Hafnarfjörður, Iceland — Weather in May 2027

Climate Overview

Hafnarfjörður, Iceland in May has cold conditions, with highs averaging around 10°C (50°F). Rain falls on about 18 days this month, totalling around 109 mm. Sea temperature stays cool at 7.5°C (46°F).

This month falls at the end of Spring.

Daily highs in May gradually rise from around 8°C (47°F) at the start to 11°C (52°F) by month's end.

Rainfall is heaviest during the last third of the month, while the first third tends to be drier.

Expect around 10.5h of sunshine at the start of May, decreasing to 9.8h by the end.

The warmest days tend to fall around the 21th, averaging 11.5°C (53°F).

Compared to April, this month is about 3°C warmer with 3 more rainy days. Temperatures will rise further into June.

Monthly May Averages

Temperature

10°C / 4°C

Feels Like

7°C / 1°C

Rain

18 days · 109 mm

Sunshine

10.9h / day

Humidity

78% — Humid

Wind

21 km/h

Wind Direction

SSE (155°)

Gusts

46 km/h

Daylight

18.5 h

Cloud Cover

76%

Clear Sky Days

1.4

UV Index

3.9 — Moderate

Sea Temperature

8°C

Dew Point

4°C — Dry

Moon Phase

Waxing Gibbous · 66%

Snow Days

3 days · 1.6 cm

Frost Days

3 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 04:16

Daylight 18.3h

Sunset 22:35

What to Expect

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.

2 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	1°C / -4°C	-4°C / -10°C	18days (127 mm) Wet	1.4h Poor	82% Humid	0.2 Low	Wet	View Details
February	2°C / -3°C	-3°C / -8°C	18days (131 mm) Wet	3.5h Poor	83% Humid	0.8 Low	Wet	View Details
March	3°C / -2°C	-1°C / -7°C	18days (118 mm) Wet	6.6h Fair	79% Humid	1.8 Low	Wet	View Details
April	7°C / 1°C	3°C / -3°C	15days (109 mm) Wet	8.7h Good	79% Humid	3.2 Moderate	Poor	View Details
May	10°C / 4°C	7°C / 1°C	18days (109 mm) Wet	10.9h Excellent	78% Humid	3.9 Moderate	Wet	View Details
June best	13°C / 7°C	10°C / 4°C	15days (86 mm) Wet	10.8h Excellent	79% Humid	4.1 Moderate	Fair	View Details
July best	15°C / 9°C	13°C / 7°C	14days (73 mm) Wet	10.5h Excellent	81% Humid	3.9 Moderate	Fair	View Details
August best	14°C / 9°C	12°C / 6°C	14days (90 mm) Wet	9.5h Good	82% Humid	3.2 Moderate	Fair	View Details
September	11°C / 6°C	8°C / 2°C	18days (133 mm) Wet	7.2h Good	85% Humid	2.2 Moderate	Wet	View Details
October	7°C / 3°C	3°C / -2°C	17days (127 mm) Wet	4.5h Fair	86% Very Muggy	1 Low	Poor	View Details
November	3°C / -1°C	-1°C / -5°C	14days (102 mm) Wet	1.9h Poor	85% Humid	0.4 Low	Poor	View Details
December	1°C / -3°C	-3°C / -8°C	16days (110 mm) Wet	1.1h Poor	83% 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

Layered clothingLight jacketUmbrellaWaterproof jacketWaterproof shoes

Frequently Asked Questions

Expand all

Is May a good time to visit Hafnarfjörður?

May is typically wet for visiting Hafnarfjörður, with average highs of 10°C (50°F) and around 18 rainy days. Hafnarfjörður, Iceland in May has cold conditions, with highs averaging around 10°C (50°F). Rain falls on about 18 days

Does it rain a lot in Hafnarfjörður in May?

Hafnarfjörður typically sees around 18 rainy days in May with 109 mm (4.3 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Hafnarfjörður in May?

Yes, nights in Hafnarfjörður during May are cold, averaging 4°C (40°F). Pack warm layers and a coat for evenings.

What should I pack for Hafnarfjörður in May?

With highs of 10°C (50°F) and lows of 4°C (40°F) in May, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. Comfortable walking shoes are essential.

Is May among the best months weather-wise in Hafnarfjörður?

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

What is the UV index in Hafnarfjörður in May?

The average UV index in Hafnarfjörður during May is 4 (moderate). Sunscreen and sunglasses are recommended during midday hours.

How many hours of daylight are there in Hafnarfjörður in May?

Hafnarfjörður gets approximately 19 hours of daylight per day in May, with around 11 hours of sunshine.

Does it snow in Hafnarfjörður in May?

Yes, Hafnarfjörður typically sees around 3 snow days in May with roughly 2 cm (1 in) of snowfall.

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