Ulan Bator Weather in May
Average highs run from 11°C on May 1 to 18°C on May 31, and lows from -3°C to 3°C. Normal precipitation for the month is 25 mm over about 6 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
- 15°C
- Average low
- 0°C
- Precipitation
- 25 mm
- Reanalysis high
- 30°CMay 31, 2018
- Reanalysis low
- -13°CMay 1, 1995
- Daylight
- 14 h 30 min to 15 h 43 min
- Cloud cover
- 65%
- Humidity
- 50%
- Dew point
- -4°C
- Wind
- 18.0 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 | 11°C | -3°C | 24°C 2020 | -13°C 1995 | 14% |
| May 2 | 11°C | -3°C | 21°C 2013 | -12°C 1995 | 15% |
| May 3 | 12°C | -3°C | 22°C 2018 | -12°C 1995 | 16% |
| May 4 | 12°C | -3°C | 24°C 2009 | -8°C 2001 | 18% |
| May 5 | 12°C | -2°C | 27°C 2012 | -9°C 2017 | 19% |
| May 6 | 12°C | -2°C | 25°C 2000 | -9°C 1993 | 19% |
| May 7 | 12°C | -2°C | 25°C 2018 | -6°C 1992 | 18% |
| May 8 | 13°C | -2°C | 23°C 2017 | -7°C 2014 | 18% |
| May 9 | 13°C | -2°C | 25°C 1997 | -7°C 2006 | 18% |
| May 10 | 13°C | -2°C | 21°C 2018 | -7°C 2011 | 18% |
| May 11 | 13°C | -1°C | 25°C 2001 | -7°C 2016 | 18% |
| May 12 | 14°C | -1°C | 26°C 2001 | -8°C 2016 | 19% |
| May 13 | 14°C | -1°C | 24°C 1998 | -7°C 2014 | 19% |
| May 14 | 14°C | -1°C | 25°C 1998 | -6°C 2014 | 19% |
| May 15 | 15°C | -1°C | 26°C 2017 | -6°C 2004 | 18% |
| May 16 | 15°C | 0°C | 29°C 2017 | -6°C 2006 | 18% |
| May 17 | 15°C | 0°C | 29°C 2017 | -7°C 2006 | 18% |
| May 18 | 15°C | 0°C | 30°C 1991 | -6°C 2006 | 17% |
| May 19 | 16°C | 0°C | 25°C 2001 | -6°C 2011 | 16% |
| May 20 | 16°C | 1°C | 27°C 2012 | -6°C 1993 | 16% |
| May 21 | 16°C | 1°C | 25°C 1996 | -6°C 1993 | 17% |
| May 22 | 16°C | 1°C | 28°C 1996 | -7°C 2018 | 16% |
| May 23 | 17°C | 1°C | 28°C 2019 | -6°C 2006 | 17% |
| May 24 | 17°C | 1°C | 25°C 2008 | -7°C 2006 | 17% |
| May 25 | 17°C | 2°C | 29°C 2017 | -5°C 1995 | 18% |
| May 26 | 17°C | 2°C | 28°C 2017 | -5°C 1998 | 18% |
| May 27 | 18°C | 2°C | 30°C 1996 | -5°C 2008 | 18% |
| May 28 | 18°C | 2°C | 28°C 1992 | -7°C 2009 | 18% |
| May 29 | 18°C | 3°C | 28°C 2007 | -5°C 2008 | 18% |
| May 30 | 18°C | 3°C | 30°C 2002 | -3°C 2004 | 19% |
| May 31 | 18°C | 3°C | 30°C 2018 | -4°C 1993 | 20% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+8).
- May 1
- sunrise 5:35 AM, sunset 8:05 PM
- May 31
- sunrise 4:59 AM, sunset 8:42 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.