May Weather in Helensburgh, United Kingdom

Last updated: March 17, 2025

Experience the vibrant May weather of Helensburgh, United Kingdom, where temperatures can soar to a maximum of 25°C (77°F), while the average sits at a refreshing 10°C (51°F). Despite the warmth, this month can surprise with cooler evenings, dipping to a minimum of -1°C (30°F). Visitors should be prepared for frequent rainfall, as May brings 87 mm (3.4 in) of precipitation over 14 days, resulting in a lush, green landscape. With humidity levels around 80%, the air feels alive, making this coastal town both invigorating and picturesque as spring unfolds.

May Temperature in Helensburgh

In Helensburgh, May heralds a delightful shift in temperatures, welcoming the onset of warmer days. As spring reaches its pinnacle, the minimum temperature rises to a crisp -1°C (30°F), while daytime averages climb to a pleasant 10°C (51°F). With maximum temperatures soaring to an impressive 25°C (77°F), the month showcases a remarkable transformation from the chill of winter. This trend of increasing warmth continues through May’s sunny days, inviting residents and visitors alike to embrace outdoor activities and enjoy the blossoming scenery. Overall, the month stands out as a vibrant precursor to the warmer summer months ahead, where the comforting embrace of milder temperatures becomes a welcome norm.

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

The chart illustrates May temperature patterns in Helensburgh, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec394042455156595854494440
Data source: Temperature data for Helensburgh 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 Helensburgh

May in Helensburgh, United Kingdom, sees a moderate level of precipitation, with 87 mm (3.4 in) of rain spread over 14 days. This marks a noticeable increase compared to April's drier conditions, where only 63 mm (2.5 in) fell in 13 days. The uptick in rainfall aligns with the overall trend of spring transitioning into summer, as it prepares the landscape for the lush growth ahead. While May’s precipitation remains below the heavier months that follow, such as August and October, it serves as a crucial precursor to the wetter conditions typical of the summer season. As the days warm up, this blend of rainfall contributes to the vibrant greenery that Helensburgh is celebrated for.

May Precipitation Trends in Helensburgh

The chart displays monthly precipitation patterns in Helensburgh, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1171951526387142124183135202161161
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Helensburgh

In May, Helensburgh experiences a slight reprieve from the winter's heavy dampness, with humidity levels dropping to 80%. This is the lowest point of the year, signaling a gradual transition into the warmer months. Following April’s 85%, the decrease in humidity not only contributes to a more comfortable climate but also heralds the arrival of summer. As the season progresses into June and July, humidity levels inch back up to 83% and 82%, respectively, suggesting a return to the characteristic moistness of the region. However, the spring month of May offers a refreshing break, making it a delightful time to enjoy the picturesque scenery of Helensburgh.

May Average Humidity in Helensburgh

This chart illustrates the average monthly humidity levels in Helensburgh, 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.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%85%81%83%82%82%88%90%92%89%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Helensburgh

As we transition into May, Helensburgh sees a notable shift in sun exposure, with the UV Index rising to 6—indicating a high risk of harm from unprotected sun exposure. This marks a distinct increase from the moderate levels seen in previous months, such as April's Index of 5. Consequently, the recommended burn time decreases to just 25 minutes, emphasizing the need for sun safety measures. The climb in UV protection requirements is a precursor to the summer months, where the UV Index peaks. For reliable information on how to stay safe in the sun, visit Helensburgh UV Index.

Maximum UV Index Levels in Helensburgh for May

The chart shows the monthly maximum UV Index (UVI) for Helensburgh 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.
JanFebMarAprMayJunJulAugSepOctNovDec123568865311
Data source: Helensburgh 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 Helensburgh

In Helensburgh, United Kingdom, May shines brightly as a highlight of the year's sunshine, boasting an impressive 391 hours of sunlight. This marks a significant increase from the more modest 322 hours recorded in April, setting the stage for a vibrant spring. Following May, the sunny days continue, with June and July maintaining the momentum at 384 and 389 hours, respectively. However, as summer gives way to autumn, we see a gradual decline in sunlight, with August dropping to 341 hours and September further dwindling to 272 hours. The trend continues into the late months, reminding us that while May may be the pinnacle of sunshine, the charm of Helensburgh persists throughout the changing seasons.

Monthly Sunshine Duration in Helensburgh: May Highlighted

The May sunshine duration represents the total number of hours Helensburgh 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.
JanFebMarAprMayJunJulAugSepOctNovDec66h123h174h322h391h384h389h341h272h202h106h66h
Data source: Helensburgh May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Helensburgh During May

In Helensburgh, United Kingdom, May offers a moderate chance of sunny weather, with a 29% likelihood of encountering sunshine. This marks a notable increase from the preceding month of April, which boasts a much higher 46% chance of sun, hinting at a gradual warming trend as spring unfolds. However, this year's May figures still fall short compared to the sunnier peaks usually seen in the summer months like June and July. Interestingly, the likelihood of sunny days tends to fluctuate throughout the year, with the traditionally bleak months of winter seeing percentages as low as 14% in December. Thus, while May can be a pleasant month, residents and visitors should keep their expectations in check, preparing for both sunny spells and the occasional cloud cover.

