Weather Comparison
Side-by-side weather comparison for May
| Metric | Riga | Helsinki | Better |
|---|---|---|---|
| Average HighHigher is warmer | 16°C (61°F)▲ | 13°C (55°F) | Riga |
| Average LowHigher is milder | 7°C (45°F)▲ | 6°C (43°F) | Riga |
| Rain DaysFewer is drier | 10 days | 9 days▲ | Helsinki |
| PrecipitationLess is drier | 52 mm | 44 mm▲ | Helsinki |
| Sunshine HoursMore is sunnier | 12h/day | 13h/day▲ | Helsinki |
| HumidityLower is more comfortable | 65% | 65% | Tie |
| UV IndexLower is safer | 10 | 10 | Tie |
| Wind SpeedCalmer is better | 20 km/h | 18 km/h▲ | Helsinki |
Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Helsinki edges ahead as the better destination in May. Helsinki offers 13 hours of daily sunshine with only 9 rain days, while Riga sees 12 sunshine hours and 10 rain days.
Riga sits in the comfortable travel range at 16°C. Helsinki is cooler at 13°C.
For travelers who prioritize dry weather, Helsinki is the stronger choice in May. Helsinki receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.
Riga reaches an average high of 16°C (61°F) and drops to 7°C (45°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 3°C difference is noticeable but not dramatic.
Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in May.
Riga receives approximately 52 mm of rainfall across 10 rain days during May. You can expect rain roughly every other day.
Helsinki sees 44 mm over 9 rain days. That makes Helsinki the drier option by 1 rain day and 8 mm of total precipitation.
Both cities share similar humidity levels at 65%.
Highs of 16°C, lows of 7°C, 10 rain days
Highs of 13°C, lows of 6°C, 9 rain days
Pack for both: warm layers, a mid-weight jacket, long trousers. These items are useful in either destination during May.
The table below shows average high temperatures and rain days for every month. May is highlighted for quick reference.
| Month | Riga | Helsinki | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | -1°C | 12d | -2°C | 11d |
| Feb | 0°C | 10d | -3°C | 9d |
| Mar | 4°C | 10d | 1°C | 9d |
| Apr | 11°C | 10d | 7°C | 9d |
| May | 16°C | 10d | 13°C | 9d |
| Jun | 20°C | 11d | 17°C | 12d |
| Jul | 22°C | 12d | 21°C | 12d |
| Aug | 22°C | 13d | 20°C | 12d |
| Sep | 17°C | 11d | 15°C | 10d |
| Oct | 10°C | 14d | 8°C | 12d |
| Nov | 4°C | 13d | 3°C | 12d |
| Dec | 1°C | 12d | 0°C | 12d |
Riga Weather in May
Full forecast, packing tips, and activities
Helsinki Weather in May
Full forecast, packing tips, and activities