Keflavík monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Keflavík

Keflavík average temperature chart (Celsius) Keflavík average temperature chart (Fahrenheit)
Average monthly temperatures in Keflavík (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 1.9 2.7 3 5.5 8.8 11.3 12.9 12.6 9.7 6.6 3.5 2.3
°F 35.4 36.8 37.3 41.8 47.8 52.3 55.2 54.7 49.5 43.8 38.4 36.2

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Keflavík monthly rainfall chart (mm) Keflavík monthly rainfall chart (inches)
Average monthly rainfall in Keflavík (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 105 100 101 83 68 71 67 93 98 125 103 112
inches 4.1 3.9 4 3.2 2.7 2.8 2.6 3.7 3.9 4.9 4.1 4.4
Rainy days 19 19 20 19 16 17 17 17 18 21 18 20

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Keflavík

Keflavík average daily sunshine chart
Average daily sunshine Keflavík
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 0.6 1.4 2.9 4.4 3 0 3 5.5 4 2.5 1.3 0.5

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Keflavík average minimum / maximum temperatures (Celsius) Keflavík average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Keflavík (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -2.6 -1.9 -1.7 0.6 3.6 6.6 8.1 7.9 5.2 2.5 -0.8 -2.4
Max °C 2 2.8 3.1 5.6 8.9 11.4 13 12.7 9.8 6.7 3.6 2.4
Min °F 27.2 28.6 28.9 33 38.5 43.8 46.5 46.2 41.3 36.4 30.6 27.7
Max °F 31.4 32.8 33.2 37.5 43.3 48.1 51 50.5 45.5 40.2 34.6 32.1

Sea temperature

The graph below shows the average sea temperature.

Keflavík average sea temperature chart (Celsius) Keflavík average sea temperature chart (Fahrenheit)
Average sea temperature around Keflavík in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.8 5.5 5.3 5.5 6.5 8.5 10 10.6 9.5 8.1 7.1 6.4
°F 42.5 42 41.6 41.8 43.8 47.2 50 51 49.1 46.7 44.7 43.5

Wind speed

The graph below shows the average wind speed.

Keflavík average winspeed by month (km/h) Keflavík average winspeed by month (mph)
Average wind speed in Keflavík (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 25 26 25 23 20 19 18 18 21 22 23 25
mph 16 16 15 14 12 12 11 11 13 14 15 16

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Keflavík relative humidity averages
Average relative humidity in Keflavík
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
82% 82% 81% 81% 78% 80% 82% 82% 81% 82% 83% 82%

Other monthly averages

UV index Best time to go?

Keflavík weather stats

Keflavík weather statistics
Hottest month: July 12.9°C 55.2°F
Driest month: July 67mm 2.6ins
Sunniest month: May 3hrs
Coldest month: January 1.9°C 35.4°F
Wettest month: October 125mm 4.9ins
Warmest sea: August 10.6°C 51.1°F
Map showing location of Keflavík (64.00492, -22.56242)

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