Riga vs Helsinki

Riga and Helsinki are closely matched in September. Neither city has a clear advantage across all metrics. Your decision should come down to personal preference, cultural interests, and travel logistics rather than weather alone.

Riga sits in the comfortable travel range at 17°C. Helsinki is also comfortable at 15°C.

For travelers who prioritize dry weather, Helsinki is the stronger choice in September. Riga receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.

Riga reaches an average high of 17°C (63°F) and drops to 10°C (50°F) at night during September. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Helsinki averages 15°C (59°F) for the high and 10°C (50°F) for the low, with a daily range of 5°C. The 2°C difference is noticeable but not dramatic.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in September.

Riga receives approximately 68 mm of rainfall across 11 rain days during September. You can expect rain roughly every other day.

Helsinki sees 58 mm over 10 rain days. That makes Helsinki the drier option by 1 rain day and 10 mm of total precipitation.

Both cities share similar humidity levels at 65%.