Cornwall Weather in August
Average highs run from 26°C on August 1 to 25°C on August 31, and lows from 16°C to 14°C. Normal precipitation for the month is 93 mm over about 16 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
- 25°C
- Average low
- 15°C
- Precipitation
- 93 mm
- Reanalysis high
- 34°CAug 9, 2001
- Reanalysis low
- 8°CAug 27, 2009
- Daylight
- 14 h 41 min to 13 h 18 min
- Cloud cover
- 58%
- Humidity
- 75%
- Dew point
- 15°C
- Wind
- 8.3 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 | 26°C | 16°C | 32°C 2006 | 12°C 1998 | 60% |
| Aug 2 | 26°C | 16°C | 32°C 2001 | 14°C 1996 | 60% |
| Aug 3 | 26°C | 16°C | 30°C 2007 | 13°C 2009 | 61% |
| Aug 4 | 26°C | 16°C | 34°C 2012 | 12°C 2000 | 60% |
| Aug 5 | 26°C | 16°C | 32°C 2001 | 9°C 2013 | 58% |
| Aug 6 | 26°C | 16°C | 32°C 2001 | 9°C 1994 | 58% |
| Aug 7 | 26°C | 16°C | 32°C 2001 | 10°C 2004 | 57% |
| Aug 8 | 26°C | 16°C | 33°C 2001 | 11°C 2004 | 57% |
| Aug 9 | 26°C | 16°C | 34°C 2001 | 11°C 1999 | 56% |
| Aug 10 | 26°C | 16°C | 33°C 2016 | 10°C 1999 | 56% |
| Aug 11 | 26°C | 16°C | 33°C 2016 | 10°C 1996 | 54% |
| Aug 12 | 25°C | 16°C | 31°C 2002 | 8°C 1992 | 52% |
| Aug 13 | 25°C | 15°C | 31°C 2002 | 9°C 2006 | 51% |
| Aug 14 | 25°C | 15°C | 33°C 2002 | 10°C 1992 | 52% |
| Aug 15 | 25°C | 15°C | 31°C 1995 | 11°C 2014 | 53% |
| Aug 16 | 25°C | 15°C | 31°C 2002 | 11°C 1994 | 53% |
| Aug 17 | 25°C | 15°C | 31°C 1995 | 10°C 2000 | 52% |
| Aug 18 | 25°C | 15°C | 31°C 2015 | 10°C 2000 | 50% |
| Aug 19 | 25°C | 15°C | 31°C 2015 | 9°C 2007 | 48% |
| Aug 20 | 25°C | 15°C | 31°C 2016 | 9°C 2008 | 48% |
| Aug 21 | 25°C | 15°C | 30°C 1995 | 9°C 2007 | 47% |
| Aug 22 | 25°C | 15°C | 29°C 2008 | 10°C 2004 | 47% |
| Aug 23 | 25°C | 15°C | 28°C 1999 | 9°C 1994 | 46% |
| Aug 24 | 25°C | 15°C | 31°C 1999 | 8°C 2004 | 46% |
| Aug 25 | 25°C | 14°C | 32°C 2012 | 9°C 1991 | 44% |
| Aug 26 | 25°C | 14°C | 31°C 2012 | 8°C 2017 | 44% |
| Aug 27 | 25°C | 14°C | 31°C 1999 | 8°C 2009 | 45% |
| Aug 28 | 25°C | 14°C | 31°C 2016 | 10°C 1995 | 46% |
| Aug 29 | 25°C | 14°C | 32°C 2018 | 10°C 2012 | 43% |
| Aug 30 | 25°C | 14°C | 31°C 1991 | 9°C 1995 | 42% |
| Aug 31 | 25°C | 14°C | 31°C 2010 | 8°C 2006 | 42% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- August 1
- sunrise 5:44 AM, sunset 8:25 PM
- August 31
- sunrise 6:20 AM, sunset 7:38 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.