September in Reykjavik averages highs of 10 °C (51 °F) and lows of 6 °C (42 °F), with about 15 rainy days and 12 h 52 min of daylight.
September weather in Reykjavik at a glance
average high to low each dot ≈ 3 rainy days
Is September a good time to visit Reykjavik?
Tough month: cold and wet. September is usually shoulder season in Reykjavik: fewer crowds than peak months, with prices often a little lower.
Our rule: a month scores 2 points for comfortable average highs of 18–28 °C (1 point for 14–18 or 28–32 °C) and 2 points for 5 or fewer rainy days (1 point for 6–10). Average highs above 35 °C or below 8 °C make it a tough month whatever the rain. A rainy day here means 2 mm of rain or more. 4 points = great, 3 = good, 2 = mixed, 0–1 = tough.
Holidays and events in September 2026
- Northern lights season: on clear, dark nights the aurora can appear (tours leave the city to escape light pollution). season
Banks and many shops close on public holidays, and museums may change their hours, so check before you go.
Things to do in Reykjavik in September
With frequent rain in September, here are the indoor picks first, then the outdoor ones for drier spells.
- Hallgrímskirkja — tower view indoors
- Harpa concert hall indoors
- Golden Circle — Þingvellir, Geysir and Gullfoss outdoors
- Sky Lagoon or Blue Lagoon — geothermal pools outdoors
- Whale watching — from the old harbour outdoors
- Northern lights tour — dark months, clear nights only outdoors
Where to stay: Downtown (101) near Laugavegur for everything on foot.
What to pack for Reykjavik in September
- A warm jacket and layers; evenings drop to around 6 °C (42 °F).
- An umbrella or a light waterproof: about 15 days this month see real rain.
- Comfortable walking shoes.
What a day in Reykjavik costs
| Budget traveller | Mid-range | |
|---|---|---|
| Typical total per person, per day | €90–190 | €230–450 |
Excluding flights. September is usually shoulder season in Reykjavik: fewer crowds than peak months, with prices often a little lower.
September in nearby cities
| City | High / low | Rainy days | Verdict |
|---|---|---|---|
| Edinburgh | 16° / 10° | 10 | Tough month |
| Dublin | 17° / 11° | 10 | Mixed weather |
| London | 20° / 11° | 8 | Good time to go |
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FAQ
Is September a good time to visit Reykjavik?
By the numbers, September is a tough month: cold and wet, with average highs of 10 °C (51 °F) and about 15 rainy days. September is usually shoulder season in Reykjavik: fewer crowds than peak months, with prices often a little lower. The best months for weather are June, July, August (the mildest; no month is easy here).
How warm is Reykjavik in September?
Average highs are 10 °C (51 °F) and lows 6 °C (42 °F) (2015–2024 averages).
Does it rain a lot in Reykjavik in September?
Expect about 15 days with 2 mm of rain or more, about 137 mm in total. It is the 5th wettest month of the year in Reykjavik.
Sources: climate averages from Open-Meteo historical weather (ERA5 reanalysis, 2015–2024); sea temperatures from the Open-Meteo marine API (2023–2024); public holidays from Nager.Date. Daylight is calculated for the 15th of the month. Averages are a guide, not a forecast. Costs are typical ranges per person per day, excluding flights.