May Weather in La Union, Peru

Last updated: August 27, 2025

May in La Unión, Peru, is characterized by cool temperatures and notable precipitation. With a maximum of 16°C (61°F) and an average of 7°C (45°F), visitors can expect brisk conditions, occasionally dipping to a minimum of -2°C (29°F). Rainfall is significant, totaling 68 mm (2.7 in) over 20 days, making May one of the wetter months. The 86% humidity adds to the overall cool and damp atmosphere, creating a uniquely refreshing experience amidst the stunning landscapes of this Peruvian region.

May Temperature in La Union

In May, temperatures in La Union, Peru begin to reflect the cool grip of the approaching winter. The minimum temperature hovers around -2°C (29°F), while the average remains steady at 7°C (45°F), signaling a consistent chill in the air. Daytime highs reach 16°C (61°F), offering a subtle warmth amid the crispness. This month continues the trend of gradual cooling noticed since January, where temperatures consistently dip and highs stabilize around the mid-teens. May serves as a gentle transition, as the region prepares for the chillier months ahead, providing a unique blend of fresh mountain air and invigorating outdoor experiences.

May Weather in La Union: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in La Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Union, 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).
JanFebMarAprMayJunJulAugSepOctNovDec454646454544434343454646
Data source: Temperature data for La Union generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in La Union

In May, La Union, Peru experiences a noticeable shift in precipitation patterns, with an average rainfall of 68 mm (2.7 in), which marks a significant decrease from the previous months. Characterized by 20 rainy days, May heralds the transition into drier conditions compared to the heavy rains seen earlier in the year, particularly in March with 189 mm. This month serves as a turning point, as rainfall tapers off leading into the even drier months of June and July, where precipitation drops dramatically to 33 mm (1.3 in) and 29 mm (1.2 in), respectively. The decline in both rainfall amount and frequency during May suggests a gradual shift towards the region's more arid season, indicating a predictable climatic rhythm that the inhabitants have come to expect.

May Precipitation Trends in La Union

The chart displays monthly precipitation patterns in La Union, 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 La Union, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec1681781891106833293374121137166
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in La Union

In May, La Union, Peru, experiences a slight dip in humidity, averaging around 86%. This month marks a transition as the lush, humid conditions of early year begin to ease, following the peak months of January to April, when humidity hovered between 88% and 89%. As June approaches, humidity continues to decrease significantly, dropping to 71% and eventually reaching its lowest levels in the winter months. Thus, May serves as a pivotal point, characterized by a comfortable yet humid climate, setting the stage for the drier seasons ahead.

May Average Humidity in La Union

This chart illustrates the average monthly humidity levels in La Union, 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 La Union is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%86%89%89%86%71%44%34%37%50%73%91%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in La Union

In May, La Union, Peru experiences a notably high UV Index of 15, categorizing it as extreme and enforcing a rapid burn time of just 10 minutes for unprotected skin. While this marks a slight decrease from the ongoing UV Index of 19 observed in the earlier months from January to April, it still emphasizes the importance of sun safety. As the region transitions into the cooler months of June and July, the UV Index will dip slightly further, yet it remains a critical factor for outdoor enthusiasts. This trend indicates that even as temperatures may drop, the need for sun protection remains ever-present. For more information on daily UV index levels and safety tips, visit La Union UV Index.

Maximum UV Index Levels in La Union for May

The chart shows the monthly maximum UV Index (UVI) for La Union 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 La Union typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec191919191513141517181817
Data source: La Union 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 La Union

In La Union, Peru, May shines bright with an impressive 326 hours of sunshine, marking it as one of the sunniest months of the year. This peak in sunlight follows a steady upward trend, beginning with 197 hours in January and gradually increasing each month, culminating in 331 hours by July and 332 hours in August. The clear skies of May not only bring warmth but also set the tone for the vibrant energy of winter in this region. After August, the sunshine begins to taper off slightly, yet the generous hours of light in May serve as a cherished reminder of the brighter days, preparing both locals and visitors for the beautiful seasonal transitions ahead.

Monthly Sunshine Duration in La Union: May Highlighted

The May sunshine duration represents the total number of hours La Union 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.
JanFebMarAprMayJunJulAugSepOctNovDec197h224h246h287h326h314h331h332h318h303h255h263h
Data source: La Union May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in La Union During May

In La Union, Peru, the likelihood of enjoying sunny weather sees a notable upswing in May, with a 24% chance of sunshine—a significant increase from the preceding months. This trend marks a gradual escalation in sunny days as the year progresses; starting at a mere 6% in January and reaching a peak of 37% in July. Such seasonal variation highlights a shift toward brighter days following the cooler, cloudier months. By May, residents and visitors alike can anticipate milder weather and more opportunities to bask in the sun, setting the stage for a delightful transition into the drier season.

