Finland Helsinki Weather in October (autumn) — Climate Guide
October (autumn) in Helsinki is Cool + dim
October (autumn) is Cool + dim for Helsinki.
October is autumn transition — cool, gray, days getting short rapidly (sunset 17:00 by end of month). Hotel rates at low-season lows. Indoor activities focus — saunas, museums, restaurants. Autumn foliage in Suomenlinna + parks.
Travel score
Helsinki October (autumn) Weather Stats
Avg High
8°C
Avg Low
4°C
Rainy Days
13
74mm total
Sunshine
3h
Daily avg
Humidity
85%
Cool + damp
UV Index
2
Low
Wind
16 km/h
Gusts 32
Sea Temp
9°C
Avg water temp
Crowds
Quiet
At attractions
October (autumn) Sunrise & Sunset
Air Quality
PM2.5
8 μg/m³
PM10
18 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
7°C
Nighttime
3°C
Humidity and wind affect how the actual temperature feels.
Wind
16 km/h
Max gust 32 km/h
Activities Recommended for October (autumn)
October (autumn) Travel Pros & Cons
Pros
- Lowest hotel rates of the year
- Sauna culture peak transition
- Cozy indoor café season
Cons
- Days shortening rapidly
- Cool + rainy
October (autumn) Events & Festivals
- Helsinki International Film Festival (Sep-Oct)
- Halloween (American import, mostly bars/clubs)
Helsinki in October (autumn) — Full Picture
October is autumn transition — cool, gray, days getting short rapidly (sunset 17:00 by end of month). Hotel rates at low-season lows. Indoor activities focus — saunas, museums, restaurants. Autumn foliage in Suomenlinna + parks.
What to Wear & What to Pack
Autumn — high 8°C, low 4°C. Trench coat + sweater + scarf. Daylight saving ends last Sunday (clocks back 1h).
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
7°C
-0.3°C
9/mo
Summer (Jun·Jul·Aug)
19.3°C
11.7°C
12.3/mo
Autumn (Sep·Oct·Nov)
Current8.3°C
3.7°C
13/mo
Winter (Dec·Jan·Feb)
-2.3°C
-8°C
10.7/mo
Helsinki Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| -3° | -9° | 11d·53mm | 1h | 85% | 0 | Quiet | Low season | |
| -3° | -10° | 9d·37mm | 3h | 84% | 0 | Quiet | Low season | |
| 1° | -6° | 9d·38mm | 4h | 80% | 2 | Quiet | Low season | |
| 7° | 0° | 9d·32mm | 6h | 70% | 4 | Quiet | Shoulder | |
| May (spring — best month) (Best) | 13° | 5° | 9d·39mm | 9h | 65% | 5 | Moderate | Shoulder |
| June (summer + white nights) (Best) | 18° | 10° | 11d·57mm | 10h | 65% | 6 | Busy | Peak |
| July (summer peak) (Best) | 21° | 13° | 13d·67mm | 9h | 70% | 6 | Very busy | Peak |
| 19° | 12° | 13d·79mm | 7h | 75% | 5 | Very busy | Peak | |
| 14° | 8° | 12d·67mm | 5h | 80% | 3 | Moderate | Shoulder | |
| 8° | 4° | 13d·74mm | 3h | 85% | 2 | Quiet | Low season | |
| 3° | -1° | 14d·73mm | 1h | 88% | 1 | Quiet | Low season | |
| -1° | -5° | 12d·56mm | 1h | 88% | 0 | Moderate | Shoulder |
View Other Months
Helsinki October (autumn) Hotel Picks
Frequently Asked Questions
Is October (autumn) a good time to visit Helsinki?
Helsinki in October (autumn) is Cool + dim. Tourist crowds are quiet and flight/hotel prices are low season.
What's the average temperature in Helsinki in October (autumn)?
Helsinki October (autumn) averages a high of 8°C and a low of 4°C.
Does it rain much in Helsinki in October (autumn)?
Helsinki October (autumn) averages 74mm of rainfall over about 13 rainy days.
What should I wear in Helsinki in October (autumn)?
Autumn — high 8°C, low 4°C. Trench coat + sweater + scarf. Daylight saving ends last Sunday (clocks back 1h).
What time are sunrise and sunset in Helsinki in October (autumn)?
Helsinki October (autumn) sunrise is 07:55 and sunset is 17:50, with 9h 55m of daylight.
What's the air quality like in Helsinki in October (autumn)?
Helsinki October (autumn) air quality (AQI) averages 30, rated Good. PM2.5 averages 8μg/m³.
What activities are recommended in Helsinki in October (autumn)?
In October (autumn), Helsinki is great for Saunas + Löyly, Museums + Galleries, Heritage cafés.
Is October (autumn) peak season in Helsinki?
Helsinki October (autumn) crowds are quiet and prices are low season. You can travel relatively comfortably without long queues.
Best Months to Visit Helsinki
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.