January 20° · ☂ 8 ★ February22° · ☂ 8 ★ March24° · ☂ 10 April 28° · ☂ 10 May 32° · ☂ 17 June 35° · ☂ 18 July 34° · ☂ 21 August 33° · ☂ 23 September 32° · ☂ 19 October 30° · ☂ 12 November 27° · ☂ 7 ★ December22° · ☂ 7 Hanoi in May:seriously hot Hanoi, Vietnam · Records from 2006 to 2025. Not a forecast. Rain not yet station-calibrated Temperature partly station-corrected
Mean high 32° Hottest day 40.1° (2023)
Mean low 25° Coldest night 18.2° (2007)
Rain days 17 days 11-24 by year
Rainfall 229mm Daylight 12.9 → 13.3 h
Hanoi's 12 months i Best: February, March and December (rain uncalibrated)
1 2 3 4 5 6 7 8 9 10 11 12
Trip types Sightseeing on foot Poorhot, frequent rain and muggy
Humidity 80% 29 muggy days
Clear days 3 days 17 overcast days
Mean wind 8 km/h Rarely windy
Sunrise / sunset (15th) 05:19 / 18:27 Daylight 12.9 → 13.3 h
Hanoi in May The rainy season begins and real heat arrives. Some places close for Labour Day on May 1. The unshaded path around Hoan Kiem Lake is better walked in the early morning or evening.
Highs averaged 32°C and lows stayed at 25°C, so the heat hung on long after sunset. Rain came so often (17 days on average) that dry stretches were short and worth using. It varied a lot from year to year. May 2021 had 11 rain days; 2024 had 24.
With 24 days above 30°C on average, most of the month felt like high summer. The warmest year was 2015, with highs averaging 35.3°C, 2.9°C above normal.
Typhoons i Typhoons: June to November
Date by date i Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
May 1 Saturday 1 rain in 10 of 20 yrs 10/20 30° 23° May 1 rain on 50% of days 30° 23°
May 2 Sunday 2 rain in 5 of 20 yrs 5/20 32° 23° May 3 Monday 3 rain in 8 of 20 yrs 8/20 32° 24° May 4 Tuesday 4 rain in 10 of 20 yrs 10/20 32° 24° May 5 Wednesday 5 rain in 11 of 20 yrs 11/20 31° 24° May 6 Thursday 6 rain in 8 of 20 yrs 8/20 32° 24° May 7 Friday 7 rain in 9 of 20 yrs 9/20 33° 25° May 8 Saturday 8 rain in 10 of 20 yrs 10/20 33° 25° 2-8 rain on 44% of days 32° 24°
May 9 Sunday 9 rain in 13 of 20 yrs 13/20 32° 24° May 10 Monday 10 rain in 14 of 20 yrs 14/20 32° 25° May 11 Tuesday 11 rain in 14 of 20 yrs 14/20 32° 25° May 12 Wednesday 12 rain in 14 of 20 yrs 14/20 31° 24° May 13 Thursday 13 rain in 9 of 20 yrs 9/20 31° 24° May 14 Friday 14 rain in 7 of 20 yrs 7/20 32° 25° May 15 Saturday 15 rain in 13 of 20 yrs 13/20 32° 25° 9-15 rain on 60% of days 32° 25°
May 16 Sunday 16 rain in 10 of 20 yrs 10/20 33° 25° May 17 Monday 17 rain in 8 of 20 yrs 8/20 33° 25° May 18 Tuesday 18 rain in 7 of 20 yrs 7/20 34° 25° May 19 Wednesday 19 rain in 9 of 20 yrs 9/20 33° 25° May 20 Thursday 20 rain in 12 of 20 yrs 12/20 33° 26° May 21 Friday 21 rain in 11 of 20 yrs 11/20 33° 26° May 22 Saturday 22 rain in 14 of 20 yrs 14/20 33° 26° 16-22 rain on 51% of days 33° 25°
May 23 Sunday 23 rain in 17 of 20 yrs 17/20 32° 26° May 24 Monday 24 rain in 16 of 20 yrs 16/20 32° 25° May 25 Tuesday 25 rain in 10 of 20 yrs 10/20 32° 25° May 26 Wednesday 26 rain in 12 of 20 yrs 12/20 33° 26° May 27 Thursday 27 rain in 12 of 20 yrs 12/20 33° 26° May 28 Friday 28 rain in 11 of 20 yrs 11/20 33° 26° May 29 Saturday 29 rain in 13 of 20 yrs 13/20 33° 26° 23-29 rain on 65% of days 33° 26°
May 30 Sunday 30 rain in 12 of 20 yrs 12/20 33° 26° May 31 Monday 31 rain in 10 of 20 yrs 10/20 34° 26°
30-31 rain on 55% of days 33° 26°
May 1 rain on 50% of days 30° 23° 2-8 rain on 44% of days 32° 24° 9-15 rain on 60% of days 32° 25° 16-22 rain on 51% of days 33° 25° 23-29 rain on 65% of days 33° 26° 30-31 rain on 55% of days 33° 26°
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
May 1 Monday 1 rain in 10 of 20 yrs 10/20 30° 23° May 2 Tuesday 2 rain in 5 of 20 yrs 5/20 32° 23° May 3 Wednesday 3 rain in 8 of 20 yrs 8/20 32° 24° May 4 Thursday 4 rain in 10 of 20 yrs 10/20 32° 24° May 5 Friday 5 rain in 11 of 20 yrs 11/20 31° 24° May 6 Saturday 6 rain in 8 of 20 yrs 8/20 32° 24° 1-6 rain on 43% of days 32° 24°
