Iceland · Month comparison
July vs September
September ranks #1 overall vs July at #12. Aurora returns, autumn colours explode, crowds drop — the most atmospheric month in Iceland.
July
#12 of 12 months
Strong option
Warmest month, every road open — absolute peak for crowds and prices.
- ↑Warmest temperatures of the year (14°C): most comfortable conditions for hiking and outdoor activities
- ↑All roads and trails fully open: full Laugavegur Trail, Fimmvörðuháls, and Kjölur highland route accessible
September
#1 of 12 months
Best match
Aurora returns, autumn colours explode, crowds drop — the most atmospheric month in Iceland.
- ↑Aurora borealis returns from early September as nights grow long enough — first sightings of the new season
- ↑Autumn colours (yellows, reds, oranges across the highlands) peak in September — uniquely photogenic landscapes
| Factor | July | September |
|---|---|---|
| Weather score | 8 | 6 |
| Value score | 1 | 6 |
| Crowd score | 2 | 7 |
| Events score | 7 | 7 |
| Atmosphere | 7 | 9 |
| Avg high temp | 14°C | 10°C |
| Monthly rain | 52mm | 67mm |
| Daily sunshine | 12.8hrs | 8.5hrs |
July trade-offs
- ↓Peak prices across the board: accommodation, car hire, tours, and flights all at annual maximums
- ↓Most popular sites — Seljalandsfoss, Skógafoss, Jökulsárlón — crowded throughout the day
- ↓No aurora whatsoever; midnight sun means the sky never darkens
September trade-offs
- ↓Temperatures drop quickly (10°C high); warm layers essential and weather windows shorter
- ↓Highland F-roads closing progressively through September — some interior routes blocked by late month
- ↓Aurora is back but not yet at winter frequency — nights still shorter than January–March
Scores compare months within Iceland. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →