May Weather in Monterrey, Mexico

Last updated: April 22, 2025

May in Monterrey, Mexico, ushers in a warm embrace with maximum temperatures soaring to 40°C (105°F) and an average of 26°C (79°F), creating an inviting climate for outdoor adventures. The month tends to be a bit humid, with humidity levels reaching 66%, making it essential to stay hydrated. Although the sun shines brightly, occasional rain adds to the charm, bringing around 72 mm (2.8 in) of precipitation over 10 days. Ideal for enjoying both rain-soaked greenery and sunny outings, May is a vibrant time to experience the natural beauty and culture of Monterrey.

May Temperature in Monterrey

In Monterrey, Mexico, May marks a transition into the sweltering summer months, with temperatures starting to rise significantly. The average temperature reaches a comfortable 26°C (79°F), but highs soar to a sizzling 40°C (105°F), making it one of the hottest months of the year. Nights offer a refreshing reprieve, with lows around 15°C (59°F). This month exemplifies a trend of escalating warmth, as Monterrey experiences rapid increases in temperature, following the mild spring months of April. As residents and visitors alike brace for the heat, outdoor activities take on a vibrant energy, setting the stage for lively summer gatherings under the brilliant Mexican sun.

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

The chart illustrates May temperature patterns in Monterrey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec576268737881828378726460
Data source: Temperature data for Monterrey 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 Monterrey

In Monterrey, Mexico, the month of May marks a notable increase in precipitation, recording 72 mm (2.8 in) of rainfall over 10 days. This rainfall is a significant jump from April's 48 mm (1.9 in), illustrating a shift as the region transitions deeper into the rainy season. As temperatures rise, May serves as a turning point, where the frequency of rain not only enhances the landscape but also sets the stage for the downpours to follow in the upcoming months. Notably, this uptick in precipitation foreshadows June’s substantial 56 mm (2.2 in), providing a rich contrast to the driest months earlier in the year. The consistent pattern of increased rainfall suggests an emerging climatic rhythm, highlighting May’s role as a pivotal month in Monterrey's weather cycle.

May Precipitation Trends in Monterrey

The chart displays monthly precipitation patterns in Monterrey, 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.
JanFebMarAprMayJunJulAugSepOctNovDec292036487256719104523226
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Monterrey

In May, Monterrey experiences a notable shift in humidity, settling at 66%, slightly above April's 59% but lower than its peak earlier in the year. This month marks a transitional period as humidity levels gradually climb from the dry, breezy conditions of April, signaling the approaching summer. Interestingly, while May may feel more humid compared to previous months, it remains milder than the summer months ahead, such as June and July, which typically see higher humidity levels of 71% and 57%, respectively. As the year progresses, the humidity in Monterrey tends to rise, reaching its pinnacle in the later months, with October and November showing significant dampness at 76% and 81%. This trend illustrates a clear pattern of increased humidity as the seasons transition, making May a month of changing conditions that hints at the warmer, more humid summer days to come.

May Average Humidity in Monterrey

This chart illustrates the average monthly humidity levels in Monterrey, 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.
JanFebMarAprMayJunJulAugSepOctNovDec75%70%65%59%66%71%57%58%73%76%81%80%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Monterrey

In Monterrey, Mexico, the UV Index experiences a significant surge as spring transitions into summer. By May, the index holds steady at an extreme level of 13, much like the preceding months of April and the following months of June and July. This consistent reading signifies an urgent need for protection against harmful UV rays, as the recommended burn time drops to just 10 minutes. These extreme conditions, characterized by minimal variation, illustrate a trend where outdoor enthusiasts should prioritize sun safety measures. As the year progresses, the UV Index follows a similar pattern, remaining high into the summer months before gradually tapering down in the fall. For more detailed insights, check the Monterrey UV Index.

Maximum UV Index Levels in Monterrey for May

The chart shows the monthly maximum UV Index (UVI) for Monterrey 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.
JanFebMarAprMayJunJulAugSepOctNovDec79111313131312121186
Data source: Monterrey 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 Monterrey

As May unfolds in Monterrey, Mexico, the city basks in a delightful 336 hours of sunshine, marking it as one of the sunniest months of the year. This trend of increasing daylight begins in January with 208 hours, steadily climbing through the first half of the year. Notably, the sunshine peaks during the summer, highlighting Monterrey's transition from spring to a vibrant summer season. Following May, June also boasts a remarkable 342 hours, showcasing the city’s abundant solar embrace. As the months progress, the sunlight gradually diminishes, yet Monterrey remains a captivating destination, illuminated by its rich warmth even as autumn approaches.