May 7 Sunday 7 rain in 9 of 20 yrs 9/20 33° 25° May 8 Monday 8 rain in 10 of 20 yrs 10/20 33° 25° May 9 Tuesday 9 rain in 13 of 20 yrs 13/20 32° 24° May 10 Wednesday 10 rain in 14 of 20 yrs 14/20 32° 25° May 11 Thursday 11 rain in 14 of 20 yrs 14/20 32° 25° May 12 Friday 12 rain in 14 of 20 yrs 14/20 31° 24° May 13 Saturday 13 rain in 9 of 20 yrs 9/20 31° 24° 7-13 rain on 59% of days 32° 25°
May 14 Sunday 14 rain in 7 of 20 yrs 7/20 32° 25° May 15 Monday 15 rain in 13 of 20 yrs 13/20 32° 25° May 16 Tuesday 16 rain in 10 of 20 yrs 10/20 33° 25° May 17 Wednesday 17 rain in 8 of 20 yrs 8/20 33° 25° May 18 Thursday 18 rain in 7 of 20 yrs 7/20 34° 25° May 19 Friday 19 rain in 9 of 20 yrs 9/20 33° 25° May 20 Saturday 20 rain in 12 of 20 yrs 12/20 33° 26° 14-20 rain on 47% of days 33° 25°
May 21 Sunday 21 rain in 11 of 20 yrs 11/20 33° 26° May 22 Monday 22 rain in 14 of 20 yrs 14/20 33° 26° May 23 Tuesday 23 rain in 17 of 20 yrs 17/20 32° 26° May 24 Wednesday 24 rain in 16 of 20 yrs 16/20 32° 25° May 25 Thursday 25 rain in 10 of 20 yrs 10/20 32° 25° May 26 Friday 26 rain in 12 of 20 yrs 12/20 33° 26° May 27 Saturday 27 rain in 12 of 20 yrs 12/20 33° 26° 21-27 rain on 66% of days 33° 26°
May 28 Sunday 28 rain in 11 of 20 yrs 11/20 33° 26° May 29 Monday 29 rain in 13 of 20 yrs 13/20 33° 26° May 30 Tuesday 30 rain in 12 of 20 yrs 12/20 33° 26° May 31 Wednesday 31 rain in 10 of 20 yrs 10/20 34° 26°
28-31 rain on 58% of days 33° 26°
1-6 rain on 43% of days 32° 24° 7-13 rain on 59% of days 32° 25° 14-20 rain on 47% of days 33° 25° 21-27 rain on 66% of days 33° 26° 28-31 rain on 58% of days 33° 26°
Tap another date to change
2006 18mm
2007 none
2008 4mm
2009 2mm
2010 46mm
2011 33mm
2012 35mm
2013 13mm
2014 none
2015 43mm
2016 4mm
2017 21mm
2018 none
2019 1mm
2020 16mm
2021 9mm
2022 42mm
2023 16mm
2024 9mm
2025 41mm
Holidays in May (2027) April 30 to May 3 Reunification Day and Labour Day break *May 1 International Labour DayMay 3 Labour Day substitute holiday (1 May is a Saturday) *May 31 Memorial Day * Provisional: not yet officially announced.
1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)
Day by day temperature i 21° 28° 35° 42° 1 8 15 22 29 31
Your trip dates, the past 20 years Trip dates May 1 (Sat) 2 (Sun) 3 (Mon) 4 (Tue) 5 (Wed) 6 (Thu) 7 (Fri) 8 (Sat) 9 (Sun) 10 (Mon) 11 (Tue) 12 (Wed) 13 (Thu) 14 (Fri) 15 (Sat) 16 (Sun) 17 (Mon) 18 (Tue) 19 (Wed) 20 (Thu) 21 (Fri) 22 (Sat) 23 (Sun) 24 (Mon) 25 (Tue) 26 (Wed) 27 (Thu) 28 (Fri) 29 (Sat) 30 (Sun) 31 (Mon) ~ May 1 (Sat) 2 (Sun) 3 (Mon) 4 (Tue) 5 (Wed) 6 (Thu) 7 (Fri) 8 (Sat) 9 (Sun) 10 (Mon) 11 (Tue) 12 (Wed) 13 (Thu) 14 (Fri) 15 (Sat) 16 (Sun) 17 (Mon) 18 (Tue) 19 (Wed) 20 (Thu) 21 (Fri) 22 (Sat) 23 (Sun) 24 (Mon) 25 (Tue) 26 (Wed) 27 (Thu) 28 (Fri) 29 (Sat) 30 (Sun) 31 (Mon) 1-7 8-14 15-21 22-end Whole month
You can also click two dates on the axis. Hover a cell to see that day's rain. By year Driest trips first
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Trip rain days Month rain days Tap a date to start, tap another to end. Each cell is that date in one year. '06 '07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17 '18 '19 '20 '21 '22 '23 '24 '25
of 20 Dates outside your trip are dimmed.
One row per year, one cell per day. 2021 had 11 rain days, 2024 had 24.
Common questions Does it rain a lot in Hanoi in May? Over the past 20 years May averaged 17 rain days (1 mm or more) out of 31. Individual years ran from 11 in the driest to 24 in the wettest. Rain for this month is not yet station-calibrated and may be overcounted.
What should I wear in Hanoi in May? Days averaged 32°C and nights 25°C. Pack an umbrella, sandals that can get wet, T-shirts, sunscreen plus a hat, and insect repellent.
Is May a good time to visit Hanoi? On warmth and rain days alone, Hanoi's easiest months were February, March and December. May ranked 9 of 12.
Is Hanoi humid in May? Mean relative humidity was 80%, with about 29 muggy days (dew point of 20°C or more) in the month.
Previous month Hanoi in April Next month Hanoi in June Whole year Hanoi weather by month Where to go May By country Vietnam: all cities this month Compare Compare with Da Nang