Keflavík Weather in December
Average highs run from 3°C on December 1 to 3°C on December 31, and lows from 1°C to 0°C. Normal precipitation for the month is 155 mm over about 22 wet days.
December day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
December at a glance
- Average high
- 3°C
- Average low
- 0°C
- Precipitation
- 155 mm
- Reanalysis high
- 10°CDec 5, 2002
- Reanalysis low
- -9°CDec 25, 2015
- Daylight
- 5 h 05 min to 4 h 25 min
- Cloud cover
- 82%
- Humidity
- 88%
- Dew point
- 0°C
- Wind
- 27.7 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 |
|---|---|---|---|---|---|
| Dec 1 | 3°C | 1°C | 8°C 2013 | -5°C 2009 | 68% |
| Dec 2 | 3°C | 1°C | 9°C 2019 | -4°C 2009 | 70% |
| Dec 3 | 3°C | 1°C | 8°C 2019 | -5°C 2018 | 71% |
| Dec 4 | 3°C | 1°C | 8°C 1995 | -6°C 2013 | 72% |
| Dec 5 | 3°C | 1°C | 10°C 2002 | -8°C 2013 | 72% |
| Dec 6 | 3°C | 1°C | 8°C 1998 | -8°C 2013 | 72% |
| Dec 7 | 3°C | 0°C | 8°C 1998 | -7°C 2011 | 71% |
| Dec 8 | 3°C | 0°C | 7°C 2002 | -5°C 1993 | 70% |
| Dec 9 | 3°C | 0°C | 8°C 2001 | -7°C 2011 | 69% |
| Dec 10 | 3°C | 0°C | 9°C 2001 | -7°C 2011 | 69% |
| Dec 11 | 3°C | 0°C | 9°C 2009 | -6°C 2017 | 69% |
| Dec 12 | 3°C | 0°C | 8°C 2009 | -6°C 1996 | 69% |
| Dec 13 | 3°C | 0°C | 8°C 2009 | -5°C 2019 | 69% |
| Dec 14 | 3°C | 0°C | 9°C 1997 | -8°C 2019 | 68% |
| Dec 15 | 3°C | 0°C | 10°C 1997 | -8°C 2014 | 69% |
| Dec 16 | 3°C | 0°C | 8°C 1997 | -8°C 2014 | 68% |
| Dec 17 | 3°C | 0°C | 9°C 2007 | -5°C 1993 | 67% |
| Dec 18 | 3°C | 0°C | 8°C 2007 | -8°C 1999 | 67% |
| Dec 19 | 3°C | 0°C | 8°C 2006 | -7°C 1992 | 67% |
| Dec 20 | 3°C | 0°C | 9°C 2006 | -6°C 1991 | 66% |
| Dec 21 | 3°C | 0°C | 8°C 1997 | -8°C 1993 | 66% |
| Dec 22 | 3°C | 0°C | 9°C 2006 | -8°C 2004 | 66% |
| Dec 23 | 3°C | 0°C | 8°C 2006 | -8°C 2004 | 67% |
| Dec 24 | 3°C | 0°C | 8°C 2006 | -6°C 2004 | 67% |
| Dec 25 | 3°C | 0°C | 8°C 2005 | -9°C 2015 | 67% |
| Dec 26 | 3°C | 0°C | 7°C 1992 | -5°C 1994 | 67% |
| Dec 27 | 3°C | 0°C | 8°C 2016 | -8°C 2001 | 66% |
| Dec 28 | 3°C | 0°C | 7°C 2006 | -7°C 2001 | 65% |
| Dec 29 | 3°C | 0°C | 7°C 2014 | -7°C 2017 | 65% |
| Dec 30 | 3°C | 0°C | 8°C 1991 | -8°C 2000 | 65% |
| Dec 31 | 3°C | 0°C | 7°C 1999 | -7°C 2000 | 66% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT).
- December 1
- sunrise 10:47 AM, sunset 3:52 PM
- December 31
- sunrise 11:21 AM, sunset 3:46 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.