Climate Overview
The climate in Thanh Hóa is hot. The average annual temperature is 25°C and approximately 1602mm of precipitation falls per year. September is the wettest month, receiving around 319mm of rainfall. Thanh Hóa is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: June, July, May. The coldest months are January, December, February, when temperatures can drop to 16°C.
Temperature
Thanh Hóa sees moderate temperature variation throughout the year, ranging from 16°C to 35°C. June is the hottest month, with daytime highs reaching 35°C and an average of 31°C. January is the coolest month, with minimum temperatures around 16°C and an average of 18°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between November and December, with a 4°C shift in average temperatures.
Precipitation
Thanh Hóa is a fairly wet location, receiving approximately 1602mm of precipitation annually, which averages out to around 133mm per month. The wettest month is September, averaging 319mm of rainfall. August and July also tend to see above-average precipitation. The driest month is February, with just 18mm. That's 301mm less than September, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Thanh Hóa is mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.
Seasons
89 days until Summer
It is currently spring in Thanh Hóa, which began on March 20, 2026. Thanh Hóa is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in June at around 35°C, while the coldest stretch bottoms out in January near 16°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 20 to 33°C. Precipitation is moderate at around 273mm for the season, averaging 91mm per month. Winds are moderate at around 15km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 27 to 35°C. Rainfall is heavy, totalling around 670mm across the season with a monthly average of 223mm. Winds are generally light, averaging 14km/h. Stay hydrated, wear sun protection, and seek shade during the hottest hours of the day.
Autumn
Temperatures range from 21 to 32°C. Rainfall is heavy, totalling around 573mm across the season with a monthly average of 191mm. Winds are generally light, averaging 15km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 16 to 22°C. Rainfall is relatively light, with around 87mm over the season and a monthly average of 29mm. Winds are generally light, averaging 15km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Thanh Hóa is during January, February, March, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 38mm per month. By contrast, June can be uncomfortably hot with temperatures reaching 35°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Thanh Hóa based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
