Helsinki Temperature Market Guide

EFHK • Helsinki-Vantaa Airport

Polymarket

Helsinki, Finland's capital, offers a humid continental climate at the edge of the subarctic zone. Located on the Baltic Sea coast, the city experiences cold, snowy winters and mild summers with dramatic seasonal daylight variation.

Quick Facts

Station Code	`EFHK`
Location	Helsinki, Finland
Coordinates	60.3172°N, 24.9633°E
Elevation	167 ft (51 m)
Timezone	EET (Europe/Helsinki)
NWS Office	Finnish Meteorological Institute

About EFHK Weather Station

Helsinki-Vantaa Airport (EFHK) serves as the primary weather observation station for the Helsinki metropolitan area. Located about 20 kilometers north of central Helsinki, the airport sits at 167 feet (51 meters) elevation.

Helsinki's position on the Baltic Sea provides some maritime moderation, though winters remain cold. The Finnish Meteorological Institute maintains official observations.

Climate Patterns

Helsinki has a humid continental climate (Koppen: Dfb) with cold winters and mild summers. The Baltic Sea moderates temperatures somewhat compared to inland Finland.

Summer highs reach 20-23�C (68-73�F) with long daylight hours. Winters are cold with highs around -2 to -4�C (25-28�F), though temperatures can drop well below -20�C during Arctic outbreaks.

Snow typically covers the ground from December through March.

📊 View Real-Time Helsinki Data

Access live temperature readings, forecasts from 15+ models, and historical analysis tools.

Open Live Dashboard

Seasonal Trading Considerations

Winter (December - February): Cold with highs -4 to -2�C (25-28�F). Arctic outbreaks bring temperatures below -20�C. Very short daylight hours.

Spring (March - May): Gradual warming as snow melts. Highly variable conditions. Rapidly increasing daylight.

Summer (June - August): Mild with highs 20-23�C (68-73�F). Near-continuous daylight in June. Occasional heat waves bring 30�C+.

Autumn (September - November): Cooling rapidly. First snow often in November. Rapidly decreasing daylight.

Trading Tips for Helsinki

Helsinki's position at 60�N latitude creates extreme seasonal daylight variation - from near 24-hour daylight in summer to just 6 hours in winter.

The Baltic Sea provides some winter moderation compared to inland Finland, but remains cold enough to freeze over some years.

Arctic air masses from Russia can bring extreme cold in winter.

Summer heat waves occur when subtropical air reaches this far north, but are relatively rare.

Data Release Schedule

Typical release times for key data products at EFHK. Times shown in UTC.

Data Type	Typical Time (UTC)	Variability
METAR Hourly observations	Hourly at :53	±1 min

6-Hour High/Low Reports

These METARs include 6-hour maximum and minimum temperatures, useful for tracking intraday temperature trends.

00:53 UTC

06:53 UTC

12:53 UTC

18:53 UTC

Note: Times are approximate and may vary. CLI reports are the official resolution source for temperature markets. See NWS Data Guide for more information.

Forecasting Challenges

Arctic Outbreak Intensity: Severe cold waves can exceed forecasts when Arctic air is stronger than expected.

Baltic Sea Effects: Ice cover affects the sea's moderating influence.

Summer Heat: Occasional heat waves can bring surprisingly high temperatures for this latitude.