Verdict: Excellent month
Oslo Weather in August
August hits the sweet spot in Oslo — highs around 20°C (68°F), ideal for a full day on foot. Expect showers on roughly 12 days of the month — rarely trip-ruining, worth planning around. Overall, August is one of the best months of the year to be in Oslo.
Average high
20°C / 68°F
Average low
13°C / 55°F
Rain days
~12
Precipitation
91 mm
What to pack for Oslo in August
- Layers — t-shirts under a light jacket or sweater
- Rain gear is non-negotiable — expect rain on roughly 12 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
August against the rest of the year
Warmest in Oslo: Jun (21°C / 70°F) · Coolest: Jan (0°C / 32°F) · Wettest: Jul (~14 rain days)
0°
-5°
Jan
2°
-4°
Feb
5°
-2°
Mar
10°
1°
Apr
16°
6°
May
21°
12°
Jun
20°
13°
Jul
20°
13°
Aug
16°
9°
Sep
10°
5°
Oct
4°
1°
Nov
0°
-5°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)