14h 49m13h 46m12h 26m11h 2m9h 49m9h 11m
Data source: Castel Gandolfo daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Castel Gandolfo

In Castel Gandolfo, Italy, May welcomes a gentle breeze with an average wind speed of 2.4 m/s (5 mph), making it a delightful time to enjoy the outdoors. Notably, this month sees a slight uptick from the preceding months, with January through April averaging around 2.1 m/s. The winds remain consistent throughout the summer, echoing the 2.4 m/s established in July, while dropping slightly to 2.2 m/s in August. As the year progresses into autumn, the wind speeds begin to taper off, with September recording a low of 1.7 m/s (4 mph). Overall, the tranquil winds of May represent a harmonious balance between the breezy earlier months and the calmer days that follow, inviting visitors to savor the serene beauty of this charming Italian locale.

Average May Wind Speed in Castel Gandolfo

The chart displays monthly wind speed patterns in Castel Gandolfo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.72.32.02.12.4 m/s1.82.42.21.72.22.42.3
Data source: Castel Gandolfo May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Castel Gandolfo Compares to Other Months

The weather in Castel Gandolfo 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 Castel Gandolfo and find detailed weather information for every month.

May and January present contrasting weather conditions. In May, temperatures typically range from a minimum of 4°C (40°F) to a pleasant average of 18°C (64°F), peaking at a warm 33°C (92°F). The month experiences about 89 mm (3.5 in) of precipitation over approximately 12 days, accompanied by a humidity level of 70%. In stark contrast, January is much colder, with temperatures dropping to a minimum of -6°C (21°F) and an average of 7°C (44°F), reaching a maximum of only 18°C (64°F). It sees less precipitation at 73 mm (2.9 in) over 9 days, but the humidity is higher at 84%. For more detailed insights into the January climate, please check the following link: Castel Gandolfo weather in January.

In comparing the weather between February and May, it's evident that May enjoys significantly warmer temperatures, with average highs reaching 33°C (92°F) compared to February's maximum of 20°C (68°F). While February presents chilly conditions with a minimum temperature of -12°C (11°F), May experiences milder lows of 4°C (40°F). Both months see a similar amount of precipitation, with February totaling 92 mm (3.6 in) over 9 days and May receiving 89 mm (3.5 in) over 12 days. Furthermore, February tends to have higher humidity at 76%, compared to May's 70%. For a more detailed look at February's conditions, visit Castel Gandolfo weather in February.

When comparing the weather in March and May, notable differences emerge. March experiences much cooler temperatures, ranging from a minimum of -11°C (12°F) to a maximum of 22°C (72°F), with an average of 10°C (51°F), while May sees significantly warmer conditions, with a minimum of 4°C (40°F) and a maximum of 33°C (92°F), providing a comfortable average of 18°C (64°F). Both months have similar precipitation levels, with March receiving 94 mm (3.7 in) over 10 days and May having slightly less at 89 mm (3.5 in) over 12 days. Humidity remains consistent between the two months, with March at 69% and May at 70%. For a more detailed look at March's weather patterns, you can visit Castel Gandolfo weather in March.

When comparing the weather in April and May, we see a noticeable increase in temperatures. April typically experiences minimum temperatures around 0°C (33°F) and averages around 13°C (56°F), while May sees a minimum of 4°C (40°F) and an average temperature of 18°C (64°F). The maximum temperature also rises significantly; April peaks at 27°C (80°F), whereas May can reach up to 33°C (92°F). Precipitation is also a factor, with April receiving 75 mm (2.9 in) over 11 days, compared to May's 89 mm (3.5 in) over 12 days. Despite the increase in rainfall, the humidity remains consistent at 70% for both months. For more detailed information, you can check Castel Gandolfo weather in April.

In comparing the weather between May and June, we can see notable differences in temperature and precipitation. May typically experiences a broader temperature range, with minimums dipping to 4°C (40°F) and maximums reaching up to 33°C (92°F). The average temperature for the month hovers around 18°C (64°F), accompanied by higher humidity levels of 70% and a total precipitation of 89 mm (3.5 in) over 12 days. In contrast, June sees a rise in both minimum and average temperatures, starting at 10°C (50°F) and averaging 22°C (72°F), with maximums slightly higher at 34°C (94°F). Additionally, June enjoys reduced precipitation of only 47 mm (1.9 in) over just 7 days, and lower humidity at 61%. For more specific insights into the weather in June, you can check out Castel Gandolfo weather in June.

