Last updated: April 22, 2025
In May, Sinaloa, Mexico experiences warm and dynamic weather, characterized by a maximum temperature soaring to 39°C (102°F) and an average of 27°C (81°F). The minimum temperature typically settles around 19°C (66°F), providing a comfortable reprieve during the cooler nights. However, this month also brings considerable rainfall, with 97 mm (3.8 in) accumulated over 17 days, resulting in a humidity level of 65%. Visitors can expect a mix of sunny spells and intermittent showers, making it essential to prepare for both heat and humidity while enjoying the vibrant beauty of the region.
In May, Sinaloa, Mexico, experiences a warm and inviting climate, with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 39°C (102°F). The average temperature settles at a comfortable 27°C (81°F), ideal for outdoor activities and soaking up the sun. This month marks a noticeable shift from the cooler spring temperatures of April, with both minimum and average temperatures rising. As the region transitions into summer, residents and visitors alike can look forward to longer, sunnier days, making it a perfect time to explore Sinaloa’s stunning beaches and vibrant culture.
In May, Sinaloa experiences a significant uptick in precipitation, with 97 mm (3.8 in) of rainfall recorded over the month, making it one of the wettest periods of the year. This surge is highlighted by a dramatic increase in the number of rainy days—a striking 17 days—which marks a stark contrast to the drier months preceding it. While April saw only 12 mm of rain over just 2 days, May's wetter conditions set the stage for the intensification of the rainy season that peaks in June with even more substantial precipitation. The transition from the relatively arid early months to the lush and vibrant atmosphere of late spring showcases how crucial May is for replenishing the region's water resources, as the verdant landscapes emerge in anticipation of summer storms.
As May arrives in Sinaloa, the humidity begins to gradually rise, reaching 65%, a noticeable increase compared to the drier months of March and April. This shift marks the onset of more humid conditions that will characterize the coming summer months. Following May, the humidity slightly elevates in June before soaring in July and August, where levels peak at around 75% and 82%, respectively. This pattern indicates a transition from the cooler, dryer early months of the year towards the more tropical climate typical of the region's summer, making May a key month of change in Sinaloa's weather rhythm.
In May, Sinaloa experiences a remarkably high UV Index of 14, categorized as extreme, indicating that sun protection is essential with a burn time as short as 10 minutes. This trend mirrors the preceding months of April and March, which also recorded the same elevated index, emphasizing the region's persistent exposure to intense sunlight as it heads into the summer months. Throughout the year, Sinaloa's UV Index peaks consistently during the warmer months, peaking at 15 in July, suggesting that locals and visitors alike should remain vigilant about sun safety. For a detailed overview of UV levels and recommendations, check out Sinaloa UV Index.
UV Risk Categories
In Sinaloa, Mexico, May shines as a splendid bridge between spring and summer, boasting 315 hours of sunshine. The sunshine trend in Sinaloa reveals a steady increase from the beginning of the year, with January starting at 253 hours and climbing through the months. Although April experienced a slight dip to 314 hours, May regains its bright momentum, similar to the sun-soaked July, which records the highest at 326 hours. This consistent display of sunlight not only enhances the picturesque landscapes but also invites locals and travelers alike to revel in the outdoor splendor, marking May as a particularly delightful time to soak up the rays before the summer heat fully sets in.
In Sinaloa, Mexico, the likelihood of sunny weather experiences a notable decline as spring transitions into summer. Starting with a robust 63% chance of sun in January, the probability peaks in February at 88%, then remains relatively high through March (83%) before dipping significantly to 57% in April. However, by May, the odds drop sharply to just 36%, indicating a shift towards the cloudier, wetter conditions of summer. This trend continues into June, where the chances plummet further to 18%, marking the onset of the rainy season. Those planning activities in May should be prepared for a higher likelihood of overcast skies, contrasting sharply with the sun-soaked earlier months.
