Ko Samui Weather in July
Average highs run from 29°C on July 1 to 29°C on July 31, and lows from 28°C to 27°C. Normal precipitation for the month is 167 mm over about 28 wet days.
July day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
July at a glance
- Average high
- 29°C
- Average low
- 27°C
- Precipitation
- 167 mm
- Reanalysis high
- 31°CJul 1, 2002
- Reanalysis low
- 26°CJul 28, 2008
- Daylight
- 12 h 40 min to 12 h 33 min
- Cloud cover
- 86%
- Humidity
- 80%
- Dew point
- 25°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 |
|---|---|---|---|---|---|
| Jul 1 | 29°C | 28°C | 31°C 2002 | 26°C 1999 | 85% |
| Jul 2 | 29°C | 28°C | 31°C 2002 | 26°C 2000 | 85% |
| Jul 3 | 29°C | 28°C | 30°C 2019 | 26°C 2008 | 86% |
| Jul 4 | 29°C | 28°C | 30°C 2019 | 27°C 1999 | 87% |
| Jul 5 | 29°C | 28°C | 30°C 2014 | 27°C 2001 | 88% |
| Jul 6 | 29°C | 28°C | 30°C 2020 | 27°C 2012 | 88% |
| Jul 7 | 29°C | 28°C | 30°C 2002 | 27°C 2012 | 89% |
| Jul 8 | 29°C | 28°C | 31°C 2002 | 27°C 2012 | 90% |
| Jul 9 | 29°C | 28°C | 31°C 2002 | 27°C 2012 | 91% |
| Jul 10 | 29°C | 28°C | 31°C 2002 | 27°C 2001 | 91% |
| Jul 11 | 29°C | 28°C | 31°C 2002 | 27°C 2000 | 90% |
| Jul 12 | 29°C | 28°C | 31°C 2002 | 27°C 2004 | 90% |
| Jul 13 | 29°C | 28°C | 31°C 2002 | 26°C 2003 | 89% |
| Jul 14 | 29°C | 28°C | 31°C 2002 | 26°C 2003 | 88% |
| Jul 15 | 29°C | 28°C | 30°C 2019 | 27°C 2001 | 88% |
| Jul 16 | 29°C | 27°C | 30°C 1999 | 27°C 2001 | 88% |
| Jul 17 | 29°C | 27°C | 30°C 2015 | 27°C 2011 | 87% |
| Jul 18 | 29°C | 27°C | 30°C 2017 | 27°C 2004 | 87% |
| Jul 19 | 29°C | 27°C | 30°C 1991 | 27°C 2013 | 85% |
| Jul 20 | 29°C | 27°C | 30°C 2002 | 27°C 1994 | 85% |
| Jul 21 | 29°C | 27°C | 30°C 2019 | 26°C 1994 | 86% |
| Jul 22 | 29°C | 27°C | 30°C 2002 | 26°C 1994 | 85% |
| Jul 23 | 29°C | 27°C | 30°C 2017 | 26°C 1994 | 84% |
| Jul 24 | 29°C | 27°C | 30°C 1992 | 26°C 1997 | 83% |
| Jul 25 | 29°C | 27°C | 31°C 1992 | 27°C 1995 | 83% |
| Jul 26 | 29°C | 27°C | 30°C 2002 | 27°C 2000 | 83% |
| Jul 27 | 29°C | 27°C | 31°C 2002 | 26°C 2003 | 83% |
| Jul 28 | 29°C | 27°C | 30°C 2002 | 26°C 2008 | 83% |
| Jul 29 | 29°C | 27°C | 30°C 2014 | 27°C 2000 | 83% |
| Jul 30 | 29°C | 27°C | 30°C 2017 | 27°C 2004 | 83% |
| Jul 31 | 29°C | 27°C | 30°C 2019 | 27°C 1999 | 83% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+7).
- July 1
- sunrise 6:04 AM, sunset 6:44 PM
- July 31
- sunrise 6:10 AM, sunset 6:43 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.