May and July present distinctly different weather patterns. In May, temperatures range from a cool 4°C (40°F) at night to a warm 33°C (92°F) during the day, with an average temperature of 18°C (64°F). This month also sees a fair amount of precipitation, totaling 89 mm (3.5 in) over approximately 12 days, leading to a higher humidity level of 70%. In contrast, July offers a much warmer climate, with minimum temperatures at 16°C (61°F) and maximums reaching up to 36°C (96°F), averaging 25°C (78°F). Rainfall is significantly reduced in July, with only 31 mm (1.2 in) occurring over just 4 days, resulting in lower humidity levels at 57%. For more detailed insights, you can check the Castel Gandolfo weather in July.

May and August present quite a contrast in weather patterns. In May, temperatures range from a chilly minimum of 4°C (40°F) to a warm maximum of 33°C (92°F), with an average of 18°C (64°F). This month experiences significant rainfall, with 89 mm (3.5 in) over 12 days and higher humidity levels of 70%. In contrast, August boasts a much warmer climate, featuring a minimum temperature of 15°C (59°F) and an average of 26°C (79°F) that peaks at 37°C (99°F). Rainfall is considerably lower in August, with only 28 mm (1.1 in) spread over 7 days and humidity dropping to 53%. For more detailed insights about August weather, you can check Castel Gandolfo weather in August.

May and September present distinct weather patterns, each with its own unique charm. In May, temperatures range from a cool 4°C (40°F) to a warm 33°C (92°F), with an average of 18°C (64°F) and relatively high humidity at 70%. This month also sees about 89 mm (3.5 in) of precipitation over approximately 12 days. By contrast, September offers slightly warmer average temperatures, reaching a minimum of 8°C (47°F) and a maximum of 32°C (90°F), with an average of 21°C (70°F). It experiences a bit more rainfall at 106 mm (4.2 in) spread over 10 days, and the humidity drops to 65%. For those seeking to explore the climate specifics, check out Castel Gandolfo weather in September for more information.

May and October present distinct weather patterns, reflecting the transition from spring to autumn. In May, temperatures can range from a minimum of 4°C (40°F) to a maximum of 33°C (92°F), with an average of 18°C (64°F) and relatively high humidity at 70%. There is an average precipitation of 89 mm (3.5 in) over about 12 days, suggesting a mix of warm, sunny days and occasional rain.

In contrast, October experiences slightly cooler temperatures, with a minimum of 6°C (44°F) and a maximum of 28°C (83°F), leading to an average of 16°C (62°F). This month also sees an increase in precipitation, totaling 106 mm (4.2 in) over approximately 10 days, and a slight rise in humidity to 75%. For a more detailed look at the October weather, check out Castel Gandolfo weather in October.

May and November present distinct weather patterns, reflecting the transition from spring to late autumn. In May, temperatures range from a minimum of 4°C (40°F) to a maximum of 33°C (92°F), with an average of 18°C (64°F). This month experiences moderate rainfall of 89 mm (3.5 in) over 12 days, accompanied by a humidity level of 70%. In contrast, November sees a drop in temperatures, ranging from a chilly minimum of -1°C (31°F) to a comfortable maximum of 23°C (73°F), averaging 13°C (55°F). Precipitation significantly increases to 191 mm (7.5 in) over 16 days, and humidity rises to 81%. For more detailed information on November weather, you can explore Castel Gandolfo weather in November.

May and December present stark contrasts in weather. May typically boasts mild temperatures with a minimum of 4°C (40°F) and an average of 18°C (64°F), peaking at 33°C (92°F). It's a month marked by relatively lower precipitation, averaging 89 mm (3.5 in) over 12 days, and a comfortable humidity level of 70%. In contrast, December experiences chillier conditions, with temperatures ranging from a minimum of -3°C (28°F) to an average of 8°C (47°F), and a maximum reaching only 18°C (64°F). This winter month sees higher precipitation at 170 mm (6.7 in) spread across 13 days, coupled with increased humidity at 84%. For a more detailed look at December weather in this region, check out Castel Gandolfo weather in December.

Compare Castel Gandolfo's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Castel Gandolfo

As May rolls into Castel Gandolfo, the weather transforms into a delightful mix of warmth and refreshing breezes. This month marks a significant departure from the cooler days of early spring, with average temperatures climbing steadily, inviting residents and visitors to bask in the sun. While the occasional rain shower may grace the town, leading to an increased humidity level, it only adds to the lush greenery that thrives at this time of year. The balance of warmth and the remnants of spring rain create a vibrant and inviting atmosphere unique to May. For a more in-depth look at Castel Gandolfo's weather patterns throughout the year, visit Castel Gandolfo Climate.