Keflavík Weather in August
Average highs run from 13°C on August 1 to 11°C on August 31, and lows from 9°C to 8°C. Normal precipitation for the month is 115 mm over about 19 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
- 12°C
- Average low
- 9°C
- Precipitation
- 115 mm
- Reanalysis high
- 21°CAug 11, 2004
- Reanalysis low
- 4°CAug 26, 1992
- Daylight
- 17 h 54 min to 14 h 39 min
- Cloud cover
- 78%
- Humidity
- 86%
- Dew point
- 8°C
- Wind
- 15.8 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 | 13°C | 9°C | 18°C 2008 | 6°C 2013 | 50% |
| Aug 2 | 13°C | 9°C | 16°C 2019 | 7°C 2007 | 50% |
| Aug 3 | 13°C | 9°C | 16°C 2003 | 7°C 1993 | 52% |
| Aug 4 | 13°C | 9°C | 16°C 1999 | 7°C 1993 | 51% |
| Aug 5 | 13°C | 9°C | 17°C 1999 | 7°C 2013 | 50% |
| Aug 6 | 13°C | 9°C | 16°C 2011 | 5°C 2013 | 50% |
| Aug 7 | 13°C | 9°C | 15°C 2003 | 7°C 2018 | 51% |
| Aug 8 | 13°C | 9°C | 16°C 2010 | 6°C 1997 | 52% |
| Aug 9 | 13°C | 9°C | 19°C 2004 | 6°C 1997 | 52% |
| Aug 10 | 12°C | 9°C | 20°C 2004 | 6°C 1993 | 52% |
| Aug 11 | 12°C | 9°C | 21°C 2004 | 7°C 1993 | 51% |
| Aug 12 | 12°C | 9°C | 19°C 2004 | 6°C 1993 | 53% |
| Aug 13 | 12°C | 9°C | 16°C 2004 | 5°C 1993 | 53% |
| Aug 14 | 12°C | 9°C | 16°C 2004 | 4°C 1993 | 55% |
| Aug 15 | 12°C | 9°C | 15°C 1991 | 5°C 1993 | 54% |
| Aug 16 | 12°C | 9°C | 17°C 2012 | 6°C 1993 | 54% |
| Aug 17 | 12°C | 9°C | 15°C 2003 | 7°C 2002 | 54% |
| Aug 18 | 12°C | 9°C | 17°C 2020 | 7°C 1996 | 54% |
| Aug 19 | 12°C | 9°C | 16°C 2010 | 7°C 2019 | 56% |
| Aug 20 | 12°C | 9°C | 15°C 2016 | 6°C 2013 | 56% |
| Aug 21 | 12°C | 9°C | 15°C 2012 | 5°C 1993 | 56% |
| Aug 22 | 12°C | 9°C | 16°C 2003 | 7°C 1993 | 57% |
| Aug 23 | 12°C | 9°C | 15°C 2017 | 5°C 1997 | 58% |
| Aug 24 | 12°C | 9°C | 16°C 2016 | 6°C 1997 | 60% |
| Aug 25 | 12°C | 9°C | 16°C 2015 | 5°C 1996 | 62% |
| Aug 26 | 12°C | 8°C | 15°C 2003 | 4°C 1992 | 64% |
| Aug 27 | 12°C | 8°C | 14°C 2003 | 5°C 1992 | 64% |
| Aug 28 | 12°C | 8°C | 13°C 1994 | 6°C 1992 | 66% |
| Aug 29 | 11°C | 8°C | 13°C 2004 | 5°C 1992 | 67% |
| Aug 30 | 11°C | 8°C | 13°C 1998 | 5°C 1992 | 68% |
| Aug 31 | 11°C | 8°C | 14°C 2003 | 4°C 2002 | 68% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT).
- August 1
- sunrise 4:38 AM, sunset 10:32 PM
- August 31
- sunrise 6:10 AM, sunset 8:49 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.