September · Iceland
Best time to visit Reykjavik in September Weather, crowds & prices
Weather in Reykjavik in September
Average temperature 8°C, 128 mm of rain, about 0 days with 6+ hours of sunshine and 86% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
4.7/10
Ranked #6 of 12 months
- Avg temp
- 8°C
- Rainfall
- 128 mm
- Humidity
- 86%
- Days with 6h+ sun
- 0
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Reykjavik scores 4.7/10 for nature and wildlife travel - an above-average month (#6 of 12). Expect around 8°C, 128 mm of rain, and roughly 0 days with 6+ hours of sunshine this month.
Northern lights nearby and geothermal days peak in the bright June-August window.
September in Reykjavik: expect compromises
September averages 8°C (46°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 128 mm this is a genuinely wet month: almost no days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 4.7/10 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 2.9 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Reykjavik in September?
- In September, Reykjavik averages 8°C, 128 mm of rain, and about 0 days with 6+ hours of sunshine. Its climate-comfort score is 4.7/10.
- Is September a good time to visit Reykjavik?
- September earns a 4.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Reykjavik in September?
- Expect about 128 mm of rain in September. Average humidity is 86% and there are about 0 days with 6+ hours of sunshine.
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