Percentage of Sunny Days in May in Helensburgh

The chart illustrates the percentage of sunny days in Helensburgh 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 Helensburgh experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec26%23%16%46%29%22%25%23%15%16%25%14%
Data source: Helensburgh May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Helensburgh in May

In Helensburgh, United Kingdom, the arrival of May heralds a delightful extension of daylight, with the sun gracing the sky for a remarkable 16 hours. This increase follows a steady ascent from January's modest 7 hours, through the blooming days of April, where daylight reaches 14 hours. The trend in May highlights a transition towards the lighter summer months; this period is marked by vibrant energy and a multitude of outdoor activities. As the longest days approach in June, daylight peaks at 17 hours, creating a captivating contrast to the deepening shadows of late autumn and winter. Such seasonal shifts not only enhance the charm of May but also invigorate the community, encouraging a celebration of nature's beauty and the longer, brighter days ahead.

Average Daylight Hours in Helensburgh for May

The chart illustrates the variation in daylight duration in Helensburgh throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 41m9h 35m11h 53m14h 14m16h 20m17h 28m16h 51m14h 57m12h 40m10h 21m8h 13m7h 3m
Data source: Helensburgh daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Helensburgh

In May, Helensburgh experiences a gentle breeze, with an average wind speed of 3.1 m/s (7 mph), similar to the calmness of the preceding month. This slight uptick from April's 2.8 m/s (6 mph) indicates a subtle shift as spring draws closer to summer. Interestingly, May's winds fluctuate modestly throughout the season, maintaining a light and refreshing feel conducive to outdoor activities. As the year progresses, the winds tend to mellow further, peaking in February at 5.0 m/s (11 mph) before gradually tapering off in the summer months, making May a delightful transition month for both locals and visitors to embrace the fresh air and scenic beauty of the region.

Average May Wind Speed in Helensburgh

The chart displays monthly wind speed patterns in Helensburgh, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.05.03.92.83.1 m/s3.12.12.42.93.74.03.2
Data source: Helensburgh May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Helensburgh Compares to Other Months

The weather in Helensburgh 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 Helensburgh and find detailed weather information for every month.

May and January present a stark contrast in weather conditions. In May, temperatures range from a chilly minimum of -1°C (30°F) to a comfortable maximum of 25°C (77°F), with an average of 10°C (51°F). The month experiences about 87 mm (3.4 in) of precipitation over 14 days, accompanied by a humidity level of 80%. Conversely, January is much colder, with temperatures dipping to a minimum of -7°C (20°F) and reaching a maximum of 13°C (55°F), averaging just 4°C (40°F). It also has a slightly higher precipitation level of 117 mm (4.6 in) over the same number of days, and higher humidity at 90%. For more insights, check out Helensburgh weather in January.

When comparing the weather in May and February, notable differences emerge in temperature and precipitation. May features milder conditions, with temperatures ranging from a minimum of -1°C (30°F) to a maximum of 25°C (77°F), and an average temperature of 10°C (51°F). In contrast, February is much colder, with temperatures ranging from -8°C (18°F) to a maximum of only 13°C (56°F), averaging at 5°C (40°F). Additionally, May experiences significantly less precipitation at 87 mm (3.4 in) over 14 days, while February sees much higher rainfall, totaling 195 mm (7.7 in) across 19 days. Humidity levels are also slightly higher in February at 88%, compared to 80% in May. For more detailed information, you can check Helensburgh weather in February.

In comparing the weather between May and March, we see notable differences in temperature and precipitation. May enjoys milder temperatures, ranging from a minimum of -1°C (30°F) to a pleasant maximum of 25°C (77°F), with an average around 10°C (51°F). In contrast, March is chillier, with temperatures dipping as low as -7°C (19°F) and peaking at 16°C (62°F), averaging 6°C (42°F).

Moreover, May experiences less precipitation than March, with 87 mm (3.4 in) over 14 days compared to March's 152 mm (6.0 in) over 19 days. Both months have relatively high humidity levels, with May at 80% and March at 86%. For a more detailed view of March weather conditions, you can visit Helensburgh weather in March.

The weather in May shows a noticeable shift compared to April, marked by warmer temperatures and increased precipitation. While April averages a minimum of -4°C (24°F) and a maximum of 22°C (72°F), May sees a milder minimum of -1°C (30°F) and a peak of 25°C (77°F). Additionally, May witnesses more precipitation, totaling 87 mm (3.4 in) over 14 days, compared to April's 63 mm (2.5 in) over 13 days. Despite the slight increase in average humidity from April to May—85% to 80%—the overall warmth and rain in May create a different atmospheric experience. For a more detailed look at April's weather specifics, check out Helensburgh weather in April.

