Best Time to Visit Helsinki
Finland · Subarctic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
Recommended Months
Based on temperature comfort, low precipitation, and sunshine hours, the best time to visit Helsinki is:
July → June → August
July scores 57/100 — the highest-rated month for travel.
Monthly Ratings (0-100)
Scores are weighted: temperature comfort (50%), low precipitation (30%), sunshine (20%). Higher is better.
| Month | Overall Score | Temp Comfort | Precipitation | Sunshine | Bar |
|---|---|---|---|---|---|
| January | 0 | 0 | 0 | 0 | |
| February | 0 | 0 | 0 | 0 | |
| March | 0 | 0 | 0 | 0 | |
| April | 2 | 3 | 0 | 0 | |
| May | 17 | 34 | 0 | 0 | |
| June | 34 | 68 | 0 | 0 | |
| July | 37 | 74 | 0 | 0 | |
| August | 36 | 71 | 0 | 0 | |
| September | 25 | 50 | 0 | 0 | |
| October | 12 | 25 | 0 | 0 | |
| November | 0 | 0 | 0 | 0 | |
| December | 0 | 0 | 0 | 0 |
Monthly Temperature Comfort
| Month | Mean Temp | Comfort Level |
|---|---|---|
| January | -2.6°C (27.3°F) | Cold (Below 0°C) |
| February | -2.6°C (27.3°F) | Cold (Below 0°C) |
| March | -0.4°C (31.3°F) | Cold (Below 0°C) |
| April | 3.6°C (38.5°F) | Cool (0-9°C) |
| May | 9.7°C (49.5°F) | Cool (0-9°C) |
| June | 16.7°C (62.1°F) | Mild (10-17°C) |
| July | 17.9°C (64.2°F) | Mild (10-17°C) |
| August | 17.2°C (63.0°F) | Mild (10-17°C) |
| September | 12.9°C (55.2°F) | Mild (10-17°C) |
| October | 8.0°C (46.4°F) | Cool (0-9°C) |
| November | 3.0°C (37.4°F) | Cool (0-9°C) |
| December | -1.8°C (28.8°F) | Cold (Below 0°C) |
Monthly Precipitation Rating
| Month | Rainfall (mm) | Rainy Days | Rating |
|---|---|---|---|
| January | 76.4 mm | 9.4 | Wet |
| February | 71.2 mm | 10.6 | Wet |
| March | 49.2 mm | 10.6 | Moderate |
| April | 46.1 mm | 13.2 | Moderate |
| May | 51.0 mm | 13.6 | Moderate |
| June | 49.8 mm | 12.0 | Moderate |
| July | 79.9 mm | 20.4 | Wet |
| August | 97.1 mm | 19.6 | Wet |
| September | 69.6 mm | 15.6 | Wet |
| October | 86.2 mm | 20.0 | Wet |
| November | 78.3 mm | 15.8 | Wet |
| December | 70.0 mm | 12.2 | Wet |
Monthly Sunshine Rating
| Month | Sunshine (hrs/day) | Rating |
|---|---|---|
| January | 1.5 hrs | Low |
| February | 3.4 hrs | Low |
| March | 6.8 hrs | Good |
| April | 10.0 hrs | Excellent |
| May | 12.9 hrs | Excellent |
| June | 15.6 hrs | Excellent |
| July | 13.8 hrs | Excellent |
| August | 11.1 hrs | Excellent |
| September | 8.6 hrs | Excellent |
| October | 5.1 hrs | Moderate |
| November | 2.0 hrs | Low |
| December | 1.1 hrs | Low |
Season-by-Season Breakdown
Spring (Mar-May)
Temperature: 4.3°C (39.7°F)
Rainfall: 48.8mm avg
Sunshine: 9.9 hrs/day
Humidity: 75.5%
Rainy Days: 12.5/mo
This is the cool season. Pack warm layers and plan indoor activities.
Summer (Jun-Aug)
Temperature: 17.3°C (63.1°F)
Rainfall: 75.6mm avg
Sunshine: 13.5 hrs/day
Humidity: 74.8%
Rainy Days: 17.3/mo
Mild transitional weather — comfortable for most activities.
Autumn (Sep-Nov)
Temperature: 8.0°C (46.4°F)
Rainfall: 78.0mm avg
Sunshine: 5.2 hrs/day
Humidity: 83.6%
Rainy Days: 17.1/mo
This is the cool season. Pack warm layers and plan indoor activities.
Winter (Dec-Feb)
Temperature: -2.3°C (27.9°F)
Rainfall: 72.5mm avg
Sunshine: 2.0 hrs/day
Humidity: 86.2%
Rainy Days: 10.7/mo
This is the cool season. Pack warm layers and plan indoor activities.
Frequently Asked Questions
What is the best time to visit Helsinki?
Based on our data-driven analysis, the best months to visit Helsinki are July, June, August, when temperatures are comfortable, rainfall is lower, and sunshine is plentiful. July scores 57/100, the highest-rated month.
What is the hottest month in Helsinki?
July is the hottest month with an average temperature of 17.9°C (64.2°F).
What is the coldest month in Helsinki?
January is the coldest month with an average temperature of -2.6°C (27.3°F).
When is the rainy season in Helsinki?
August is the wettest month with an average of 97.1mm of precipitation. Helsinki experiences about 173.0 rainy days per year. The driest month is April with 46.1mm.
What should I pack for a trip to Helsinki?
Packing recommendations depend on the season of your visit. Based on the climate data, pack lightweight, breathable clothing if visiting during the warm months (July is hottest at 17.9°C). For cooler months, bring layers and a warm jacket (January averages -2.6°C). A waterproof jacket or umbrella is recommended year-round as Helsinki receives 825.0mm of annual precipitation. Sun protection is important, especially during months with high UV index.
If you're planning outdoor activities in Helsinki, daylight is the variable that matters most. I did a sea kayak tour in June at 10pm — full sun, 18°C, surreal. December gives you 6 hours of gray light, which limits everything. The Nordic summer (June-August) is the outdoor window: 18-22°C, 19 hours of daylight, perfect for island-hopping by ferry. Winter is its own adventure: -5°C, snow cover from January-March, and the sauna-ice-swim cycle is a Helsinki essential. Pack windproof layers year-round — the Baltic breeze cuts hard. September brings fall colors and fewer tourists; my favorite hiking month.
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 60.17°, 24.94°. Timezone: Europe/Helsinki. Last updated: 2026-07-30.