Last updated: August 28, 2025
In May, Hoi An, Vietnam, experiences a tropical climate characterized by warm temperatures and significant humidity. Daytime highs can reach a scorching 36°C (96°F), while the average temperature hovers around a balmy 29°C (84°F). Evenings cool to a comfortable 23°C (74°F), making them perfect for leisurely strolls. However, this month also brings frequent rain, with precipitation totals reaching 108 mm (4.3 in) over approximately 14 days. Humidity levels remain high at about 80%, adding to the tropical ambiance of this enchanting destination. Plan accordingly to make the most of your visit!
In May, Hoi An experiences a noticeable rise in temperatures as the region transitions into summer. With minimums averaging 23°C (74°F) and peaking at an impressive 36°C (96°F), this month marks one of the warmest times of the year. The average temperature settles at a comfortable 29°C (84°F), inviting visitors to bask in the sun while exploring the town's vibrant culture and scenic landscapes. As May unfolds, the humidity also increases, enhancing the tropical feel that characterizes this enchanting Vietnamese destination. This trend of rising warmth continues into June, making May the ideal month for those who relish the heat but prefer to avoid the peak summer crowds.
May in Hoi An, Vietnam, sees a shift in the weather pattern, as the city experiences 108 mm (4.3 in) of precipitation over 14 days. This marks an increase from the preceding months of April and March, which received significantly lower amounts of rainfall. As temperatures rise, May becomes a transitional month, hinting at the wet season ahead. The rain, while frequent, is relatively moderate compared to the downpours that follow in the latter half of the year, particularly in October and November, where totals soar to a staggering 533 mm (21.0 in) and 596 mm (23.5 in), respectively. Visitors in May can expect a mix of sunny and rainy days, perfect for enjoying Hoi An's lush landscapes while still being prepared for occasional showers.
In May, Hoi An experiences a notable shift in humidity, settling at around 80%. This level marks a slight increase from the drier months of February and April, creating a more tropical ambience as the region transitions into the summer months. As temperatures rise, the humidity begins to climb again, laying the groundwork for the muggy conditions that will dominate June and July, both of which see humidity peak at 85%. While May offers a taste of the approaching humidity, it is still relatively manageable compared to the later summer months, when the air feels thick with moisture, reaching heights of 87% to 91% in the fall. Transitioning from this mild humidity in May to the more intense levels ahead captures the essence of Hoi An's lush, vibrant environment as it bursts into summer.
In May, Hoi An, Vietnam continues to experience extreme UV exposure, maintaining a UV Index of 14. With a burn time of just 10 minutes, it's essential to stay vigilant under the sun as the intensity remains high, reminiscent of the previous months leading up to May. This pattern is consistent, as both April and June also showcase similar extreme levels, making sun protection vital during this time. As summer approaches, outdoor enthusiasts should prepare accordingly and consider utilizing protective measures to enjoy the beautiful weather safely. For more detailed information, explore the Hoi An UV Index.
UV Risk Categories
As May rolls in, Hoi An basks in the warm embrace of sunshine, boasting an impressive 329 hours of sunlight—its peak for the year. This month marks a delightful continuation of the increasing brightness that begins in January with only 210 hours. After a steady climb through the spring, peaking in May, the sunshine dwindles slightly in the summer months of June and July, which still offer a substantial 315 hours and 317 hours respectively. The city's vibrant landscapes come alive in May, making it an ideal time for visitors to explore its ancient streets and riverside charm, before the sun begins to gradually retreat as autumn approaches. With each hour of sunlight, Hoi An transforms, inviting all to experience its luminous beauty.
As May rolls into Hoi An, the promise of sunnier days becomes more apparent, with a 49% chance of sunshine—a slight uptick compared to the preceding months of April and March, which hover around 47% and 48%, respectively. This trend hints at the arrival of warmer weather, making May an inviting time to explore the city's vibrant culture and stunning landscapes. Interestingly, as the region transitions into the summer months, the likelihood of sunny spells dips in June and July, suggesting that May might offer one of the last opportunities for relatively consistent sunshine before the monsoon season begins. For those yearning to soak up the sun, May presents an excellent window to enjoy Hoi An’s enchanting charm.
