Santa Helena Weather in August
Average highs run from 22°C on August 1 to 26°C on August 31, and lows from 14°C to 16°C. Normal precipitation for the month is 78 mm over about 6 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
- 24°C
- Average low
- 15°C
- Precipitation
- 78 mm
- Reanalysis high
- 34°CAug 31, 1995
- Reanalysis low
- 3°CAug 2, 1991
- Daylight
- 10 h 59 min to 11 h 36 min
- Cloud cover
- 53%
- Humidity
- 74%
- Dew point
- 14°C
- Wind
- 12.2 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 | 22°C | 14°C | 28°C 1995 | 5°C 1993 | 23% |
| Aug 2 | 22°C | 14°C | 30°C 1995 | 3°C 1991 | 24% |
| Aug 3 | 23°C | 14°C | 29°C 1995 | 4°C 1991 | 24% |
| Aug 4 | 23°C | 14°C | 28°C 2003 | 7°C 2019 | 23% |
| Aug 5 | 23°C | 14°C | 29°C 2006 | 7°C 2011 | 23% |
| Aug 6 | 23°C | 14°C | 30°C 2006 | 7°C 2010 | 23% |
| Aug 7 | 23°C | 14°C | 30°C 2006 | 10°C 2010 | 23% |
| Aug 8 | 23°C | 14°C | 30°C 2006 | 7°C 2004 | 23% |
| Aug 9 | 23°C | 14°C | 30°C 2006 | 7°C 2004 | 23% |
| Aug 10 | 23°C | 14°C | 30°C 2017 | 7°C 2003 | 23% |
| Aug 11 | 23°C | 15°C | 32°C 2006 | 7°C 2013 | 24% |
| Aug 12 | 23°C | 15°C | 32°C 2006 | 8°C 2013 | 24% |
| Aug 13 | 24°C | 15°C | 32°C 2006 | 10°C 1992 | 24% |
| Aug 14 | 23°C | 15°C | 31°C 1995 | 7°C 1999 | 24% |
| Aug 15 | 24°C | 15°C | 28°C 2005 | 4°C 1999 | 25% |
| Aug 16 | 24°C | 15°C | 29°C 2007 | 6°C 1999 | 24% |
| Aug 17 | 24°C | 15°C | 29°C 2012 | 9°C 1999 | 22% |
| Aug 18 | 24°C | 15°C | 29°C 2012 | 8°C 2003 | 22% |
| Aug 19 | 24°C | 15°C | 29°C 2012 | 9°C 1993 | 24% |
| Aug 20 | 24°C | 15°C | 28°C 2005 | 9°C 2020 | 24% |
| Aug 21 | 24°C | 15°C | 29°C 2012 | 6°C 2020 | 24% |
| Aug 22 | 24°C | 15°C | 30°C 1995 | 7°C 2020 | 23% |
| Aug 23 | 25°C | 15°C | 30°C 1995 | 9°C 2020 | 22% |
| Aug 24 | 25°C | 16°C | 31°C 1995 | 10°C 2011 | 23% |
| Aug 25 | 25°C | 16°C | 31°C 1995 | 10°C 2005 | 22% |
| Aug 26 | 25°C | 16°C | 31°C 1995 | 6°C 2013 | 21% |
| Aug 27 | 25°C | 16°C | 31°C 1995 | 5°C 2013 | 22% |
| Aug 28 | 25°C | 16°C | 32°C 1995 | 5°C 2013 | 22% |
| Aug 29 | 25°C | 16°C | 32°C 1995 | 7°C 2003 | 22% |
| Aug 30 | 26°C | 16°C | 33°C 1995 | 10°C 2003 | 23% |
| Aug 31 | 26°C | 16°C | 34°C 1995 | 11°C 2003 | 24% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- August 1
- sunrise 7:14 AM, sunset 6:13 PM
- August 31
- sunrise 6:50 AM, sunset 6:26 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.