Reykjavík Weather in September

With daytime temperatures of 12°C (54°F) and nighttime lows of 6°C (43°F), September in Reykjavík brings moderate temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 145 mm (5.7 in) falls on average.

Rainfall in Reykjavík in September

The climate data from previous years indicates about 18 days of rain, averaging 145 mm (5.7 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Reykjavík in September

If you're visiting Reykjavík in September, expect highs of 12°C (54°F) and overnight lows around 6°C (43°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to 6°C (43°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Reykjavík in September

The area experiences a moderate amount of sunshine, with approximately 121 hours of sunlight expected. This means a decent mix of sun and overcast.

Wind Speed in Reykjavík in September

September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in September

At 10°C (50°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June and July typically offer the best weather for Reykjavík.