Average temperatures, rainfall and packing tips for Helsinki, Finland in May
May in Helsinki is typically mild, with average daytime highs around 16°C and nights near 8°C. Temperature-wise it sits mid-range for Helsinki (the 5th warmest month).
May is essentially dry in Helsinki - rainfall is negligible on average and it is typically the driest month of the year.
If your dates are flexible, the most comfortable months in Helsinki are usually June, July, August and September.
← Helsinki weather tomorrow (live)
In May, Helsinki averages a daytime high of about 16°C and a night-time low of around 8°C, based on recent historical data.
May is essentially dry in Helsinki - rainfall is negligible on average and it is typically the driest month of the year.
May is a workable time to visit Helsinki, with mild days - just pack accordingly. If your dates are flexible, the most comfortable months in Helsinki are usually June, July, August and September.