Best Time to Visit Iceland

Photo by Einar H. Reynis on Unsplash

June and July are the best months to visit Iceland. July is the warmest month Reykjavik gets — highs of 13.6°C (56.5°F) and lows of 9.8°C (49.6°F) — and although it records 18 rainy days, those days only total 77.4mm (3.0 in), which works out to about 4mm per wet day. June is nearly identical in rainfall (78.0mm / 3.1 in over 15 days) with highs of 10.8°C (51.4°F), and it comes with the longest daylight of the year. The trade-off is simple: Iceland's driest, brightest window is also its most expensive and most crowded.

The best months: June and July

The first thing to understand about Icelandic summer is that it is not warm. July, the peak, tops out at an average high of 13.6°C (56.5°F) and drops only to 9.8°C (49.6°F) overnight. That 3.8-degree gap between day and night is the smallest of any month in the table — the ocean holds the temperature steady in both directions. There is no afternoon heat and no cold snap at 2am. You wear roughly the same clothing at noon and at midnight.

August is statistically tied for warmth (13.7°C / 56.7°F high, 9.7°C / 49.5°F low) but it is a much wetter month: 153.1mm (6.0 in) over 19 days, roughly double June's total. That is the split that matters. June and July give you 77–78mm of rain; August gives you 153mm. Same temperature, twice the water.

June's advantage over July is rain frequency. June has 15 rainy days versus July's 18 — meaning 15 dry days in June and 13 in July. Neither is a lot, but June is the closest Iceland gets to a reliably dry summer month while still having full midnight-sun daylight. Around the solstice, Reykjavik never gets properly dark, which means you can drive the Ring Road at 11pm and still see the road, the waterfalls, and the sheep.

What the 4mm-per-rainy-day figure in July actually means on the ground: expect a grey, damp, blowing drizzle that starts and stops several times in a day rather than a downpour that ruins the afternoon. You do not shelter from July rain in Iceland — you walk through it in a shell jacket and it stops before you notice.

The months to avoid: January, September, and October

Iceland never gets hot, so nothing is ruled out by heat. What rules out months is water, darkness, and wind.

January is the wettest month of the year by volume: 209.2mm (8.2 in) across 18 rainy days — about 11.6mm per wet day, more than double July's rate. It is also the coldest, with a high of 1.1°C (34.0°F) and a low of -4.1°C (24.6°F). That combination — temperature hovering right at freezing with heavy precipitation — is the worst one for driving. Rain falls, the surface drops below zero overnight, and roads glaze. Add roughly four to five hours of usable daylight and you have a month where you can realistically see one or two things a day.

September is the sneakiest month to get wrong, because the temperature still reads fine: 11.6°C (52.9°F) high, 6.6°C (43.9°F) low, roughly May's numbers. But it has 22 rainy days — the most of any month — leaving just 8 dry days in the whole month. At 188.1mm (7.4 in), that is 8.6mm per wet day, twice July's intensity. Statistically, if you book a week in September, you should plan for five or six of those days to be wet. People book it for the shoulder-season prices and the returning aurora and are then surprised when three consecutive days of hiking get rained out.

October is the same problem with less warmth: 156.9mm (6.2 in) over 20 days, high 6.6°C (43.9°F), low 2.7°C (36.9°F). Days are shortening fast, the highlands are closing, and you are paying for a wet month without the compensation of long light.

February deserves a note too. Its 21 rainy days leave only 7 dry days, the fewest of any month, though the total (195.1mm / 7.7 in) is spread more thinly than January's.

Shoulder season: April, May, and the November surprise

April is the best-value month in Iceland. It records just 73.3mm (2.9 in) of rain over 14 days — the lowest rainfall total of any month except November, and less than any summer month. The high is 8.1°C (46.6°F) with a low of 2.6°C (36.7°F), so it is cold but not freezing, and daylight is already back to a comfortable 13–15 hours by mid-month. You get 16 dry days, more than June or July, at pre-season prices. The catch is that the interior highland F-roads are still closed and some remote guesthouses have not opened yet, so April is a coastal and Ring Road month, not a highland one.

May is the transitional month: 11.1°C (52.0°F) high, 6.1°C (43.0°F) low, 99.2mm (3.9 in) over 16 days. Notice that May's average high (11.1°C) is actually slightly higher than June's (10.8°C) in this data, so you are not sacrificing warmth by going a month early. May costs less than June, has 15 dry days, and daylight is already near-summer length. If June's prices put you off, May is a very small step down.

November is the statistical outlier in this table. It is the driest month of the year — 57.0mm (2.2 in) over 11 rainy days — which is a quarter of January's rainfall and fewer wet days than any other month. That leaves 19 dry days, the most in the year. Temperatures are cold but not extreme: 2.9°C (37.2°F) high, -1.3°C (29.7°F) low. What you give up is light — November is deep into the short-day season — but if your priority is aurora viewing, a dry month with clear-sky potential and long nights is precisely what you want, and November is by far the cheapest month with those conditions. December, by comparison, is warmer (4.7°C / 40.5°F high) but far wetter at 137.3mm (5.4 in) over 18 days, meaning more cloud between you and the sky.

