Lao Cai

Stay up to date with the latest weather conditions in Lao Cai. Below you will find real-time data, forecasts, and helpful weather charts for your convenience.

The climate in Lao Cai, located in northern Vietnam, is classified as humid subtropical. The city experiences distinct seasonal changes in temperature and humidity, setting it apart from the constant tropical heat typical of the country's southern regions. There are noticeable temperature variations between the warm and cool seasons.

Lao Cai has two clearly defined main seasons. Summer, lasting roughly from May to September, is quite warm, with average temperatures ranging between 24-25.5°C. This period is also characterized by high humidity and the highest number of rainy days — from May to August, there can be between 24 and 29 such days per month, indicating frequent, though not always heavy, rain or drizzle. Winter, from November to February, brings cooler and noticeably drier weather. Average temperatures during this time drop to 13-18°C, rainfall is minimal (especially in November and December), and the number of rainy days decreases to 14-19 per month.

One of the striking features of the weather in Lao Cai is the high frequency of rainy days, especially in the summer months, even if the total amount of precipitation is relatively low. This means the sky is often overcast, and drizzle is common. In contrast, the winter months offer drier, cooler weather with fewer cloudy days, which can be more comfortable for active tourism. Therefore, when planning your trip, consider these seasonal fluctuations: summer will be warm with a high probability of frequent but not necessarily heavy rain, while winter will be cool and sunnier.

The climate in Lao Cai is characterized by significant seasonal temperature fluctuations. Throughout the year, the average monthly temperature varies from a cool 13.7°C in January to a warm 25.5°C in June and July. The coldest months are traditionally December and January, when average minimum temperatures drop to 10°C, and maximums rarely exceed 17-18°C. In contrast, the peak heat occurs in June and July, with average maximum temperatures around 28.6-28.7°C and minimums staying above 22°C.

The summer period, spanning from May to September, is quite hot and humid in Lao Cai. Average daytime temperatures during this time remain steadily above 27°C, peaking at nearly 29°C in June and July. Nights also stay very warm, with temperatures rarely falling below 20-22°C. High rainfall and a large number of rainy days during the summer months contribute to a feeling of increased humidity.

Winter, from December to February, brings a noticeable chill to Lao Cai. Average temperatures during these months range between 13-15°C. During the day, the thermometer may rise to 17-19°C, but nights can be quite cold, with temperatures around 10-11°C. Throughout the year, there is a moderate difference between day and night temperatures, averaging 6-9°C, providing some relief after hot summer days and a refreshing coolness on winter nights.

The city of Lao Cai experiences pronounced seasonality in its rainfall distribution throughout the year. While rainy days occur fairly often all year round, the amount of precipitation varies significantly, creating a wetter summer period and a drier winter. Snow is not characteristic of Lao Cai; precipitation falls primarily as rain.

The highest amount of rainfall occurs between May and September. August is the wettest month, with an average of about 12 mm of precipitation, followed by June with 10 mm. During these summer months, especially in July and August, rain falls very frequently — up to 29 days per month. Given the total amount of precipitation, these are likely frequent but light rains or drizzles typical for this region.

The dry season in Lao Cai usually lasts from November to February. The driest months are November and December, when the average precipitation is only about 2 mm. The number of rainy days during this period also decreases, reaching a minimum in December (around 14 days) and November (around 15 days). This indicates that precipitation becomes rarer and even more sparse than in other seasons, often appearing as a light mist.

When planning a trip to Lao Cai, it is important to choose your wardrobe carefully, keeping the distinct seasonality in mind. The cool season lasts from November to February. From December to February, average temperatures hover around 13.7-15.5°C, while November is significantly warmer, with an average temperature of about 18.5°C. Nights during this period can be quite chilly, with temperatures dropping to 10-11°C. You will need warm clothes at this time: sweaters, fleeces, a light jacket or windbreaker, and closed-toe shoes. Although there is little rainfall during these months, a light waterproof jacket or umbrella may still come in handy, as rainy days do occur.

From May to September, Lao Cai enters its hot and humid season. Average temperatures rise to 24-25.5°C, and the number of rainy days increases significantly, especially from June to August. During this time, lightweight, breathable clothing made of natural fabrics, sandals, or other open footwear are preferred. Be sure to bring a reliable umbrella or raincoat, as showers can be frequent. Sunscreen and a hat are also essential for sun protection. In transition months like March, April, and October, the weather can be unpredictable, so layering is the best approach — a light jacket, a T-shirt, and the option to add warmth will be useful.

Regardless of the season, comfortable walking shoes are your best companion in Lao Cai, as you will likely want to explore the surrounding areas. It is also recommended to carry insect repellent, especially during the warm and humid season. An electronics adapter and a portable charger can also be very helpful. Keep in mind that even in the warmer months, evenings can be cooler, especially in mountainous areas, so a light sweater or shawl is a good idea.