Hanoi Weather in May
During May, Hanoi experiences very high daytime temperatures of 33°C (91°F) and cooler nights around 25°C (77°F). May sits within the rainy season, so expect regular and often heavy rainfall.
Rainfall in Hanoi in May
Hanoi is in the rainy season in May, with rain on around 15 days and an average of 236 mm (9.3 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Hanoi in May
Temperatures in Hanoi in May top out at 33°C (91°F) and drop to 25°C (77°F) overnight. Mornings and evenings are often more comfortable than the peak afternoon hours. With overnight lows of 25°C (77°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.
Sunshine in Hanoi in May
The city usually sees around 181 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).May in Hanoi has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Hanoi's climate page.
Hanoi Temperature in May
Min Temperature
25°C (77°F)
Max Temperature
33°C (91°F)
Chance of Rain
48%
Precipitation
236 mm (9.3 in)
Rainy days
15 days
Humidity
86%
Sunshine
181 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Hanoi typically stay consistent throughout May, with daily highs averaging around 33°C (91°F). Nights are warm, with lows typically ranging from 23°C (73°F) to 26°C (79°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Hanoi in May
Browse day-by-day weather records for Hanoi spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Hanoi historical weather extremes in May
Based on 50 years of weather observations in Hanoi between 1976 and 2026, these are the recorded extremes.
- Hanoi recorded its highest May temperature of 40°C (104°F) on May 25, 1987.
- Hanoi experienced its chilliest May day on May 6, 1994, reaching only 21°C (70°F).
- The coldest night in May in Hanoi was on May 5, 1994, with a minimum of 18°C (64°F).
Best Places in Vietnam in May
Find out more about the weather in Vietnam and which places have the best travel conditions in this month. See all of Vietnam in May →
perfect weather
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What to Wear in Hanoi in May
Get ready for hot weather in May! Lightweight, breathable fabrics are your best friend during this month. Cotton and linen shirts, shorts, sundresses, and sandals will keep you comfortable. Light colors help reflect the heat, avoid wearing black. Also bring a poncho, it will rain a lot! Waterproof everything you can. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Hanoi in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Hanoi's climate page.
Temperature Rainfall Sunshine Humidity
See the full Hanoi climate overview or explore weather in Vietnam.