Monthly Sunshine Duration in Monterrey: May Highlighted

The May sunshine duration represents the total number of hours Monterrey 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.
JanFebMarAprMayJunJulAugSepOctNovDec208h255h294h303h336h342h339h346h283h293h265h267h
Data source: Monterrey May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Monterrey During May

As May approaches in Monterrey, Mexico, the chances of sunny weather dip slightly to 55%, marking one of the lower probabilities for the first half of the year. While the city enjoys a modest likelihood of sunshine, this month contrasts with the sunnier April, which boasts a 56% chance, and precedes a more promising June at 59%. Notably, the trend shows that the spring months tend to have fluctuating sunshine opportunities, with January, March, and August each exceeding 60%. Thus, although May may not shine as brightly as other months, it certainly retains its share of sunny moments before the summer heat fully sets in.

Percentage of Sunny Days in May in Monterrey

The chart illustrates the percentage of sunny days in Monterrey 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 Monterrey experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec62%59%62%56%55%59%45%62%58%61%59%58%
Data source: Monterrey May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Monterrey in May

In Monterrey, Mexico, May ushers in a delightful increase in daylight, providing residents and visitors with 13 hours of sunlight—the highest for the month. This trend of gradually lengthening days begins in January with just 10 hours and progresses through February and March, reaching 12 hours in both April and May. Following this peak, daylight remains consistent at 13 hours in June and July before slowly tapering off in the later months. By August, daylight decreases to 12 hours, continuing to diminish as fall approaches, illustrating a natural rhythm of seasons where every month brings a unique relationship with the sun.

Average Daylight Hours in Monterrey for May

The chart illustrates the variation in daylight duration in Monterrey throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 43m11h 17m12h 1m12h 46m13h 24m13h 42m13h 32m12h 58m12h 15m11h 30m10h 52m10h 33m
Data source: Monterrey daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Monterrey

In May in Monterrey, Mexico, the weather follows a gentle pattern with an average wind speed of 2.6 m/s (6 mph), consistent with the preceding month of April. This moderate breeze sets a pleasant atmosphere as the region transitions into warmer summer months. Notably, May’s wind speed mirrors that of March, suggesting a brief slowing before the summer heat begins to dominate. Following May, the wind begins to taper off slightly as June rolls in. Overall, the winds in May reflect a harmonious balance of calmness and warmth, perfect for outdoor activities and enjoying the vibrant landscape of Monterrey.

Average May Wind Speed in Monterrey

The chart displays monthly wind speed patterns in Monterrey, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.02.32.62.52.6 m/s2.22.02.52.01.91.91.7
Data source: Monterrey May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Monterrey Compares to Other Months

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

May and January present contrasting weather patterns in Monterrey. In May, temperatures can soar from a minimum of 15°C (59°F) to a scorching maximum of 40°C (105°F), with an average of 26°C (79°F). This month also brings about 72 mm (2.8 in) of precipitation over 10 days, while humidity averages around 66%. In stark contrast, January experiences much cooler temperatures, ranging from a minimum of -2°C (29°F) to a maximum of 33°C (91°F), with an average of 14°C (58°F). Precipitation in January is lighter, totaling only 28 mm (1.1 in) over 4 days, and humidity is slightly higher at 75%. For more details on January's weather, you can visit Monterrey weather in January.

May and February exhibit striking differences in weather patterns. In May, temperatures soar, with a minimum of 15°C (59°F) and an average of 26°C (79°F), reaching a maximum of 40°C (105°F). This month also brings higher precipitation, averaging 72 mm (2.8 in) over 10 days, combined with a humidity level of 66%. In contrast, February experiences much cooler conditions, with temperatures ranging from a minimum of -3°C (27°F) to an average of 16°C (62°F), peaking at 35°C (95°F). Additionally, February sees lower precipitation of 20 mm (0.8 in) over just 4 days, with humidity slightly higher at 70%. For more detailed information, you can check Monterrey weather in February.

May and March exhibit notable differences in weather conditions. In May, temperatures soar with a minimum of 15°C (59°F), peaking at a sweltering 40°C (105°F) and averaging around 26°C (79°F). In contrast, March begins much cooler, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 35°C (95°F) and an average of 20°C (69°F). Additionally, May experiences more precipitation, totaling 72 mm (2.8 in) over approximately 10 days, compared to March’s 36 mm (1.4 in) spread over 7 days. Humidity levels remain relatively similar, standing at 66% in May and 65% in March. For further details, you can check Monterrey weather in March.

In comparing the weather between April and May, it's clear that May experiences more warmth and humidity. The minimum temperature in May rises significantly to 15°C (59°F), compared to April's cooler 7°C (44°F), while the average temperature in May is 26°C (79°F), surpassing April’s average of 23°C (73°F). Additionally, May reaches a maximum temperature of 40°C (105°F), slightly higher than April's peak of 39°C (102°F). Precipitation also increases in May, with 72 mm (2.8 in) recorded over 10 days, compared to April's 48 mm (1.9 in) over 7 days. Furthermore, humidity rises to 66% in May, compared to 59% in April, making the latter month more pleasant overall. For a more detailed look at April's weather, you can visit Monterrey weather in April.

