Weather atlas / The seasons
Climate in Helsinki
Helsinki experiences four distinct seasons with cold, snowy winters and milder, wetter summers. Temperatures range from around -15 degrees Celsius in winter to 20 degrees Celsius in July. Be prepared for significant snow accumulation during the winter months.
Temperature in °C · Rainfall in mm · Monthly climate averages
Temperature
Precipitation
Monthly Averages
Monthly detail · Scroll the table to see all measurements →
| Month | High °C | Avg °C | Low °C | Rain | Days | Sun (h) | Comfort |
|---|---|---|---|---|---|---|---|
| May | 12° | 11° | 9° | 0mm | 0 |
All-time Records
Record High13.5°CMay
Record Low9.2°CMay
Driest Month0mmMay
Sunniest MonthhMay