Helsinki vs Riga

Helsinki and Riga 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.

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

Helsinki reaches an average high of 15°C (59°F) and drops to 10°C (50°F) at night during September. The daily temperature range is 5°C, meaning relatively stable temperatures from day to night.

Riga averages 17°C (63°F) for the high and 10°C (50°F) for the low, with a daily range of 7°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.

Helsinki receives approximately 58 mm of rainfall across 10 rain days during September. You can expect rain roughly every other day.

Riga sees 68 mm over 11 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%.