Verdict: Fair month
Hanoi Weather in May
May runs warm in Hanoi, with daily highs around 32°C (90°F) and nights near 25°C (77°F). It's also the wet side of the calendar: rain falls on about 17 days, so build flexibility into plans. May is workable in Hanoi if your dates are fixed — just plan around the conditions.
Average high
32°C / 90°F
Average low
25°C / 77°F
Rain days
~17
Precipitation
206 mm
What to pack for Hanoi in May
- Light, breathable clothing — linen and technical fabrics earn their keep
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Rain gear is non-negotiable — expect rain on roughly 17 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
May against the rest of the year
Warmest in Hanoi: Jun (33°C / 91°F) · Coolest: Jan (21°C / 70°F) · Wettest: Aug (~25 rain days)
21°
14°
Jan
23°
16°
Feb
26°
19°
Mar
29°
21°
Apr
32°
25°
May
33°
27°
Jun
33°
27°
Jul
32°
26°
Aug
31°
25°
Sep
28°
22°
Oct
27°
19°
Nov
22°
14°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)