May · Iceland
Best time to visit Selfoss in May Weather, crowds & prices
Weather in Selfoss in May
Average temperature 7°C, 144 mm of rain, about 15 days with 6+ hours of sunshine and 85% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
5.1/10
Ranked #4 of 12 months
- Avg temp
- 7°C
- Rainfall
- 144 mm
- Humidity
- 85%
- Days with 6h+ sun
- 15
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Selfoss scores 5.1/10 for sightseeing and cultural travel - an above-average month (#4 of 12). Expect around 7°C, 144 mm of rain, and roughly 15 days with 6+ hours of sunshine this month.
Selfoss is South Iceland’s service town on the Ölfusá-base for Golden Circle and south-coast waterfall loops. Best window: the short high-summer window when daylight peaks.
May in Selfoss: mixed conditions, plan around the weather
Expect 7°C (44°F) in May. A good month for city streets, viewpoints and long meals; leave swimming for another season.
144 mm of rain signals a properly wet month, with only about 15 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 5.1/10 on the same scale — 4th of 12 months, versus 6.9/10 for the best month here.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
Budget for mid-season pricing, and crowds are moderate.
If your dates are flexible, July is materially better in Selfoss — 1.8 points higher on the same scale.
Frequently asked
- What is the weather like in Selfoss in May?
- In May, Selfoss averages 7°C, 144 mm of rain, and about 15 days with 6+ hours of sunshine. Its climate-comfort score is 5.1/10.
- Is May a good time to visit Selfoss?
- May earns a 5.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Selfoss in May?
- Expect about 144 mm of rain in May. Average humidity is 85% and there are about 15 days with 6+ hours of sunshine.
Curated in Selfoss
Tickets & experiences
Things to do in Selfoss
Selfoss, Iceland. Live activities and tours from GetYourGuide, matched to this destination.