September · Iceland
Best time to visit Gullfoss in September Weather, crowds & prices
Weather in Gullfoss in September
Average temperature 3°C, 144 mm of rain, about 0 days with 6+ hours of sunshine and 91% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
3.5/10
Ranked #6 of 12 months
- Avg temp
- 3°C
- Rainfall
- 144 mm
- Humidity
- 91%
- Days with 6h+ sun
- 0
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Gullfoss scores 3.5/10 for nature and wildlife travel - an above-average month (#6 of 12). Expect around 3°C, 144 mm of rain, and roughly 0 days with 6+ hours of sunshine this month.
Gullfoss tumbles in two wide tiers into a canyon on the Hvítá river, part of Iceland's Golden Circle route.
September in Gullfoss — the hardest end of the year
At 3°C (38°F) this is proper winter weather in September: layer up and split the day between outdoor highlights and indoor stops.
144 mm of rain signals a properly wet month, with only almost no days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 3.5/10 on the same scale — 6th of 12 months, versus 6.6/10 for the best month here.
Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.
Budget for mid-season pricing, and crowds are moderate.
If your dates are flexible, July is materially better in Gullfoss — 3.1 points higher on the same scale.
Frequently asked
- What is the weather like in Gullfoss in September?
- In September, Gullfoss averages 3°C, 144 mm of rain, and about 0 days with 6+ hours of sunshine. Its climate-comfort score is 3.5/10.
- Is September a good time to visit Gullfoss?
- September earns a 3.5/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Gullfoss in September?
- Expect about 144 mm of rain in September. Average humidity is 91% and there are about 0 days with 6+ hours of sunshine.
Curated in Gullfoss
Tickets & experiences
Things to do in Gullfoss
Gullfoss, Iceland. Live activities and tours from GetYourGuide, matched to this destination.