May Weather in San Martin, Peru

Last updated: August 27, 2025

In San Martin, Peru, May brings warm and inviting temperatures, with a maximum of 33°C (91°F) and an average of 24°C (75°F), creating a pleasant atmosphere for outdoor activities. The nights cool down to a minimum of 16°C (62°F), ensuring comfortable evenings. While travelers can expect some rainfall, with 13 mm (0.5 in) of precipitation over 4 days, the region remains vibrant and lush. With humidity levels reaching 89%, May showcases the region's tropical charm, perfect for those looking to explore its rich natural beauty.

May Temperature in San Martin

May in San Martin, Peru marks a gentle transition into cooler temperatures, with minimums dipping to around 16°C (62°F) and average highs reaching a comfortable 33°C (91°F). As the warm days of the early year give way to milder conditions, this month offers a pleasant retreat from the higher temperatures experienced in March and April. The average temperature settles at 24°C (75°F), providing an inviting climate for outdoor activities amidst the lush landscapes. This shift not only enhances the region's natural beauty but also creates an ideal environment for exploring its diverse flora and fauna, making May a charming time to visit.

May Weather in San Martin: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in San Martin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Martin, 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).
JanFebMarAprMayJunJulAugSepOctNovDec788080787572696869707175
Data source: Temperature data for San Martin 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 San Martin

In May, San Martin experiences a significant dip in precipitation, with just 13 mm (0.5 in) of rain falling over 4 days. This marks a notable decrease compared to the wetter months before, particularly March, which saw 157 mm (6.2 in) spread across 9 days. As the region transitions into the dry season, June continues this trend, bringing even lighter rainfall of 6 mm (0.2 in) and reducing the number of precipitation days to 2. This pattern showcases the gradual shift from the abundant rains of earlier months to the drier conditions typical of the mid-year period, reflecting San Martin's distinctive climate dynamics.

May Precipitation Trends in San Martin

The chart displays monthly precipitation patterns in San Martin, 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 San Martin, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec206515733136423101430
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Martin

In San Martin, Peru, May experiences a notable peak in humidity, maintaining a high level of 89%, similar to January's conditions. This slight increase from April's 86% suggests that the region is transitioning into the more humid months of the year. Following May, humidity gradually declines through the winter months, dipping to 84% in June and significantly further to 71% in both July and August. The trend indicates a seasonal shift, with the wet, lush climate of early year giving way to a drier spell before humidity levels begin to rise again in the latter part of the year. This cyclical pattern underscores the distinct seasonal variations that characterize San Martin's climate.

May Average Humidity in San Martin

This chart illustrates the average monthly humidity levels in San Martin, 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 San Martin is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%87%87%86%89%84%71%71%75%77%79%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Martin

In May, San Martin, Peru, experiences a UV Index of 13, maintaining its position in the extreme exposure category. This level signifies a burn time of just 10 minutes, reflecting the region's consistent high UV exposure throughout the year. Following a gradual decline from March's peak of 16, the UV Index remains robust, highlighting a trend of minimal variation in UV intensity during the early months. As summer nears its end, travelers and residents alike should continue to practice sun safety to avoid overexposure. For more insights on UV levels throughout the year, check out San Martin UV Index.

Maximum UV Index Levels in San Martin for May

The chart shows the monthly maximum UV Index (UVI) for San Martin 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 San Martin typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141516151311111214141413
Data source: San Martin 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 San Martin

In San Martin, Peru, May shines brightly with an impressive 329 hours of sunshine, marking a peak in the region’s radiant spring. As the months progress from January to April, there’s a steady increase in sunlight, culminating in the sunniest month of the year so far. Following May, sunshine hours slightly dip in June to 312 hours before rising once again in July and August, reflecting a delightful stretch of sunny days that enhance the vibrancy of the landscape. Overall, the trend illustrates a flourishing sun-drenched environment, perfect for outdoor adventures and enjoying the natural beauty of this captivating region.

Monthly Sunshine Duration in San Martin: May Highlighted

The May sunshine duration represents the total number of hours San Martin 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.
JanFebMarAprMayJunJulAugSepOctNovDec271h299h308h318h329h312h325h330h319h327h317h338h
Data source: San Martin May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in San Martin During May

As May rolls in, San Martin, Peru, bids farewell to the gloomy days of earlier months, revealing a noteworthy increase in sunny weather. With a sunny probability rising to 62%, May emerges as one of the most promising months for sunshine, following April's modest 37%. The upward trend continues into the cooler months, with June and July also boasting healthy chances of clear skies at 44% and 60%, respectively. This pattern suggests that as the year progresses, the region embraces a brighter atmosphere, making May an ideal time for outdoor adventures and soaking up the sun.

