Annual mean 5°C · wettest around January · prevailing wind E
Warmest
12.7 °C
Coldest
-0.2 °C
Wettest
50%
Windiest
8.5 m/s
Prevailing
E
6.9 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Keflavík over the whole year is 5°C. July is the hottest month, with highs of about 12°C; January is the coldest, with lows of about 0°C. Keflavík has no sharply defined rainy season: the chance of rain on a given day runs from 26% in August, the driest month, to 41% in January, the wettest. Winds in Keflavík are highest in January, averaging 7.4 m/s (27 km/h), and lightest in July, at 5.0 m/s (18 km/h). The prevailing wind is from the E. The clearest skies in Keflavík come in December, when the sky is typically 76% covered; July is the cloudiest month, at 82%.
Month by month Keflavík climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
1°C
0°C
-7°C
41%
78%
7.4 m/s
0
0
0
February
2°C
1°C
-6°C
41%
80%
7.4 m/s
0
0
0
March
3°C
1°C
-4°C
39%
79%
6.7 m/s
0
0
0
April
6°C
4°C
-1°C
32%
80%
6.5 m/s
0
0
5
May
8°C
6°C
2°C
35%
78%
6.2 m/s
0
0
16
June
10°C
8°C
5°C
30%
81%
5.7 m/s
0
0
35
July
12°C
10°C
8°C
32%
82%
5.0 m/s
3
0
59
August
12°C
10°C
7°C
26%
78%
5.4 m/s
2
0
57
September
9°C
7°C
4°C
36%
77%
6.0 m/s
0
0
27
October
7°C
5°C
1°C
37%
81%
6.2 m/s
0
0
8
November
4°C
3°C
-3°C
39%
80%
6.7 m/s
0
0
1
December
1°C
1°C
-6°C
41%
76%
6.7 m/s
0
0
0
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Keflavík weather by season
Year round, Keflavík has days of about 1°C at their warmest in January, its coolest month, and 12°C in July, its warmest; the coolest hours of the day run from 0°C to 10°C through the year, and the average temperature over the year is 5°C around the clock. Rain is most likely around January and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Keflavík weather in winterDecember to February
High 1°CLow 1°CRain 41%
Winter in Keflavík has typical daily highs of about 1°C and lows of about 1°C, with a 41% chance of rain on a given day.
Keflavík weather in springMarch to May
High 6°CLow 3°CRain 35%
Spring in Keflavík has typical daily highs of about 6°C and lows of about 3°C, with a 35% chance of rain on a given day.
Keflavík weather in summerJune to August
High 12°CLow 9°CRain 29%
Summer in Keflavík has typical daily highs of about 12°C and lows of about 9°C, with a 29% chance of rain on a given day.
Keflavík weather in autumnSeptember to November
High 7°CLow 5°CRain 37%
Autumn in Keflavík has typical daily highs of about 7°C and lows of about 5°C, with a 37% chance of rain on a given day.
When is the rainy season in Keflavík?
Keflavík has no sharply defined rainy season: the chance of rain on a given day runs from 26% in August, the driest month, to 41% in January, the wettest.
What time of year is Keflavík windiest?
Winds in Keflavík are highest in January, averaging 7.4 m/s (27 km/h), and lightest in July, at 5.0 m/s (18 km/h). The prevailing wind is from the E.
What is the average temperature in Keflavík year round?
The average temperature in Keflavík over the whole year is 5°C. July is the hottest month, with highs of about 12°C; January is the coldest, with lows of about 0°C.