What to expect in Reykjavík in September
September is a strong choice for Reykjavík: 11° / 5°, with manageable crowds at the big attractions and prices close to the yearly average.
Reykjavík weather in September
Typical conditions in Reykjavík during September, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 11°C 52°F |
|---|---|
| Average low | 5°C 41°F |
| Rainfall | Wet 65/100 |
| Total rainfall | 67 mm2.6 in |
| Rainy days | 12 |
| Sea temperature | 10°C 50°F |
| Daylight | 13 h 4 min |
| How it feels | Cool |
Average highs sit around 11°C with lows near 5°C. Expect a fair amount of rain, so plan indoor backups.
Crowds & demand
Crowd levels are Moderate for Reykjavík — manageable crowds at the big attractions.
Prices & value
This month counts as shoulder season: prices close to the yearly average.
What to pack
Proper cold-weather kit — a warm mid-layer, windproof outer, hat and gloves. Days peak near 11°C and nights fall to about 5°C. Add a compact rain shell and shoes you do not mind soaking; this is one of the wetter months.
What it costs
Costs in September sit around the yearly average for Reykjavík — neither a bargain nor a squeeze. Booking a few weeks out is usually enough. Compared with the most expensive month of the year, you are looking at roughly 35% less.
Who this month suits
- Travellers who want the most reliable weather
- Anyone travelling on a budget
- Visitors who want to catch a festival
Events & what’s on
Look out for Northern Lights Season while you’re there.
- Northern Lights Season — Aurora borealis visible on clear dark nights away from city lights.
Reykjavík in September compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| July | 15° / 9° | High | $$$ | 32 |
| August | 14° / 8° | High | $$$ | 33 |
| September · This month | 11° / 5° | Moderate | $$ | 43 |
| October | 7° / 2° | Moderate | $$ | 44 |
| November | 4° / 0° | Low | $ | 45 |
These months score higher for Reykjavík on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in September
If the destination is negotiable but the month is not, these places are at their best in September.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