As the year unfolds in Sinaloa, Mexico, daylight duration experiences subtle yet notable shifts, particularly during the spring and summer months. From January through April, daylight lingers at a consistent 11 to 12 hours, inviting the warmth of springtime. In May, the daylight remains steady at 12 hours, creating perfect conditions for outdoor activities. As the days extend into June, Sinaloa basks in an abundance of 13 hours of daylight, maximizing opportunities for adventures under the sun. Following this peak, the daylight gradually tapers to 12 hours again from July to September, before returning to 11 hours as the year draws to a close in October through December. This cyclical pattern not only enriches the local culture but also harmonizes with the vibrant lifestyle of its residents, making Sinaloa an inviting destination year-round.
In May, Sinaloa experiences a gentle breeze with an average wind speed of 1.4 m/s (3 mph), marking a subtle dip from the slight uptick seen in previous months. This trend of moderate winds is part of a pattern that showcases the region's climate—while the winter months bring higher wind speeds, the summer starts to settle into a calm rhythm. As temperatures rise and the humidity increases, the winds shift to create a more tranquil atmosphere, perfect for enjoying the lush landscapes and vibrant surroundings. Interestingly, June follows with even lighter winds, suggesting that the stillness is a hallmark of the season in Sinaloa, inviting locals and visitors alike to relish in the beauty of this coastal paradise.
The weather in Sinaloa 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 Sinaloa and find detailed weather information for every month.
May and January present contrasting weather patterns. In May, temperatures range from a minimum of 19°C (66°F) to a scorching maximum of 39°C (102°F), with an average of 27°C (81°F). This month experiences significant precipitation, with 97 mm (3.8 in) spread over 17 days, contributing to a humidity level of 65%.
In contrast, January sees milder temperatures, with a minimum of 11°C (52°F) and a maximum of 34°C (93°F), averaging 22°C (73°F). The month is characterized by low precipitation, accumulating only 9 mm (0.4 in) over just 2 days, and a higher humidity level of 76%. For a closer look at January weather in the region, you can check Sinaloa weather in January.
In comparing the weather between May and February, it's clear that May is significantly warmer, with average temperatures reaching 27°C (81°F) compared to February's more moderate 24°C (75°F). The maximum temperatures in May can soar up to 39°C (102°F), while February peaks at a more manageable 36°C (97°F). Precipitation also differs greatly, with May experiencing 97 mm (3.8 in) over 17 days, highlighting a much wetter climate, whereas February sees only a minimal 5 mm (0.2 in) of rain across just one day. Despite the slight increase in humidity in February at 68%, May's humidity averages 65%, indicating that both months maintain a relatively comfortable feel. For a more detailed look at February weather, visit Sinaloa weather in February.
In comparing the weather between March and May, it’s clear that May tends to be warmer and more humid. In March, temperatures range from a minimum of 15°C (58°F) to a maximum of 38°C (100°F), with an average temperature of 25°C (78°F) and almost no precipitation. In contrast, May sees higher temperatures, with a minimum of 19°C (66°F), an average of 27°C (81°F), and a maximum reaching up to 39°C (102°F). Additionally, May experiences significantly more precipitation, totaling 97 mm (3.8 in) over 17 days, compared to March, which has only 4 mm (0.2 in) with no recorded rainy days. The humidity is also slightly higher in May at 65%, compared to March's 59%. For more detailed information on March weather, you can check Sinaloa weather in March.
In April, the weather in Sinaloa is characterized by mild temperatures, with a minimum of 16°C (60°F) and an average of 27°C (81°F), mirroring the highs of 39°C (102°F). However, April boasts significantly lower precipitation at only 12 mm (0.5 in) over just 2 days, and a humidity level of 57%. In contrast, May sees warmer conditions with a minimum temperature of 19°C (66°F) while maintaining the same average and maximum temperatures as April. However, May is much wetter, receiving 97 mm (3.8 in) of rainfall over 17 days and a higher humidity of 65%. These differences highlight the transition from the relatively dry and mild conditions of April to the wetter and slightly warmer atmosphere of May. For more details, visit Sinaloa weather in April.
May and June exhibit notable differences in weather patterns. May features higher average temperatures, peaking at around 39°C (102°F) and averaging 27°C (81°F), while June sees a cooler average of 25°C (78°F) and a maximum of 35°C (96°F). Rainfall increases significantly in June, with total precipitation reaching 223 mm (8.8 in) over 23 days, compared to May's 97 mm (3.8 in) over 17 days. Both months maintain similar humidity levels, with May at 65% and June slightly higher at 66%. For a more detailed overview of June's climate, visit Sinaloa weather in June.
