Saint Helier Weather in August
Average highs run from 20°C on August 1 to 19°C on August 31, and lows from 16°C to 16°C. Normal precipitation for the month is 53 mm over about 9 wet days.
August day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
August at a glance
- Average high
- 20°C
- Average low
- 16°C
- Precipitation
- 53 mm
- Reanalysis high
- 32°CAug 9, 2003
- Reanalysis low
- 13°CAug 1, 2007
- Daylight
- 15 h 07 min to 13 h 30 min
- Cloud cover
- 64%
- Humidity
- 82%
- Dew point
- 15°C
- Wind
- 18.4 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 |
|---|---|---|---|---|---|
| Aug 1 | 20°C | 16°C | 27°C 2004 | 13°C 2007 | 33% |
| Aug 2 | 20°C | 16°C | 26°C 2004 | 13°C 2015 | 33% |
| Aug 3 | 20°C | 16°C | 27°C 1995 | 14°C 2009 | 33% |
| Aug 4 | 20°C | 16°C | 28°C 2003 | 15°C 1996 | 33% |
| Aug 5 | 20°C | 16°C | 30°C 2003 | 14°C 2015 | 33% |
| Aug 6 | 20°C | 16°C | 25°C 2020 | 14°C 1993 | 33% |
| Aug 7 | 20°C | 16°C | 31°C 2020 | 14°C 2012 | 34% |
| Aug 8 | 20°C | 16°C | 28°C 1992 | 15°C 2011 | 34% |
| Aug 9 | 20°C | 16°C | 32°C 2003 | 14°C 2017 | 35% |
| Aug 10 | 20°C | 16°C | 25°C 1997 | 14°C 2016 | 34% |
| Aug 11 | 20°C | 16°C | 29°C 2020 | 14°C 2017 | 34% |
| Aug 12 | 20°C | 16°C | 23°C 2003 | 15°C 1993 | 35% |
| Aug 13 | 20°C | 16°C | 23°C 2003 | 14°C 1993 | 35% |
| Aug 14 | 20°C | 16°C | 25°C 2001 | 14°C 2010 | 34% |
| Aug 15 | 20°C | 16°C | 23°C 2001 | 14°C 1992 | 35% |
| Aug 16 | 20°C | 16°C | 26°C 1997 | 15°C 2015 | 36% |
| Aug 17 | 20°C | 16°C | 25°C 2012 | 15°C 2015 | 36% |
| Aug 18 | 20°C | 16°C | 25°C 1996 | 15°C 2006 | 38% |
| Aug 19 | 20°C | 16°C | 26°C 1996 | 14°C 1991 | 37% |
| Aug 20 | 20°C | 16°C | 25°C 1997 | 14°C 2014 | 37% |
| Aug 21 | 20°C | 16°C | 27°C 1991 | 14°C 2014 | 35% |
| Aug 22 | 20°C | 16°C | 24°C 2017 | 14°C 1999 | 35% |
| Aug 23 | 20°C | 16°C | 25°C 2016 | 14°C 1993 | 34% |
| Aug 24 | 20°C | 16°C | 26°C 2019 | 14°C 2014 | 33% |
| Aug 25 | 20°C | 16°C | 24°C 2000 | 14°C 1993 | 32% |
| Aug 26 | 20°C | 16°C | 23°C 2001 | 14°C 1993 | 31% |
| Aug 27 | 20°C | 16°C | 26°C 2003 | 14°C 1996 | 30% |
| Aug 28 | 20°C | 16°C | 24°C 2017 | 14°C 1993 | 31% |
| Aug 29 | 19°C | 16°C | 22°C 2005 | 14°C 1993 | 32% |
| Aug 30 | 19°C | 16°C | 25°C 2005 | 14°C 2017 | 31% |
| Aug 31 | 19°C | 16°C | 24°C 2005 | 13°C 2012 | 30% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+1).
- August 1
- sunrise 5:41 AM, sunset 8:48 PM
- August 31
- sunrise 6:23 AM, sunset 7:53 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.