Percentage of Sunny Days in May in La Union

The chart illustrates the percentage of sunny days in La Union 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 La Union experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec6%8%5%12%24%22%37%30%21%13%5%12%
Data source: La Union May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in La Union in May

In La Union, Peru, the daylight duration exhibits a fascinating rhythm throughout the year. Starting with a consistent 12 hours of daylight in the early months of January through March, the days begin to shorten slightly as April arrives, slipping to 11 hours. This trend continues into May and persists through the winter months of June, July, and August, creating a cozy, twilight-filled atmosphere. However, as spring approaches in September, daylight gradually returns to 12 hours, and this length remains steady through the end of the year, wrapping up the cycle with a return to warmth and light in October, November, and December. This cyclical pattern highlights La Union’s unique relationship with sunlight, offering a blend of long days and serene, shorter ones.

Average Daylight Hours in La Union for May

The chart illustrates the variation in daylight duration in La Union throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec12h 36m12h 23m12h 7m11h 51m11h 39m11h 33m11h 36m11h 47m12h 2m12h 18m12h 32m12h 40m
Data source: La Union daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in La Union

In May, La Union experiences a subtle increase in average wind speed, reaching 1.4 m/s (3 mph), slightly above the steady 1.3 m/s seen throughout the preceding months. This gentle rise not only marks the transition into the cooler months but also hints at a consistent pattern of light winds that continue into June. Following this, the winds pick up more noticeably, moving to 1.6 m/s (4 mph) in both July and August, suggesting a refreshing breeze that pleasantly complements the region's coastal charm. As autumn approaches, the winds gradually decrease again, stabilizing around 1.4 m/s in October before settling into milder speeds for the rest of the year. This rhythm of wind highlights the calm yet dynamic nature of La Union's climate, making it an ideal spot for those who appreciate gentle coastal breezes.

Average May Wind Speed in La Union

The chart displays monthly wind speed patterns in La Union, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1.31.31.31.31.4 m/s1.41.61.61.51.41.21.3
Data source: La Union May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in La Union Compares to Other Months

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

In May, the weather in La Union sees a slight warming trend, with average temperatures ranging from a minimum of -2°C (29°F) to a maximum of 16°C (61°F). Precipitation is moderate, with about 68 mm (2.7 in) falling over 20 days, and humidity levels sitting at 86%. In contrast, January experiences a chillier start, with temperatures ranging from -3°C (27°F) to a slightly higher maximum of 17°C (62°F) and significantly more rainfall, totaling 168 mm (6.6 in) over 25 days. The humidity is also slightly higher at 88% during this month. For more detailed weather insights, you can refer to La Union weather in January.

When comparing the weather in May and February, we see some notable differences. May typically has a lower average temperature of 7°C (45°F) compared to February’s slightly milder average of 8°C (46°F). While both months exhibit similar humidity levels at 86%, May experiences less precipitation, totaling 68 mm (2.7 in) over an average of 20 rainy days, in contrast to February’s much wetter conditions with 178 mm (7.0 in) spread over 27 days. This suggests that although both months can be cool, February is markedly wetter, making it a different experience altogether. For more specific details on February weather, you can visit La Union weather in February.

In comparison, May typically presents milder temperatures than March, with average highs reaching 16°C (61°F) in both months, but May features lower minimum temperatures of -2°C (29°F), while March starts slightly warmer at 0°C (32°F). Precipitation levels in March are significantly higher, with 189 mm (7.5 in) over 30 days compared to May’s 68 mm (2.7 in) across 20 days. Additionally, humidity levels are quite comparable, with March at 89% and May slightly lower at 86%. For more detailed insights, you can check La Union weather in March.

In comparing the weather in May and April, both months share similar temperature ranges, with May exhibiting a minimum of -2°C (29°F), an average of 7°C (45°F), and a maximum of 16°C (61°F). In contrast, April features a slightly higher maximum temperature of 17°C (63°F) while maintaining the same minimum and average temperatures. Precipitation is more pronounced in April, totaling 110 mm (4.3 in) over 26 days compared to May's 68 mm (2.7 in) across 20 days. Additionally, humidity levels are marginally lower in May at 86%, while April has a higher average humidity of 89%. For more detailed weather insights, you can refer to La Union weather in April.