In May, the weather typically features a minimum temperature of -1°C (30°F) and an average of 10°C (51°F), with maximum temperatures reaching 25°C (77°F). The month sees around 87 mm (3.4 in) of precipitation over 14 days, accompanied by a humidity level of 80%. In contrast, June experiences warmer temperatures with a minimum of 4°C (39°F), an average of 13°C (56°F), and maximums that rise to 28°C (82°F). However, June also brings increased precipitation, totaling 142 mm (5.6 in) across 18 days and slightly higher humidity at 83%. For more detailed insights, you can visit Helensburgh weather in June.

May and July exhibit notable differences in weather conditions, reflecting the transition from spring to summer. In May, temperatures range from a chilly -1°C (30°F) at night to a pleasant 25°C (77°F) during the day, with an average of around 10°C (51°F). The month also experiences 87 mm (3.4 in) of precipitation over approximately 14 days, with humidity reaching 80%. In contrast, July features milder temperatures, with a minimum of 7°C (44°F) and a maximum of 27°C (81°F), averaging at 15°C (59°F). Precipitation increases to 123 mm (4.9 in) over about 16 days, coupled with slightly higher humidity at 82%. For more detailed weather insights, you can check Helensburgh weather in July.

When comparing the weather in May and August, there are notable differences in temperature and precipitation. In May, temperatures range from a chilly -1°C (30°F) at night to a comfortable 25°C (77°F) during the day, with an average of 10°C (51°F). The month experiences about 87 mm (3.4 in) of precipitation over 14 days and has humidity levels around 80%. In contrast, August sees a slight overall increase in minimum and average temperatures, with lows of 6°C (43°F) and an average of 14°C (58°F), while still peaking at 25°C (77°F). However, it is significantly wetter, with 183 mm (7.2 in) of rain across 22 days and a nearly identical humidity level of 82%. For more insights on the weather, check out Helensburgh weather in August.

In May, the weather features a broader range of temperatures, with minimums around -1°C (30°F) and maximums reaching up to 25°C (77°F), averaging at 10°C (51°F). While there is some precipitation, totaling 87 mm (3.4 in) over 14 days, the humidity level is a manageable 80%. In contrast, September has a similarly high maximum of 25°C (77°F) but starts off with a slightly cooler minimum of -3°C (27°F) and a higher average of 12°C (54°F). This month also sees increased rainfall, accumulating 135 mm (5.3 in) across 17 days, along with a higher humidity of 88%. For more details, you can refer to Helensburgh weather in September.

In May, temperatures begin to warm up, ranging from a low of -1°C (30°F) to a comfortable high of 25°C (77°F), with an average of 10°C (51°F). The month typically sees about 87 mm (3.4 in) of precipitation over 14 days, with a humidity level around 80%. In contrast, October experiences cooler temperatures, with minimums dropping to -3°C (27°F) and a maximum of 19°C (67°F), resulting in an average of 9°C (49°F). This month is significantly wetter, accumulating 202 mm (7.9 in) of rain over 21 days and higher humidity at 90%. For more detailed information on October weather, you can refer to Helensburgh weather in October.

May and November present contrasting weather patterns. In May, temperatures range from a cool -1°C (30°F) at night to a pleasant 25°C (77°F) during the day, with an average of 10°C (51°F). The month sees about 87 mm (3.4 in) of precipitation over 14 days, accompanied by relatively high humidity at 80%. In contrast, November experiences colder temperatures, with a minimum of -4°C (25°F) and a maximum of only 14°C (57°F), averaging 6°C (44°F). Additionally, it is a wetter month, receiving 161 mm (6.3 in) of rain spread over 18 days and higher humidity levels at 92%. For more details about November weather, you can check out Helensburgh weather in November.

May and December present quite different weather conditions. In May, temperatures range from a minimum of -1°C (30°F) to a pleasant maximum of 25°C (77°F), with an average of 10°C (51°F). The month experiences about 87 mm (3.4 in) of precipitation spread over 14 days, accompanied by a humidity level of 80%. In contrast, December is much colder, with temperatures dipping to a minimum of -6°C (21°F) and reaching a maximum of 12°C (54°F), averaging 5°C (41°F). The month is also wetter, receiving 161 mm (6.3 in) of precipitation over 19 days, and it has a slightly higher humidity level of 89%. For more details, you can check the Helensburgh weather in December.

Compare Helensburgh's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Helensburgh

As May unfolds in Helensburgh, the weather begins to shift dramatically compared to the chill of earlier months. With temperatures climbing to comfortable highs and a refreshing average, it offers a pleasant respite from winter's grip. However, May tends to be on the wetter side, with frequent rainy days that echo the spring's transitional nature. At the same time, the humidity remains relatively high, contributing to a lush, vibrant landscape. Overall, May provides a delightful blend of warmth and moisture that invites locals and visitors alike to relish in the beauty of the season. For more detailed insights on Helensburgh's weather patterns, visit Helensburgh Climate.