Hạ Long Weather in May
Average highs run from 30°C on May 1 to 30°C on May 31, and lows from 23°C to 25°C. Normal precipitation for the month is 171 mm over about 19 wet days.
May day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
May at a glance
- Average high
- 30°C
- Average low
- 24°C
- Precipitation
- 171 mm
- Reanalysis high
- 40°CMay 3, 1994
- Reanalysis low
- 17°CMay 2, 1991
- Daylight
- 12 h 54 min to 13 h 19 min
- Cloud cover
- 77%
- Humidity
- 83%
- Dew point
- 24°C
- Wind
- 11.9 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 30°C | 23°C | 37°C 2005 | 19°C 2007 | 44% |
| May 2 | 30°C | 23°C | 39°C 1994 | 17°C 1991 | 47% |
| May 3 | 30°C | 23°C | 40°C 1994 | 20°C 2009 | 48% |
| May 4 | 30°C | 23°C | 36°C 2012 | 19°C 2011 | 48% |
| May 5 | 30°C | 23°C | 36°C 2005 | 19°C 2007 | 49% |
| May 6 | 30°C | 23°C | 37°C 2003 | 19°C 2014 | 50% |
| May 7 | 30°C | 24°C | 39°C 2003 | 19°C 2007 | 50% |
| May 8 | 30°C | 24°C | 37°C 1992 | 18°C 1991 | 51% |
| May 9 | 30°C | 24°C | 34°C 2010 | 19°C 1991 | 52% |
| May 10 | 30°C | 24°C | 35°C 2005 | 19°C 2001 | 54% |
| May 11 | 30°C | 24°C | 35°C 2005 | 20°C 2001 | 54% |
| May 12 | 30°C | 24°C | 36°C 2005 | 21°C 1999 | 54% |
| May 13 | 30°C | 24°C | 34°C 2005 | 20°C 2006 | 56% |
| May 14 | 30°C | 24°C | 33°C 2013 | 19°C 2006 | 59% |
| May 15 | 30°C | 24°C | 35°C 2013 | 19°C 2006 | 60% |
| May 16 | 30°C | 24°C | 34°C 2005 | 19°C 1995 | 61% |
| May 17 | 30°C | 24°C | 36°C 2005 | 19°C 2011 | 60% |
| May 18 | 30°C | 24°C | 35°C 2006 | 21°C 2011 | 60% |
| May 19 | 30°C | 25°C | 34°C 2010 | 20°C 2000 | 61% |
| May 20 | 30°C | 25°C | 34°C 2010 | 20°C 2000 | 62% |
| May 21 | 30°C | 25°C | 34°C 1996 | 22°C 2000 | 64% |
| May 22 | 30°C | 25°C | 36°C 2010 | 21°C 1995 | 66% |
| May 23 | 30°C | 25°C | 35°C 2007 | 19°C 2011 | 67% |
| May 24 | 30°C | 25°C | 36°C 2007 | 20°C 2011 | 68% |
| May 25 | 30°C | 25°C | 33°C 1991 | 20°C 1998 | 68% |
| May 26 | 30°C | 25°C | 35°C 2000 | 21°C 2017 | 69% |
| May 27 | 30°C | 25°C | 33°C 2000 | 20°C 1999 | 69% |
| May 28 | 30°C | 25°C | 33°C 2015 | 21°C 2011 | 70% |
| May 29 | 30°C | 25°C | 33°C 1994 | 22°C 1997 | 69% |
| May 30 | 30°C | 25°C | 36°C 1992 | 21°C 2009 | 70% |
| May 31 | 30°C | 25°C | 33°C 1993 | 21°C 2008 | 71% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+7).
- May 1
- sunrise 5:22 AM, sunset 6:16 PM
- May 31
- sunrise 5:10 AM, sunset 6:29 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.