Percentage of Sunny Days in May in San Martin

The chart illustrates the percentage of sunny days in San Martin 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 San Martin experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec30%31%25%38%62%44%60%45%52%35%30%28%
Data source: San Martin May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Martin in May

In San Martin, Peru, daylight duration exhibits a fascinating rhythm throughout the year. From January to March, residents enjoy a generous 12 hours of sunlight daily, perfect for outdoor adventures and leisurely afternoons. As the months roll into April and May, daylight begins to wane slightly, with an 11-hour span taking hold—a subtle shift that hints at the onset of winter. This steady daylight duration persists through June to August, maintaining that cozy 11-hour mark. However, come September through December, sunlight returns to its former glory, restoring the 12 hours of daylight and inviting a vibrant atmosphere for all to savor. This cyclical pattern of daylight not only influences daily life but also highlights the enchanting transitions of nature in this beautiful region.

Average Daylight Hours in San Martin for May

The chart illustrates the variation in daylight duration in San Martin throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec12h 22m12h 15m12h 6m11h 58m11h 51m11h 48m11h 50m11h 55m12h 3m12h 12m12h 20m12h 24m
Data source: San Martin daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in San Martin

In San Martin, Peru, the wind in May picks up a notch, reaching an average speed of 3.5 m/s (8 mph), marking a subtle yet notable increase compared to the preceding months. This trend of rising wind speeds begins in late April and continues through June, creating a consistent pattern where autumn gives way to invigorating breezes. The gentle winds of May are part of a larger climatic rhythm, as the region's winds typically fluctuate between 2.5 m/s and 3.7 m/s throughout the year, but May stands out for its fresh energy, setting the stage for an exciting transition into the drier months ahead. The steady winds not only enhance the region's natural beauty but also create perfect conditions for outdoor activities and exploring the stunning landscapes.

Average May Wind Speed in San Martin

The chart displays monthly wind speed patterns in San Martin, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.13.32.53.33.5 m/s3.53.43.73.73.73.53.5
Data source: San Martin May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in San Martin Compares to Other Months

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

May and January present distinct weather patterns, with January experiencing slightly warmer temperatures overall. In January, the minimum temperature is 19°C (67°F), rising to an average of 26°C (78°F), and peaking at 35°C (94°F), whereas May has a minimum of 16°C (62°F) and a maximum of 33°C (91°F). Precipitation levels are higher in January, with 20 mm (0.8 in) falling over the same number of days as May, which sees only 13 mm (0.5 in) of rain. Both months share a high humidity level of 89%, contributing to a tropical feel. For more detailed information on January weather, you can visit San Martin weather in January.

In comparing the weather of May and February, we see some notable differences. February tends to be warmer, with average temperatures ranging from a minimum of 20°C (68°F) to a maximum of 35°C (96°F), while May presents a cooler range with minimums of 16°C (62°F) and maximums of 33°C (91°F). However, February also experiences significantly more rainfall, averaging 65 mm (2.5 in) over 9 days compared to May's much drier 13 mm (0.5 in) over just 4 days. Humidity levels remain fairly similar, with February at 87% and May slightly higher at 89%. For more detailed insights on February's weather, you can visit San Martin weather in February.

In comparing the weather of May and March, March tends to be warmer overall, with average temperatures ranging from a minimum of 21°C (69°F) to a maximum of 36°C (96°F). In contrast, May experiences milder temperatures, with a minimum of 16°C (62°F) and a maximum of 33°C (91°F). Furthermore, March is significantly wetter, receiving 157 mm (6.2 in) of precipitation over 9 days, compared to May’s minimal rainfall of just 13 mm (0.5 in) over 4 days. Humidity levels are fairly similar in both months, with May at 89% and March at 87%. For a deeper look at the climate of March, you can visit San Martin weather in March.

In comparing the weather between April and May, April tends to be slightly warmer, with an average temperature of 25°C (78°F) and a maximum reaching up to 35°C (95°F). May, on the other hand, shows a decrease in maximum temperatures, peaking at 33°C (91°F), and averages 24°C (75°F). Precipitation is also notably less in May, with only 13 mm (0.5 in) over 4 days compared to April's 33 mm (1.3 in) across 5 days. Humidity levels remain fairly similar, with May at 89% and April at 86%. For more detailed insights into April's weather, you can view San Martin weather in April.

