Best time to visit Helsinki: month-by-month weather (2026)
The highest-scoring months in Helsinki are Jun and Jul.
Best months
Jun and Jul
Peak season
Jun, Jul and Aug
Off season
Oct, Nov and Dec
Monthly Temperatures (°C)
Monthly Rainfall (mm)
Month-by-Month Guide
Temperature, rainfall and sunshine are measured. The visit score below is derived from those three (design spec §5.3)estimate.
Jan
Temp: -5.8°C – -0.9°C
Rain: 78mm
Sunshine: 1.5h/day
Visit score: 2.5/10
Feb
Temp: -5.3°C – -0.7°C
Rain: 51mm
Sunshine: 2.8h/day
Visit score: 2.8/10
Mar
Temp: -3°C – 2.6°C
Rain: 51mm
Sunshine: 6h/day
Visit score: 3.5/10
Apr
Temp: 0.8°C – 7.6°C
Rain: 59mm
Sunshine: 9.2h/day
Visit score: 4.1/10
May
Temp: 6°C – 14.2°C
Rain: 29mm
Sunshine: 13.5h/day
Visit score: 6.5/10
Jun
BestTemp: 11.4°C – 18.8°C
Rain: 56mm
Sunshine: 14.4h/day
Visit score: 7.6/10
Jul
BestTemp: 14.8°C – 21.2°C
Rain: 86mm
Sunshine: 13.5h/day
Visit score: 8.2/10
Aug
Temp: 13.8°C – 19.8°C
Rain: 94mm
Sunshine: 11.5h/day
Visit score: 6.7/10
Sep
Temp: 12.3°C – 17.4°C
Rain: 92mm
Sunshine: 9.1h/day
Visit score: 6.7/10
Oct
Temp: 5.1°C – 9.5°C
Rain: 85mm
Sunshine: 5.1h/day
Visit score: 2.4/10
Nov
Temp: 0.9°C – 4.7°C
Rain: 82mm
Sunshine: 1.9h/day
Visit score: 1.7/10
Dec
Temp: -2.5°C – 1.4°C
Rain: 70mm
Sunshine: 1.1h/day
Visit score: 2.4/10
When to go, and when not to
June and July stand out as the best months to visit Helsinki, carrying the highest visit scores of the year. July brings average highs of 21.2C and lows of 14.8C with 13.5 hours of sunshine per day, while June offers highs of 18.8C, lows of 11.4C, and 14.4 hours of sunshine, making both months bright and mild.
These benefits come with trade-offs: July is also fairly wet at 86mm of rain, and August, still part of the peak season, sees even more at 94mm, so summer visitors should expect occasional showers. Peak season from June through August brings the busiest travel conditions, while the off season of October, November, and December offers lower costs and quieter travel in exchange for colder temperatures and far less daylight.
Season Guide
Spring
March – May
Mild temperatures and blooming gardens. A great time for sightseeing with fewer crowds than summer.
Packing tips
- · Light layers
- · Rain jacket
- · Comfortable walking shoes
Summer
June – August
Warmest months with the longest days. Peak tourist season in most destinations.
Packing tips
- · Sunscreen
- · Hat
- · Light clothing
- · Refillable water bottle
Autumn
September – November
Cooling temperatures and autumn foliage. Shoulder season with good deals on accommodations.
Packing tips
- · Medium layers
- · Sweater
- · Waterproof jacket
Winter
December – February
Coldest months with shorter days. Holiday markets and winter activities in many cities.
Packing tips
- · Warm coat
- · Scarf and gloves
- · Thermal layers
- · Waterproof boots
Keep reading
Sources
- GeoNames city database — CC BY 4.0, fetched September 14, 2026
- Open-Meteo climate archive — CC BY 4.0, fetched September 21, 2026
AI-written interpretation reviewed against the data above — claude-sonnet-5, generated September 21, 2026. Every number on this page comes from a dataset named here; the formulas are public.