Hanoi Weather in May
Vietnam · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
May in Hanoi sees average temperatures ranging from a low of 24.8°C (76.6°F) to a high of 31.9°C (89.4°F), with a mean of 27.9°C (82.2°F). Compared to the annual average of 24.3°C (75.7°F), this month is 3.6°C warmer than the yearly norm. Precipitation averages 206.2mm, making it approximately 25.0mm wetter than the monthly average of 181.0mm. The city receives an average of 8.3 hours of sunshine per day during May, with relative humidity averaging 81.0%. Wind speeds reach an average maximum of 16.7 km/h. For travelers, this month offers a temperature experience in Hanoi, with wetter-than-average conditions compared to the rest of the year.
Hanoi taught me that 'winter' in Southeast Asia is relative — but still real. I arrived in January in a t-shirt and shivered through 14°C with 85% humidity. That damp cold cuts through layers in a way the thermometer doesn't capture. Pack a fleece and light jacket November-February. The nightmare window is June-August: 33°C, 80% humidity, and downpours that flood the Old Quarter streets. May and October are the smart traveler's picks: 27°C, lower humidity, manageable rain. Always carry a compact umbrella year-round — Hanoi averages 1600mm and the rain comes fast.
May vs Adjacent Months
| Metric | April | May | June |
|---|---|---|---|
| Mean Temp | 24.7°C (76.5°F) | 27.9°C (82.2°F) | 29.8°C (85.6°F) |
| Rainfall | 89.1mm | 206.2mm | 273.6mm |
| Sunshine | 5.8 hrs | 8.3 hrs | 8.8 hrs |
| Humidity | 82.0% | 81.0% | 79.0% |
| Wind | 16.9 km/h | 16.7 km/h | 15.2 km/h |
| Rainy Days | 20.0 | 21.2 | 21.8 |
Seasonal Context
May falls in Spring in the Northern Hemisphere. Spring is a transitional season with temperatures rising from winter lows. For travelers visiting Hanoi in May, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Hanoi in May?
The average temperature in Hanoi during May ranges from 24.8°C (76.6°F) to 31.9°C (89.4°F), with a mean of 27.9°C (82.2°F).
How much does it rain in Hanoi in May?
Hanoi receives an average of 206.2mm of precipitation in May, spread across approximately 21.2 rainy days.
What should I pack for Hanoi in May?
Based on May weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 206.2mm of precipitation.
Is May a good time to visit Hanoi?
May is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Hanoi
Cities with Similar May Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 21.03°, 105.85°. Timezone: Asia/Ho_Chi_Minh. Last updated: 2026-07-30.