May and June showcase a transition in weather as temperatures begin to rise. In May, the temperatures range from a minimum of 15°C (59°F) to a maximum of 40°C (105°F), with an average of 26°C (79°F). This month sees 72 mm (2.8 in) of precipitation over approximately 10 days, accompanied by a humidity level of 66%. In contrast, June introduces slightly higher minimum and average temperatures, with lows around 18°C (65°F) and an average of 27°C (81°F). The maximum temperature dips slightly to 39°C (103°F), and precipitation decreases to 56 mm (2.2 in) over 7 days, with humidity rising to 71%. For more detailed information, you can check out Monterrey weather in June.

In May, the weather features a broader temperature range with minimums of 15°C (59°F) and maximums reaching up to 40°C (105°F), averaging around 26°C (79°F). This month experiences 72 mm (2.8 in) of precipitation over approximately 10 days and carries a higher humidity level of 66%. In contrast, July sees slightly warmer temperatures, with minimums of 20°C (68°F) and averages of 28°C (82°F), coupled with maximums around 38°C (100°F). Precipitation in July is slightly lower, totaling 71 mm (2.8 in) but occurring over fewer days—only 6. Additionally, humidity decreases to 57%. For more detailed information, you can check out Monterrey weather in July.

In May, the weather in Monterrey is characterized by a broad temperature range, with minimums around 15°C (59°F) and maximums soaring to 40°C (105°F). This month also experiences significant precipitation, averaging 72 mm (2.8 in) over approximately 10 days, along with a humidity level of 66%. In contrast, August typically has milder conditions, with minimum temperatures rising to 20°C (68°F) and average highs of 38°C (100°F). Notably, August sees much less rain, with only 9 mm (0.3 in) falling over just 2 days, and a lower humidity of 58%. For more details, you can check Monterrey weather in August.

May and September in Monterrey exhibit some notable differences in weather patterns. Both months have a similar average temperature of around 26°C (79°F), but May can reach higher maximum temperatures of up to 40°C (105°F), compared to September's peak of 37°C (99°F). Additionally, September experiences more precipitation, with 104 mm (4.1 in) over 10 days, making it wetter than May, which records 72 mm (2.8 in) also over 10 days. The humidity levels are slightly higher in September at 72% compared to 66% in May. For more specific information about weather during this time, check Monterrey weather in September.

In May, the weather is significantly warmer, with temperatures ranging from a minimum of 15°C (59°F) to a scorching maximum of 40°C (105°F) and an average of 26°C (79°F). The month sees an average precipitation of 72 mm (2.8 in) over approximately 10 days, coupled with a humidity level of 66%. In contrast, October offers much colder temperatures, with a minimum of 7°C (45°F), an average of 22°C (72°F), and a maximum of 36°C (97°F). The precipitation decreases to 52 mm (2.0 in) over about 8 days, while humidity rises slightly to 76%. For more detailed information, you can visit Monterrey weather in October.

In May, the weather is characterized by warm temperatures, with a minimum of 15°C (59°F) and an average of 26°C (79°F), soaring up to a maximum of 40°C (105°F). The month is relatively humid with an average humidity of 66% and receives about 72 mm (2.8 in) of precipitation over roughly 10 days. In stark contrast, November experiences much cooler conditions, with a minimum temperature of 0°C (32°F), an average of 18°C (65°F), and a maximum of 32°C (90°F). It also has lower precipitation at 31 mm (1.2 in) across 6 days, while humidity rises to 81%. For more specific details, you can check Monterrey weather in November.

In comparing the weather between May and December, there are significant differences in both temperature and precipitation. May experiences a much warmer climate, with temperatures ranging from a minimum of 15°C (59°F) to a scorching maximum of 40°C (105°F), along with a higher average of 26°C (79°F). This month also sees considerable rainfall, averaging 72 mm (2.8 in) over about 10 days, and a humidity level of 66%.

Conversely, December presents a cooler atmosphere, with temperatures ranging from a chilly 1°C (34°F) to a comfortable maximum of 33°C (92°F) and an average temperature of 16°C (61°F). Precipitation is significantly lower in December, with only 26 mm (1.0 in) falling over 4 days and higher humidity at 80%. For a more detailed look at the weather specifics in December, you can refer to Monterrey weather in December.

Compare Monterrey's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Monterrey

As May unfolds in Monterrey, the city experiences a notable shift in weather, characterized by rising temperatures and increased humidity. This month stands out with its highest average temperatures, making the days feel notably warmer compared to the cooler months preceding it. While May does bring some precipitation, with about ten rainy days, the overall climate becomes more tropical, foreshadowing the intense heat of summer to come. As residents and visitors alike adapt to these warmer conditions, it's essential to stay hydrated and plan outdoor activities accordingly. For more detailed insights on what to expect throughout the year, be sure to check out Monterrey Climate.