In comparing the weather between May and July, May tends to be warmer on average, with temperatures reaching a maximum of 39°C (102°F) compared to July's maximum of 38°C (100°F). However, July experiences higher humidity at 75% compared to May's 65%, making it feel a bit stickier. Precipitation levels also vary significantly, with May receiving 97 mm (3.8 in) over 17 days, while July sees only 48 mm (1.9 in) across 7 days. For more details on July's weather, you can check Sinaloa weather in July.
May and August weather present some notable differences in temperature and humidity. In May, temperatures range from a minimum of 19°C (66°F) to a maximum of 39°C (102°F), with an average temperature of 27°C (81°F). The month experiences approximately 97 mm (3.8 in) of precipitation over 17 days, accompanied by a humidity level of 65%. In contrast, August sees slightly cooler temperatures, with a minimum of 18°C (65°F) and a maximum of 37°C (99°F), averaging 26°C (79°F). Precipitation increases to 106 mm (4.2 in), spread over 15 days, and humidity rises to 82%. This shift in weather patterns highlights a trend towards cooler temperatures and increased moisture as the summer progresses. For more details, check out Sinaloa weather in August.
In May, the weather is typically warm with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 39°C (102°F), averaging around 27°C (81°F). The month sees a moderate amount of rainfall, averaging 97 mm (3.8 in) over 17 days, alongside a humidity level of 65%. In contrast, September presents slightly cooler temperatures, with a minimum of 18°C (66°F) and a maximum of 36°C (96°F), averaging at 25°C (77°F). However, September is much wetter, receiving 212 mm (8.4 in) of precipitation over 21 days and with increased humidity at 82%. For more detailed information, visit Sinaloa weather in September.
May and October showcase distinct weather patterns. May typically experiences warmer temperatures, with lows around 19°C (66°F) and highs reaching up to 39°C (102°F), averaging 27°C (81°F). In contrast, October offers milder warmth, with minimum temperatures of 17°C (63°F) and maximums around 34°C (94°F), landing at an average of 24°C (76°F). Precipitation is also more pronounced in October, with 197 mm (7.8 in) over 18 days compared to May's 97 mm (3.8 in) over 17 days. Additionally, October tends to be more humid, with humidity levels climbing to 83% versus May's 65%. For more details on October's climate, you can check Sinaloa weather in October.
May and November present contrasting weather patterns. In May, the temperatures range from a minimum of 19°C (66°F) to a scorching maximum of 39°C (102°F), with an average of 27°C (81°F). This month also sees considerable precipitation, totaling 97 mm (3.8 in) spread over 17 days, contributing to a humidity level of 65%. In stark contrast, November offers cooler temperatures with a minimum of 14°C (57°F) and a maximum of 34°C (93°F), averaging 24°C (75°F). This month experiences significantly less rainfall, with just 37 mm (1.5 in) over 6 days, while humidity rises to 80%. For more insights into November weather, visit Sinaloa weather in November.
May and December present contrasting weather patterns. In May, temperatures range from a minimum of 19°C (66°F) to a scorching maximum of 39°C (102°F), with an average of 27°C (81°F). The month is marked by significant precipitation, totaling 97 mm (3.8 in) over 17 days, alongside a humidity level of 65%. In contrast, December offers milder temperatures, with a minimum of 12°C (55°F), an average of 23°C (73°F), and a maximum of 34°C (93°F). Furthermore, December experiences much less rainfall, with just 15 mm (0.6 in) over 3 days, and higher humidity at 76%. For a deeper look into December's climate, check out this link: Sinaloa weather in December.
As May unfolds in Sinaloa, it heralds a transition that's markedly different from the cooler months that precede it. With temperatures climbing to a maximum of 39°C (102°F) and a humid atmosphere lingering around 65%, the warmth becomes palpable, inviting beachgoers and outdoor enthusiasts alike to embrace the sun. While the region experiences some rainfall, with about 97 mm over approximately 17 days, this increase in precipitation signifies the impending arrival of the summer season, setting the stage for lush landscapes. For more insights into how May weather fits into Sinaloa's broader climatic narrative, explore Sinaloa Climate.