What each season actually means for your trip

Summer (June–August). You are hiking, driving the full Ring Road, and reaching the highlands once the F-roads open in late June. You wear a base layer, a fleece, and a waterproof shell — all three, most days, because 13.6°C (56.5°F) with wind off the North Atlantic feels considerably colder than 13.6°C anywhere inland. Waterproof trousers earn their weight in August's 153.1mm. Bring a sleep mask: with the sun barely setting, blackout curtains in guesthouses are inconsistent. Do not bring shorts and do not bring a heavy parka.

Autumn (September–October). You are doing shorter day trips with a fallback plan. With 22 rainy days in September and 20 in October, you plan two outdoor targets a day and accept that one may be scrubbed. Waterproof boots, not water-resistant ones. Aurora season begins as nights lengthen, but September's cloud cover works against you. Costs drop noticeably.

Winter (November–February). You are aurora hunting, visiting ice caves, and doing a small number of things per day around four to six hours of light. Layers plus insulation plus a windproof outer shell; traction cleats for icy paths. January's 1.1°C/-4.1°C (34.0°F/24.6°F) freeze–thaw cycle means car rental with proper winter tyres is non-negotiable, and you should check road conditions every single morning. November stands apart here as the dry one.

Spring (March–May). March is still wet (160.3mm / 6.3 in over 19 days) and cold at 5.7°C (42.3°F). April flips it — 73.3mm and 16 dry days. You are back to full-day itineraries, coastal drives, waterfalls at peak meltwater volume, and puffins arriving toward late spring. Warm layers still, but you can leave the heavy winter gear at home from April onward.

Month-by-month

• January — Coldest and wettest: 1.1°C/-4.1°C (34.0°F/24.6°F), 209.2mm over 18 days. Aurora season, but icy roads and minimal daylight.
• February — 4.8°C/0.7°C (40.6°F/33.3°F), 195.1mm over 21 days. Only 7 dry days — the fewest all year.
• March — 5.7°C/0.9°C (42.3°F/33.6°F), 160.3mm over 19 days. Light returns fast, but still a wet month.
• April — 8.1°C/2.6°C (46.6°F/36.7°F), just 73.3mm over 14 days. Best value in the year; highlands still closed.
• May — 11.1°C/6.1°C (52.0°F/43.0°F), 99.2mm over 16 days. Warmer average high than June, at lower prices.
• June — 10.8°C/6.2°C (51.4°F/43.2°F), 78.0mm over 15 days. Midnight sun, driest summer month.
• July — Warmest: 13.6°C/9.8°C (56.5°F/49.6°F), 77.4mm over 18 days at only ~4mm each — drizzle, not downpours.
• August — 13.7°C/9.7°C (56.7°F/49.5°F) but 153.1mm over 19 days. Same warmth as July, double the rain.
• September — 11.6°C/6.6°C (52.9°F/43.9°F), 188.1mm over 22 days. Mild-looking, but wet 2 days in 3.
• October — 6.6°C/2.7°C (43.9°F/36.9°F), 156.9mm over 20 days. Wet and darkening.
• November — Driest month: 57.0mm over 11 days, 2.9°C/-1.3°C (37.2°F/29.7°F). 19 dry days, cheap, dark — best budget aurora month.
• December — 4.7°C/0.9°C (40.5°F/33.6°F), 137.3mm over 18 days. Milder than January but cloudy.

FAQ

What is the warmest month in Iceland?

August, barely — average high 13.7°C (56.7°F) against July's 13.6°C (56.5°F). The difference is a tenth of a degree and meaningless in practice. July is the better pick because it gets 77.4mm (3.0 in) of rain versus August's 153.1mm (6.0 in). Iceland has no month with an average high above 13.7°C (56.7°F), so pack for cool weather regardless of when you go.

When is the cheapest time to visit Iceland with decent weather?

April. It is off-peak on price but records the second-lowest rainfall of the year at 73.3mm (2.9 in) over 14 days, giving you 16 dry days — more than July's 13. Highs of 8.1°C (46.6°F) mean you need proper layers, but the days are long enough for full itineraries. November is cheaper still and even drier (57.0mm over 11 days), but you are trading almost all your daylight away.

Does it rain every day in Iceland?

No, but in some months it is close. September has 22 rainy days out of 30 and February has 21 out of 28, so those months leave you 8 and 7 dry days respectively. The best months for dry days are November (19), April (16), and May and June (15 each). The more useful question is intensity: July's 18 rainy days average about 4mm each, while January's 18 average about 12mm each. Same count, completely different day.

When can I see the northern lights?

You need dark skies, so aurora viewing runs from roughly September through April and is impossible in June and July, when Reykjavik barely gets dark at all. Within that window, weather matters more than season: you want clear skies, which favours November — the driest month at 57.0mm (2.2 in) over 11 days, with 19 dry days. September and October have long nights returning but are heavily clouded (188.1mm and 156.9mm respectively), so you will spend a lot of evenings looking at overcast.

Climate figures are measured monthly averages for Reykjavik, 2025. Conditions vary significantly by region — the north and east coasts and the highlands differ from the capital. Always check current road and weather conditions before travelling in winter.