Finland Helsinki Weather in August (summer + Helsinki Festival) — Climate Guide
August (summer + Helsinki Festival) in Helsinki is Festive
August (summer + Helsinki Festival) is Festive for Helsinki.
**August continues summer peak.** **Helsinki Festival** (mid-August, 17 days) is Finland's premier arts festival with international + local performances. **Flow Festival** (3rd weekend) is the indie music + cultural festival at Suvilahti (€200+ tickets). Locals returning from summer cottages — city feels alive again.
Travel score
Helsinki August (summer + Helsinki Festival) Weather Stats
Avg High
19°C
Avg Low
12°C
Rainy Days
13
79mm total
Sunshine
7h
Daily avg
Humidity
75%
Slightly humid
UV Index
5
Moderate
Wind
14 km/h
Gusts 28
Sea Temp
18°C
Avg water temp
Crowds
Very busy
At attractions
August (summer + Helsinki Festival) Sunrise & Sunset
Air Quality
PM2.5
8 μg/m³
PM10
18 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
19°C
Nighttime
12°C
Humidity and wind affect how the actual temperature feels.
Wind
14 km/h
Max gust 28 km/h
Activities Recommended for August (summer + Helsinki Festival)
August (summer + Helsinki Festival) Travel Pros & Cons
Pros
- Helsinki Festival arts (premier event)
- Flow Festival music
- Warm Baltic swimming continues
Cons
- Hotel rates peak
- Crowds continue
August (summer + Helsinki Festival) Events & Festivals
- Helsinki Festival (mid-Aug, 17 days arts festival)
- Flow Festival (3rd weekend, music festival, Suvilahti)
- Locals return from summer cottages
Helsinki in August (summer + Helsinki Festival) — Full Picture
**August continues summer peak.** **Helsinki Festival** (mid-August, 17 days) is Finland's premier arts festival with international + local performances. **Flow Festival** (3rd weekend) is the indie music + cultural festival at Suvilahti (€200+ tickets). Locals returning from summer cottages — city feels alive again.
What to Wear & What to Pack
Late summer — high 19°C, low 12°C. Light layers + jacket evenings. Locals returning from cottages.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
7°C
-0.3°C
9/mo
Summer (Jun·Jul·Aug)
Current19.3°C
11.7°C
12.3/mo
Autumn (Sep·Oct·Nov)
8.3°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 August (summer + Helsinki Festival) Hotel Picks
Frequently Asked Questions
Is August (summer + Helsinki Festival) a good time to visit Helsinki?
Helsinki in August (summer + Helsinki Festival) is Festive. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Helsinki in August (summer + Helsinki Festival)?
Helsinki August (summer + Helsinki Festival) averages a high of 19°C and a low of 12°C.
Does it rain much in Helsinki in August (summer + Helsinki Festival)?
Helsinki August (summer + Helsinki Festival) averages 79mm of rainfall over about 13 rainy days.
What should I wear in Helsinki in August (summer + Helsinki Festival)?
Late summer — high 19°C, low 12°C. Light layers + jacket evenings. Locals returning from cottages.
What time are sunrise and sunset in Helsinki in August (summer + Helsinki Festival)?
Helsinki August (summer + Helsinki Festival) sunrise is 05:25 and sunset is 21:25, with 16h 00m of daylight.
What's the air quality like in Helsinki in August (summer + Helsinki Festival)?
Helsinki August (summer + Helsinki Festival) air quality (AQI) averages 30, rated Good. PM2.5 averages 8μg/m³.
What activities are recommended in Helsinki in August (summer + Helsinki Festival)?
In August (summer + Helsinki Festival), Helsinki is great for Helsinki Festival, Flow Festival, Saunas.
Is August (summer + Helsinki Festival) peak season in Helsinki?
Helsinki August (summer + Helsinki Festival) crowds are very busy and prices are peak. Advance reservations are strongly recommended.
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.