Keflavík, Iceland — Weather in December 2026

Climate Overview

Keflavík, Iceland in December has cold conditions, with highs averaging around 3.2°C (38°F). Rain falls on about 17 days this month, totalling around 112 mm. Winds are noticeable. Sea temperature stays cool at 5°C (41°F).

This month falls at the beginning of Winter. Cold conditions dominate the month.

Temperatures remain fairly steady throughout December, with daily highs around 3°C (37°F).

December sees fairly even rainfall, totalling about 111 mm across the month.

Expect around 1.7h of sunshine at the start of December, decreasing to 1.1h by the end.

The warmest days tend to fall around the 1th, averaging 4.2°C (40°F).

Compared to November, this month is about 2°C cooler with 1 more rainy days.

Monthly December Averages

Temperature

3°C / 0°C

Feels Like

-2°C / -6°C

Rain

17 days · 112 mm

Sunshine

1.1h / day

Humidity

78% — Humid

Wind

35 km/h

Wind Direction

ENE (76°)

Gusts

54 km/h

Daylight

4.4 h

Cloud Cover

72%

Clear Sky Days

1.8

UV Index

0.1 — Low

Sea Temperature

5°C

Dew Point

-2°C — Dry

Moon Phase

Waxing Crescent · 31%

Snow Days

12 days · 19 cm

Frost Days

14 days

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 11:18

Daylight 4.3h

Sunset 15:36

What to Expect

Cold daytime highs of 3°C (38°F) mean shorter outdoor excursions with warming breaks. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	3°C / 0°C	-3°C / -7°C	19days (124 mm) Wet	1.4h Poor	77% Humid	0.2 Low	Wet	View Details
February	3°C / 0°C	-3°C / -6°C	18days (122 mm) Wet	3.5h Poor	78% Humid	0.8 Low	Wet	View Details
March	4°C / 1°C	-2°C / -6°C	17days (115 mm) Wet	6.7h Fair	76% Humid	1.8 Low	Poor	View Details
April	6°C / 3°C	2°C / -3°C	15days (102 mm) Wet	8.8h Good	78% Humid	3.1 Moderate	Poor	View Details
May	9°C / 5°C	5°C / 0°C	16days (101 mm) Wet	11h Excellent	78% Humid	4 Moderate	Poor	View Details
June best	11°C / 8°C	7°C / 4°C	14days (76 mm) Wet	10.9h Excellent	81% Humid	4.2 Moderate	Fair	View Details
July best	13°C / 10°C	10°C / 6°C	13days (71 mm) Wet	10.6h Excellent	84% Humid	4.1 Moderate	Fair	View Details
August best	12°C / 10°C	10°C / 6°C	13days (87 mm) Wet	9.5h Good	83% Humid	3.3 Moderate	Fair	View Details
September	10°C / 7°C	6°C / 3°C	18days (135 mm) Wet	7.2h Good	81% Humid	2.2 Moderate	Wet	View Details
October	7°C / 5°C	3°C / -1°C	18days (134 mm) Wet	4.5h Fair	81% Humid	1 Low	Wet	View Details
November	5°C / 2°C	0°C / -4°C	16days (111 mm) Wet	1.9h Poor	79% Humid	0.4 Low	Poor	View Details
December	3°C / 0°C	-2°C / -6°C	17days (112 mm) Wet	1.1h Poor	78% Humid	0.1 Low	Poor	View Details

What to Wear

Full winter gear is a must — insulated coat, thermal base layers, warm hat, gloves, and waterproof boots.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Warm coatUmbrellaWaterproof jacketWaterproof shoes

Frequently Asked Questions

Expand all

Is December a good time to visit Keflavík?

December is typically poor for visiting Keflavík, with average highs of 3°C (38°F) and around 17 rainy days. Keflavík, Iceland in December has cold conditions, with highs averaging around 3.2°C (38°F). Rain falls on about 17 days

Does it rain a lot in Keflavík in December?

Keflavík typically sees around 17 rainy days in December with 112 mm (4.4 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Keflavík in December?

Yes, nights in Keflavík during December are cold, averaging 0°C (33°F). Pack warm layers and a coat for evenings.

What should I pack for Keflavík in December?

With highs of 3°C (38°F) and lows of 0°C (33°F) in December, we recommend: Warm coat, Umbrella, Waterproof jacket, Waterproof shoes. Comfortable walking shoes are essential.

Is December among the best months weather-wise in Keflavík?

December is not the most favourable month weather-wise in Keflavík. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Keflavík in December?

The average UV index in Keflavík during December is 0 (low). No special sun protection is needed.

How many hours of daylight are there in Keflavík in December?

Keflavík gets approximately 4 hours of daylight per day in December, with around 1 hours of sunshine.

Does it snow in Keflavík in December?

Yes, Keflavík typically sees around 12 snow days in December with roughly 19 cm (7 in) of snowfall.

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