September · Iceland
Best time to visit Jökulsárlón in September Weather, crowds & prices
Weather in Jökulsárlón in September
Average temperature 6°C, 173 mm of rain, about 3 days with 6+ hours of sunshine and 85% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
4.3/10
Ranked #6 of 12 months
- Avg temp
- 6°C
- Rainfall
- 173 mm
- Humidity
- 85%
- Days with 6h+ sun
- 3
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Jökulsárlón scores 4.3/10 for nature and wildlife travel - an above-average month (#6 of 12). Expect around 6°C, 173 mm of rain, and roughly 3 days with 6+ hours of sunshine this month.
Jökulsárlón is Iceland’s iceberg lagoon-floating blue ice, seals, and Diamond Beach’s ice gems on black sand. Best window: the short high-summer window when daylight peaks.
September in Jökulsárlón: expect compromises
September averages 6°C (42°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 173 mm this is a genuinely wet month: about 3 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 4.3/10 here, 6th of 12 months, against 7.6/10 in the destination's best month.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
Plan for mid-season pricing, with crowds are moderate.
Flexible dates? July scores 3.3 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Jökulsárlón in September?
- In September, Jökulsárlón averages 6°C, 173 mm of rain, and about 3 days with 6+ hours of sunshine. Its climate-comfort score is 4.3/10.
- Is September a good time to visit Jökulsárlón?
- September earns a 4.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Jökulsárlón in September?
- Expect about 173 mm of rain in September. Average humidity is 85% and there are about 3 days with 6+ hours of sunshine.
Curated in Jökulsárlón
Tickets & experiences
Things to do in Jökulsárlón
Jökulsárlón, Iceland. Live activities and tours from GetYourGuide, matched to this destination.