Climate and monthly weather forecast
Hoi An, Vietnam

Nestled in Vietnam, Hoi An finds itself under the grasp of a Tropical Monsoon Climate, also known as the Am under the Köppen Climate Classification. The climatic conditions, marked by high temperatures and abundant rainfall, exhibit a certain amount of variation throughout the year. The temperatures hover between 19°C (66.2°F) at their lowest end in January to 33°C (91.4°F) in the peak middle months of June, July and August. The small range of fluctuation in temperatures reveals a hallmark trait of tropical domains.

The presence of monsoons brings with it significant rainfall. Observations suggest that the wettest months fall between September and November, with a significant 297mm (11.69"), 526mm (20.71") and 363mm (14.29") precipitation respectively. In stark contrast, the month of February shows a minimal rainfall of only 32mm (1.26"), highlighting the sharp variability. Similarly, the daylight hours mildly fluctuate from 11.2 hours in December to an annual high of 13.1 hours in June. Interestingly, despite varying daylight durations, the sunshine hours remain stable at an average of 7 hours throughout the year.

UV Index, indicating the strength of sunburn-producing ultraviolet (UV) radiation, presents high values for each month, reaching a peak of 12 between March and September. The higher the UV Index, the stronger the sun’s rays, and the greater the chance of skin damage. Therefore, protective measures against the intense tropical sun seem particularly important in Hoi An, Vietnam.

Translating the numbers into travel advice, the ideal time for a visit to this tropical destination would occur within the months of February to April. These months see a decrease in rainfall from 92mm (3.62") in January to 30mm (1.18") in March, providing relatively dry conditions ideal for outdoor activities. Along with lower rainfall, the temperature remains in a comfortable range between 20°C (68°F) to 28°C (82.4°F). Moreover, abundant sunshine hours amounting to 7 hours per day, coupled with longer daylight duration from 11.6 hours to 12.1 hours, offer plenty of opportunities to soak in the scenic beauty.

Conversely, the months from September to November might pose a challenge to travelers due to heavy rainfall. With precipitation levels soaring to a high 526mm (20.71") in October, outdoor activities could be hampered significantly. Despite the high temperatures ranging from 24°C (75.2°F) to 33°C (91.4°F), the humidity associated with the rainfall could make the weather uncomfortable. Additionally, despite similar sunshine hours as the rest of the year, the increased cloud cover due to persistent rains might obscure direct sunlight.

Spring in Hoi An ushers in mild climatic conditions. Spanning from February to April, the temperatures gently climb from a low of 20°C (68°F) up to a high of 30°C (86°F). The rainfall during this period gradually decreases from 32mm (1.26") to 30mm (1.18"). Similar to the rest of the year, the sunshine hours remain at a constant average of 7 hours per day. However, the daylight hours increase progressively from 11.6 hours in February to reach 12.5 hours in April.

Experiencing the heat of the tropics, summer in Hoi An (May to August) is marked by high temperatures that vary from 23°C (73.4°F) to 33°C (91.4°F). Along with the rising heat, this period encounters a sudden surge in rainfall, starting from 56mm (2.2") in May and peaking at 104mm (4.09") by August. The daylight hours remain relatively stable, fluctuating between 12.9 hours and 12.6 hours, while the sunshine hours see a minor dip to 5 hours in June and August.

Autumn in Hoi An, extending from September to November, poses a sharp contrast to the preceding months. This period witnesses the highest rainfall of the year, culminating at a hefty 526mm (20.71") in October. Conversely, temperatures begin a slow descent from a high of 31°C (87.8°F) to 27°C (80.6°F) by November. Despite the heavy rainfall, the sunshine hours see a small increase to 6 hours per day.

The winter months in Hoi An (December to January) experience a significant decrease in rainfall, dropping to 206mm (8.11") and 92mm (3.62") successively. Seedling the slightest chill in the tropical atmosphere, the temperatures oscillate between 20°C (68°F) and 26°C (78.8°F). The shorter daylight hours, decreasing from 11.4 hours to 11.2 hours, are mitigated by the constant 7 hours of sunshine. This could prove an ideal time for those seeking a warm winter getaway.

As Hoi An welcomes the new year, the city experiences comparatively cooler weather conditions, making January one of the ideal months to visit. With lower rainfall than the previous month, reaching only 92mm (3.62") over an average of five days, the reduced precipitation allows for an increase in outdoor activities. Weather in January »

Transitioning into February, Hoi An starts to bid farewell to the cooler temperatures experienced during the start of the year. With a drop in rainfall to only 32mm (1.26") this month, outdoor enthusiasts will find this month ideal for exploring the vibrant city. Weather in February »

March signals the commencement of spring in Hoi An and with it comes a mild rise in temperature compared to the previous month. The rain intensity stays relatively low, with only a slight increase to 30mm (1.18"). Longer daylight hours become noticeable in this month, renewing hobbies such as early morning walks and sunset viewings. Weather in March »

April's weather continues the warming trend initiated in March, however, the rainfall slightly increases to 34mm (1.34"), allowing for an extended period of pleasant weather. The river-based city comes alive during this time as longer daylight and milder temperatures provide idyllic conditions for river exploration and local farming activities. Weather in April »

May marks the start of the summer season in Hoi An. With temperatures reaching their peak at 32°C (89.6°F), the city embraces the hotter days. The rainfall also starts to show a significant rise to 56mm (2.2"), indicating the beginning of the rainy season. Weather in May »

As June arrives in Hoi An, it brings with it a surge in rainfall with 99mm (3.9") spread over 20 days. Despite the rise in precipitation, the temperatures remain steady, signalling the arrival of the city's monsoon. This month's weather creates an atmospheric experience for visitors, combining the heat of summer with the refreshing quality of rain. Weather in June »

July is characterized by heavy rainfall in Hoi An, marked by 90mm (3.54") of precipitation over a span of 19 days. The high temperatures are consistent with those of the previous month. The weather conditions of this month deliver a rich cultural taste of Vietnam to visitors; the monsoon season is traditionally associated with rice cultivation in the region. Weather in July »

August in Hoi An experiences a further upswing in rainfall. With rainfall reaching an average of 104mm (4.09"), it is significantly higher than any previous month. Despite this, the temperature remains uniformly high, and there is a slight decrease in daylight hours. Weather in August »

September brings the highest rainfall of the year to Hoi An, with a significant increase to 297mm (11.69"). Despite the heavy rain, the city maintains a warm climate throughout the month. The increase in rainfall marks the peak of the monsoon season and offers a unique perspective regarding Vietnamese cuisine as the region enjoys a bounty of fresh produce and abundant seafood. Weather in September »

October experiences a further increase in rainfall with a substantial 526mm (20.71") marking the monsoon's peak. The weather, despite being rainy, is accompanied by warm temperatures which remain consistent. The combination of heavy rains and warm weather creates an atmosphere for growth and rejuvenation, enhancing the natural beauty of Hoi An. Weather in October »

In November, Hoi An sees a reduction of rain to 363mm (14.29"), marking the end phase of the monsoon season. This month's characteristic is a steady decrease in rainfall and remains considerably warm. The reduction in rainfall offers more opportunity for exploration and brings relief to those who desire to witness Hoi An in its lively cultural ambiance. Weather in November »

December sees a significant drop in rainfall to 206mm (8.11"), signaling the end of the monsoon season. Despite the change in weather, temperatures remain fairly warm for the first part of winter. Longer daylight hours offer an opportunity to indulge in outdoor activities. Weather in December »