In Hoi An, Vietnam, the daylight duration reveals a captivating rhythm throughout the year. From January to April, the daylight maintains a steady 11 to 12 hours, inviting visitors to bask in the golden glow. By May, the daylight stabilizes at 12 hours, creating a perfect backdrop for exploration and relaxation. As summer approaches in June, daylight peaks at an inviting 13 hours, filling the days with warmth and vibrancy. Interestingly, the following months, from July to September, see a return to 12 hours, offering a consistent brightness. As the year winds down in October through December, daylight gradually diminishes to 11 hours, signaling the seasonal shift while still providing ample time to enjoy the charm of this beautiful coastal town. This gradual ebb and flow of light not only enhances the scenic beauty of Hoi An but also sets the stage for memorable adventures year-round.
May in Hoi An often brings a gentle breeze, with an average wind speed of 2.8 m/s (6 mph), slightly more than the calmer months of February and April. As the region transitions into the summer months, wind speeds tend to decrease, hitting their lowest point in June at 2.1 m/s (5 mph). However, May serves as a delightful prelude to the lively winds of the later months, with October and November showcasing stronger gusts at 3.3 m/s (7 mph) and 3.5 m/s (8 mph), respectively. This pattern highlights how the gentle winds of May make for a** perfect backdrop** to explore Hoi An's charming streets before the summer heat sets in.
Weather in Hoi An varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Hoi An, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present contrasting weather patterns. In May, temperatures are generally warmer, with a minimum of 23°C (74°F) and an average of 29°C (84°F), reaching highs of 36°C (96°F). The month also sees significant rainfall, with 108 mm (4.3 in) over about 14 days and humidity levels around 80%. In contrast, January offers milder conditions with a minimum temperature of 16°C (61°F) and an average of 22°C (73°F), peaking at 28°C (84°F). January experiences more precipitation at 161 mm (6.4 in) spread over 19 days, along with slightly higher humidity at 86%. For more detailed insights, you can check Hoi An weather in January.
In comparing the weather between May and February, it's clear that May is significantly warmer, with average temperatures reaching up to 29°C (84°F) and highs of 36°C (96°F) compared to February’s moderate average of 22°C (73°F) and maximums of 30°C (85°F). Additionally, May experiences more rainfall, totaling 108 mm (4.3 in) over 14 days, while February has less precipitation at 84 mm (3.3 in) over 12 days. Despite May's higher temperatures, humidity levels remain similar, with May at 80% and February slightly higher at 83%. For a detailed look at the weather specifics in February, you can refer to Hoi An weather in February.
In comparing the weather between March and May, it is evident that May is significantly warmer, with average temperatures reaching 29°C (84°F) compared to March's average of 25°C (77°F). The maximum temperatures in May can soar up to 36°C (96°F), while March's highest is more moderate at 31°C (89°F). Additionally, May experiences a higher level of precipitation, with 108 mm (4.3 in) over about 14 days, compared to 80 mm (3.2 in) across 11 days in March. Humidity is also slightly higher in May at 80%, versus 78% in March. For more details about the weather during this time, you can visit Hoi An weather in March.
In comparing the weather between April and May, May tends to be warmer, with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 36°C (96°F), while April sees slightly cooler temperatures, with a minimum of 20°C (69°F) and a maximum of 34°C (94°F). Additionally, May is wetter, receiving an average of 108 mm (4.3 in) of precipitation over 14 days, compared to April’s 79 mm (3.1 in) over 10 days. Humidity levels also rise slightly in May, reaching 80%, compared to 75% in April. For more specific details on April weather, check out Hoi An weather in April.
May and June both showcase warm temperatures, but June tends to be slightly hotter overall. In May, the temperature ranges from a minimum of 23°C (74°F) to a maximum of 36°C (96°F), with an average of 29°C (84°F). In contrast, June has a minimum temperature of 26°C (78°F) and can reach up to 37°C (98°F), with an average temperature of 30°C (87°F). While May experiences more precipitation, with 108 mm (4.3 in) over 14 days, June sees a decrease in rainfall, totaling 69 mm (2.7 in) across 13 days. Humidity levels remain high in both months, at 80% in May and 85% in June. For more details on the weather conditions in June, you can visit Hoi An weather in June.
