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Weather in Iceland in May

Facts verified 2026-08-04Updated 2026-08-04Weather

The sunshine summit, charted: 209.0 hours — the whole twelve-month curve on one table, with May at the top — over the year’s driest weeks.

A mirror-still Icelandic lake under a cloudless pale-blue evening sky, twin flat-topped mountains with late snow patches perfectly reflected, and one ring of ripples spreading across the centre.
The sunniest month, in one frame: a windless late-May evening on an Icelandic lake, photographed 26 May. CC0, via Wikimedia Commons.
Short answer

May weather in Iceland is the year’s statistical summit: 209.0 sunshine hours — more than June or July, whole curve charted below — over the driest weeks of the year (52.6 mm), with normals of 4.0–10.1°C and sunsets past 23:00 by month’s end. Records still stretch 20.6 to −7.7°C. Live reading below.

What is the weather in Iceland right now?

TownNowWindSky
Reykjavík7°C5 m/sLight drizzle
Vík7°C10 m/sLight drizzle
Höfn7°C10 m/sClear sky
Borgarnes7°C7 m/sLight drizzle

Live Open-Meteo readings for our reference towns, fetched at render. The full live board — roads, alerts, aurora, webcams — is Iceland Pulse.

May in Reykjavík — the whole table

MetricValueWhat it means
Mean daily high10.1°CDouble digits arrive
Mean daily low4.0°CFrost retreats to the records
Record high20.6°CSummer auditions early
Record low−7.7°COne last bite is possible
Precipitation52.6 mmOne of the year’s driest readings
Sunshine209.0 hTHE summit — see the full curve below

The counterweight rows keep May honest: −7.7°C has happened, and highland nights freeze routinely all month — the reason the hat and gloves ride in the daypack even in the sunniest month. The full-year context: the weather-by-month table.

The sunshine curve — all twelve months

MonthSunshine (h)
January22.6
February61.6
March110.3
April165.1
May209.0◀ the summit
June189.5
July183.1
August164.8
September118.3
October91.6
November39.7
December12.6

Every value from the same IMO 1991–2020 normals table, read the same day. The shape surprises everyone: the curve peaks in May, not midsummer — the driest weeks of the year meeting near-peak day length. June and July have more daylight but more cloud; May converts its hours best.

How much daylight does May have?

DateSunriseSunsetDay length
05-0105:0321:4716 h 44 m
05-1004:3222:1617 h 44 m
05-2003:5922:4918 h 49 m
05-3103:2723:2319 h 56 m

Computed, not copied — sunrise and sunset for 2026 at Reykjavík’s own coordinates (64.15, -21.94), NOAA solar algorithm. May gains 3 h 12 m — and the sunset column is why the aurora takes the month off: no darkness, no show, whatever the sun is doing.

What is late May like?

The night gives up: by the 31st the sun sets at 23:23 and rises at 03:27, and the four hours between are blue twilight rather than darkness. Days run just shy of twenty hours, golden light stretches past 22:00, and the whole paved country — Golden Circle included — fits any itinerary with daylight to spare. The one closed door stays closed: the F-roads wait for June and July.

For the month’s life beyond weather — the terns’ 70,900-kilometre arrival above all — the May pillar carries it; June is where the sun stops setting before midnight altogether.

Cars & campers

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Dacia Duster 4x4
SUV

Dacia Duster 4x4

Cheapest real 4WD in the fleet — gravel, the Westfjords and easy summer F-roads without truck prices.

TransmissionManual
FuelPetrol/diesel
Seats5
Drive4WD
From
5,355 kr6,300 kr/day
Reserve −12%
VW Caravelle
9-seater

VW Caravelle

Whole family or friend group in one car — gear in the back, room to stretch.

TransmissionAutomatic
FuelDiesel
Seats9
Drive2WD
From
12,750 kr15,000 kr/day
Reserve −12%
Key Camper Wild Duo
Camper

Key Camper Wild Duo

Sleep right by the trailhead, wake up at the falls — F-road ready from mid-June.

TransmissionManual
FuelPetrol
Sleeps2
Drive4WD
From
5,304 kr6,240 kr/day
Reserve −12%

May weather — questions people actually ask

What is the weather like in Iceland in May?
The year at its statistical best: 209.0 sunshine hours — more than any other month, June and July included — over one of the driest readings in the table (52.6 mm across 11 wet days), with normals of 4.0°C to 10.1°C and days stretching from sixteen hours to nearly twenty. Wind remains the wildcard it always is, but May's odds of a blue-sky day beat high summer's. The crowds have not caught on; the statistics have.
What is the temperature in Iceland in May?
Normals of 4.0°C to 10.1°C in Reykjavík — the first double-digit daily highs of the year — with records marking the honest edges: 20.6°C on a gifted afternoon, −7.7°C at the cold extreme, usually early in the month or inland. Frost retreats to the records but hasn't signed its surrender; highland nights still freeze routinely. A warm layer under a windproof shell covers the whole span.
Is May really the sunniest month in Iceland?
Yes — and the full twelve-month sunshine column on this page shows it rather than asserts it: May's 209.0 hours tops June (189.5), July (183.1) and August (164.8) on the official 1991–2020 normals. The mechanism is May's pairing of near-peak day length with the year's driest weeks — more clear sky, more hours for the sun to use it. It is the best-kept statistic in the Icelandic calendar.
What is late May like in Iceland?
The night functionally ends: by the 31st the computed table shows sunset at 23:23 and sunrise at 03:27 — the four hours between are blue twilight, not darkness. Days run just shy of twenty hours, the countryside is fully green, and the light works double shifts for photographers: golden hour stretches past 22:00. Bring an eye mask; the sky no longer respects bedtime.
Does it rain much in Iceland in May?
The least of almost any month: 52.6 mm over about 11 wet days, the driest stretch of the Icelandic year alongside June. Showers still cross — this is Iceland — but they pass quickly and clear brilliantly, and multi-day soaks are rare. The practical outcome pairs with the sunshine summit: May plans survive contact with the forecast more often than any other month's.
What should I wear in Iceland in May?
Spring kit with backup: a warm mid-layer and windproof waterproof shell as constants, a t-shirt underneath for the gifted afternoons, gloves and hat relegated to the daypack but not the suitcase — the −7.7°C record explains why. Sunglasses stop being optional in the sunniest month. Boots still beat trainers on trails wet with melt. And the swimsuit earns its keep in every month; May's bright evenings make pool visits scenic.
Can you see the northern lights in Iceland in May?
No — and the computed table explains it without appeal: with sunset after 21:45 from the first of the month and no true darkness between the twilights, there is nothing dark for an aurora to appear against, regardless of solar activity. The season closed in April and reopens when real night returns at the end of August. From September to March, the odds come back in force.

Photograph: a windless late-May evening on an Icelandic lake (26 May), CC0, via Wikimedia Commons. Climate normals 1991–2020 (including the record rows and all twelve sunshine values): Icelandic Met Office, as published in the Reykjavík climate table, read 4 August 2026. Daylight computed at render (NOAA solar algorithm, Reykjavík coordinates; Iceland keeps UTC year-round). Live reading: Open-Meteo via our Pulse feed at render time, shown only when the feed answers.

Iceland nowfrom 19 Sep 06:10
8°C · overcastWind 2 m/sRing Road (R1) openAurora Kp 2.67Daylight 07:02 – 19:39Webcams