Iceland · Month comparison
April vs September
September ranks #1 overall vs April at #7. Aurora returns, autumn colours explode, crowds drop — the most atmospheric month in Iceland.
April
#7 of 12 months
Best match
Spring thaw, puffins arriving, no more aurora — quiet between two very different Icelands.
- ↑Puffins arrive at Látrabjarg cliffs and Westfjords from late April — first chance for puffin watching
- ↑Spring thaw makes landscapes dramatic: waterfalls at high flow, snow on peaks, green valleys emerging
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 | April | September |
|---|---|---|
| Weather score | 5 | 6 |
| Value score | 7 | 6 |
| Crowd score | 7 | 7 |
| Events score | 6 | 7 |
| Atmosphere | 7 | 9 |
| Avg high temp | 7°C | 10°C |
| Monthly rain | 58mm | 67mm |
| Daily sunshine | 9.5hrs | 8.5hrs |
April trade-offs
- ↓Aurora season is over — nights are now too short and too bright for sightings
- ↓Snow melt makes gravel F-roads muddy and largely inaccessible; highland access still blocked
- ↓Weather remains unpredictable: sleet, wind, and sun can all occur on the same day
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 →