Tallinn vs Helsinki

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Tallinn edges ahead as the better destination in May. Tallinn offers 13 hours of daily sunshine with only 9 rain days, while Helsinki sees 12 sunshine hours and 9 rain days.

Tallinn sits in the comfortable travel range at 15°C. Helsinki is cooler at 13°C.

For travelers who prioritize dry weather, both cities are equally dry in May. Tallinn receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.

Tallinn reaches an average high of 15°C (59°F) and drops to 6°C (43°F) at night during May. The daily temperature range is 9°C, meaning moderate variation throughout the day.

Helsinki averages 13°C (55°F) for the high and 6°C (43°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 May.

Tallinn receives approximately 42 mm of rainfall across 9 rain days during May. You can expect rain roughly every other day.

Helsinki sees 44 mm over 9 rain days. Both cities are equally rainy this month.

Both cities share similar humidity levels at 65%.