September · Iceland
Best time to visit Þingvellir in September Weather, crowds & prices
Weather in Þingvellir in September
Average temperature 6°C, 116 mm of rain, about 0 days with 6+ hours of sunshine and 87% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
4.4/10
Ranked #6 of 12 months
- Avg temp
- 6°C
- Rainfall
- 116 mm
- Humidity
- 87%
- Days with 6h+ sun
- 0
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Þingvellir scores 4.4/10 for nature and wildlife travel - an above-average month (#6 of 12). Expect around 6°C, 116 mm of rain, and roughly 0 days with 6+ hours of sunshine this month.
Þingvellir is where Iceland’s parliament began-rift valley paths between Eurasian and North American plates. Best window: the short high-summer window when daylight peaks.
September in Þingvellir: expect compromises
September averages 6°C (42°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 116 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 4.4/10 here, 6th of 12 months, against 7.5/10 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 3.1 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Þingvellir in September?
- In September, Þingvellir averages 6°C, 116 mm of rain, and about 0 days with 6+ hours of sunshine. Its climate-comfort score is 4.4/10.
- Is September a good time to visit Þingvellir?
- September earns a 4.4/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Þingvellir in September?
- Expect about 116 mm of rain in September. Average humidity is 87% and there are about 0 days with 6+ hours of sunshine.
Curated in Þingvellir
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Things to do in Þingvellir
Þingvellir, Iceland. Live activities and tours from GetYourGuide, matched to this destination.