In May, the weather features temperatures ranging from a minimum of 23°C (74°F) to a maximum of 36°C (96°F), with an average temperature of 29°C (84°F). However, May also brings significant rainfall, totaling 108 mm (4.3 in) over 14 days, accompanied by high humidity levels of 80%. In contrast, July sees slightly warmer temperatures, with a minimum of 26°C (79°F) and an average of 30°C (86°F), while still reaching the same maximum of 36°C (97°F). Precipitation increases in July, amounting to 146 mm (5.8 in) across 18 days, and humidity rises to 85%. For more details about July's weather in Hoi An, visit Hoi An weather in July.
In May, the weather in Hoi An typically features a minimum temperature of 23°C (74°F) and an average of 29°C (84°F), reaching highs of 36°C (96°F). This month experiences approximately 108 mm (4.3 in) of rainfall over 14 days, coupled with a humidity level of around 80%. In contrast, August sees slightly warmer temperatures, with minimums at 25°C (78°F) and an average of 30°C (86°F), while still peaking at 36°C (97°F). The precipitation increases to 142 mm (5.6 in), distributed across 19 rainy days, and humidity rises to 87%. For more details on Hoi An's weather during this month, you can check Hoi An weather in August.
May and September present distinct weather patterns in terms of temperature and precipitation. In May, temperatures range from a minimum of 23°C (74°F) to a maximum of 36°C (96°F), with an average of 29°C (84°F), while September sees slightly higher minimum temperatures at 25°C (77°F) and a lower maximum of 34°C (94°F), maintaining the same average of 29°C (84°F). However, September is significantly wetter, with precipitation reaching 246 mm (9.7 in) over 23 days compared to May's 108 mm (4.3 in) across 14 days. Additionally, humidity is higher in September at 88%, compared to May's 80%. For more specific insights about the weather in September, check out Hoi An weather in September.
May and October in Hoi An present quite contrasting weather patterns. In May, temperatures range from a comfortable 23°C (74°F) to a hot 36°C (96°F), with an average of 29°C (84°F). However, rainfall during this month totals 108 mm (4.3 in) over approximately 14 days, and humidity is around 80%. In stark contrast, October experiences a cooler average temperature of 27°C (80°F), with maximums reaching 32°C (90°F). Yet, it is significantly wetter, receiving 533 mm (21.0 in) of precipitation over 25 days and higher humidity at 90%. For more detailed information, you can check out Hoi An weather in October.
May and November present distinct weather patterns, highlighting the transition from the warmer pre-monsoon season to the rainy season in Hoi An. In May, temperatures generally range from a minimum of 23°C (74°F) to a maximum of 36°C (96°F), accompanied by relatively high humidity levels of 80%. However, it only sees about 108 mm (4.3 in) of precipitation over 14 days. In contrast, November is cooler, with average temperatures between 21°C (71°F) and 30°C (85°F), yet it experiences significant rainfall, totaling 596 mm (23.5 in) and occurring over 23 days. This month also has a higher humidity level of 91%, creating a more humid atmosphere. For more details on the weather in this month, you can check Hoi An weather in November.
May and December present contrasting weather conditions. In May, temperatures range from a minimum of 23°C (74°F) to a maximum of 36°C (96°F), with an average of 29°C (84°F), and the month sees about 108 mm (4.3 in) of precipitation spread over 14 days. The humidity is relatively high at 80%, contributing to a warm and somewhat oppressive atmosphere.
In contrast, December experiences cooler temperatures, with a minimum of 18°C (64°F) and a maximum of 28°C (83°F), averaging 23°C (73°F). However, it is considerably wetter, with precipitation reaching 355 mm (14.0 in) over 24 days, and the humidity is even higher at 89%. This leads to a more humid and damp climate during December. For more details, check out Hoi An weather in December.
As May unfolds in Hoi An, visitors can expect warm temperatures that range dramatically, with daytime highs peaking around 36°C (96°F) and nighttime lows dropping to a mild 23°C (74°F). This month sets itself apart from others with a notable increase in humidity, hovering around 80%, which can make the heat feel more intense. Rain is also more frequent, with up to 14 rainy days contributing to a total precipitation of 108 mm (4.3 in), setting the stage for lush landscapes. For those looking to understand the nuances of Hoi An's climate throughout the year, be sure to check Hoi An Climate to compare how May’s weather stands out.