Verdict: Fair month
Reykjavík Weather in August
August is mild-to-cool in Reykjavík, topping out near 13°C (55°F) — comfortable with a layer on. It's also the wet side of the calendar: rain falls on about 16 days, so build flexibility into plans. August is workable in Reykjavík if your dates are fixed — just plan around the conditions.
Average high
13°C / 55°F
Average low
9°C / 48°F
Rain days
~16
Precipitation
128 mm
What to pack for Reykjavík in August
- Layers — t-shirts under a light jacket or sweater
- Rain gear is non-negotiable — expect rain on roughly 16 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
August against the rest of the year
Warmest in Reykjavík: Jul (13°C / 55°F) · Coolest: Dec (1°C / 34°F) · Wettest: May (~20 rain days)
2°
-3°
Jan
2°
-2°
Feb
3°
-2°
Mar
6°
1°
Apr
9°
4°
May
11°
7°
Jun
13°
9°
Jul
13°
9°
Aug
10°
6°
Sep
6°
2°
Oct
4°
0°
Nov
1°
-3°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)