May and June exhibit notable similarities and differences in weather patterns. Both months see maximum temperatures peaking at around 16°C (61°F), yet May has a slightly warmer average temperature of 7°C (45°F) compared to June's 6°C (44°F). However, while May experiences a higher minimum temperature of -2°C (29°F), June's temperature can drop lower, with a minimum of -5°C (24°F). Precipitation also varies significantly; May is relatively wetter with 68 mm (2.7 in) over 20 days, contrasting sharply with June's 33 mm (1.3 in) spread over just 10 days. Additionally, humidity levels are markedly higher in May at 86%, compared to June's 71%. For more detailed insights, you can explore La Union weather in June.

May and July in La Union showcase quite different weather patterns. In May, the temperatures range from a chilly minimum of -2°C (29°F) to an average of 7°C (45°F) and a maximum of 16°C (61°F). The month sees considerable precipitation, with 68 mm (2.7 in) falling over approximately 20 days, accompanied by high humidity levels at 86%. In contrast, July experiences slightly cooler temperatures, with a minimum of -5°C (24°F) and an average of 6°C (43°F), peaking at a maximum of 16°C (62°F). However, July is significantly drier, with only 29 mm (1.2 in) of rain over about 9 days and much lower humidity at 44%. For more detailed information, you can refer to La Union weather in July.

May and August exhibit striking contrasts in weather conditions. In May, temperatures range from a minimum of -2°C (29°F) to a maximum of 16°C (61°F), with an average temperature of 7°C (45°F). The month is characterized by higher precipitation levels, totaling 68 mm (2.7 in) over 20 days, and the humidity is quite high at 86%. In contrast, August features slightly cooler temperatures, with a minimum of -5°C (23°F), an average of 6°C (43°F), and a maximum of 17°C (62°F). Precipitation decreases significantly to 32 mm (1.3 in) spread over just 10 days, while humidity drops to a more comfortable 34%. The overall drier and cooler conditions in August make it a markedly different experience compared to the wetter and more humid atmosphere of May. For more details on August weather patterns, check out La Union weather in August.

In May, temperatures range from a chilly min of -2°C (29°F) to a mild max of 16°C (61°F), with an average of 7°C (45°F). The month is characterized by high humidity at 86% and considerable precipitation of 68 mm (2.7 in) spread over 20 days. In contrast, September experiences a similar maximum temperature of 16°C (61°F) but begins with a slight drop in minimum temperature to -3°C (26°F), leading to an average of 6°C (44°F). Additionally, September records slightly higher precipitation of 74 mm (2.9 in) over 21 days, accompanied by a significant decrease in humidity to 37%. For more detailed weather information, you can refer to La Union weather in September.

In May, temperatures range from a chilly -2°C (29°F) to a mild maximum of 16°C (61°F), with an average of 7°C (45°F). The month experiences significant precipitation, with 68 mm (2.7 in) spread over about 20 days, leading to a high humidity level of 86%. In contrast, October shows similar minimum temperatures at -2°C (29°F) but slightly higher maximum temperatures reaching 17°C (63°F). While the average temperature remains unchanged at 7°C (45°F), October experiences considerably more rainfall at 121 mm (4.8 in) across 28 days, resulting in lower humidity levels of 50%. For more details on weather patterns, check out La Union weather in October.

May and November share some similarities in temperature, with both months featuring average highs around 16°C (61°F) and 62°F, respectively. However, May tends to be slightly milder with minimum temperatures averaging -2°C (29°F), compared to November’s -3°C (27°F). Precipitation levels in November are significantly higher, with 137 mm (5.4 in) of rain over 28 days, compared to May's 68 mm (2.7 in) across 20 days. Furthermore, November also has a lower humidity level at 73%, compared to May’s higher humidity of 86%. For a deeper look into November weather in this region, check out La Union weather in November.

May and December in La Union exhibit some notable differences in weather patterns. In May, temperatures range from a minimum of -2°C (29°F) to a maximum of 16°C (61°F), with an average of 7°C (45°F). The month experiences around 68 mm (2.7 in) of precipitation spread over 20 days, accompanied by a humidity level of 86%. In contrast, December sees slightly milder temperatures with a minimum of -2°C (28°F) and a maximum of 18°C (65°F), averaging 8°C (46°F). However, it is significantly wetter, receiving 166 mm (6.5 in) of rainfall over 29 days and higher humidity at 91%. For more detailed insights into December weather, check out La Union weather in December.

Compare La Union's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in La Union

As May unfolds in La Union, the weather presents a distinct character compared to other months. The average temperatures drop notably, leading to cooler days and chilly nights, while the likelihood of rain increases significantly, resulting in a humid atmosphere that feels quite different from the dry spells of previous months. With about 20 days of precipitation, locals and visitors alike should be prepared for the wet conditions. This damp chill and elevated humidity make May a unique time in La Union, adding a lush vibrancy to the landscape. For a detailed look at the year-round climate, visit La Union Climate.