In May, temperatures range from a minimum of 16°C (62°F) to a maximum of 33°C (91°F), with an average of 24°C (75°F). The month experiences relatively high humidity at 89% and sees about 13 mm (0.5 in) of precipitation spread over 4 days. In contrast, June features slightly warmer nights with a minimum temperature of 17°C (63°F) and a cooler daytime average of 22°C (72°F), reaching a maximum of 31°C (88°F). Precipitation drops to just 6 mm (0.2 in) over only 2 days, and humidity decreases to 84%. For more details on the weather conditions, check out San Martin weather in June.

In May, the weather is noticeably warmer, with average temperatures reaching 24°C (75°F) and maximums rising as high as 33°C (91°F). Humidity is high at 89%, contributing to a more tropical feel, accompanied by 13 mm (0.5 in) of precipitation over about four days. In contrast, July offers cooler conditions, with an average temperature of 21°C (70°F) and maximums peaking at 28°C (82°F). This month experiences significantly less precipitation, only 4 mm (0.1 in) over just one day, and lower humidity at 71%. For more specific insights on July weather in San Martin, you can check this link: San Martin weather in July.

In May, the weather is generally warmer and more humid, with average temperatures ranging from a minimum of 16°C (62°F) to a maximum of 33°C (91°F) and an average humidity level of 89%. The month experiences moderate rainfall, with about 13 mm (0.5 in) over four days. In contrast, August sees cooler temperatures, with averages between 15°C (59°F) and 28°C (83°F) and significantly less humidity at 71%. Notably, August is drier, boasting only 2 mm (0.1 in) of precipitation over zero rainy days. For a more detailed view of August weather, you can check San Martin weather in August.

May and September present distinct contrasts in weather. May generally enjoys warmer temperatures, with an average of 24°C (75°F) and a maximum of 33°C (91°F), while September sees a cooler average of 21°C (69°F) and a maximum of 29°C (85°F). Additionally, May experiences higher humidity at 89% and some precipitation, totaling 13 mm (0.5 in) over four days. In contrast, September remains quite dry, with only 3 mm (0.1 in) of rainfall recorded and no rainy days, leading to a more comfortable humidity level of 75%. For further details on September's climate, you can visit San Martin weather in September.

May and October exhibit noticeable differences in weather patterns. In May, temperatures range from a minimum of 16°C (62°F) to a maximum of 33°C (91°F), with an average of 24°C (75°F). The month sees higher humidity at 89% and moderate rainfall, totaling 13 mm (0.5 in) over four days. In contrast, October presents a slightly cooler atmosphere, with temperatures ranging from 16°C (61°F) to a maximum of 30°C (86°F), and an average of 21°C (70°F). This month is characterized by lower precipitation at just 10 mm (0.4 in) over only two days and a decrease in humidity to 77%. For a more detailed look at October weather, visit San Martin weather in October.

In comparing the weather of May and November, we find some notable differences and similarities. May enjoys slightly warmer temperatures, with an average of 24°C (75°F) and highs reaching 33°C (91°F), whereas November's averages are cooler at 22°C (71°F), peaking at 31°C (88°F). Both months experience low levels of precipitation, with May receiving 13 mm (0.5 in) over 4 days and November seeing a marginally higher 14 mm (0.6 in) over just 3 days. Humidity levels are higher in May at 89%, compared to November's 79%, making May feel a bit more tropical. For a detailed look at the weather in November, you can check out San Martin weather in November.

In May, temperatures range from a minimum of 16°C (62°F) to a maximum of 33°C (91°F), with an average of 24°C (75°F). The month sees relatively low precipitation, totaling 13 mm (0.5 in) over just 4 days, paired with high humidity at 89%. In contrast, December experiences slightly warmer temperatures, with a minimum of 17°C (63°F) and a maximum of 32°C (91°F), while still averaging at 24°C (75°F). However, December is characterized by increased rainfall, accumulating 29 mm (1.2 in) over 7 days, accompanied by marginally lower humidity at 86%. For more detailed insights, check out San Martin weather in December.

Compare San Martin's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in San Martin

As May arrives in San Martin, the weather begins to shift towards warmer temperatures, offering a delightful respite from the cooler months. With a maximum temperature reaching a comfortable 33°C (91°F) and an average of 24°C (75°F), outdoor activities become increasingly inviting. However, occasional light rain—with just 4 days of precipitation—adds to the region's lush landscape without significantly impacting plans. The humidity, while still notably high at 89%, often provides a refreshing touch, making the air feel alive. As a transitional month, May serves as a bridge to the more intense heat of the upcoming summer, creating a perfect blend of warmth and freshness. To learn more about what to expect throughout the year, check out the full details on San Martin Climate.