TripPick Finland Finland

Helsinki Weather in August (summer + Helsinki Festival) — Climate Guide

August (summer + Helsinki Festival) in Helsinki is Festive

Avg High
19°C
Avg Low
12°C
Rainy Days
13
Sunshine
7h

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.

Crowds: Very busy Prices: Peak Sea temp: 18°C
9 /10

Travel score

Helsinki August (summer + Helsinki Festival) Weather Stats

Avg High

19°C

-10°
40°
Temperature range

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

Sunrise
05:25
Day length
16h 00m
Sunset
21:25
00:0006:0012:0018:0024:00

Air Quality

30
AQI
Good
GoodModeratePoorVery poor

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)

Helsinki Festival Flow Festival Saunas All outdoor

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

Light layers
Walking shoes
Light jacket evenings
Sunglasses

Seasonal Weather Overview

Spring (Mar·Apr·May)

Avg High

7°C

Avg Low

-0.3°C

Rainy days

9/mo

Quiet Shoulder

Summer (Jun·Jul·Aug)

Current
Avg High

19.3°C

Avg Low

11.7°C

Rainy days

12.3/mo

Very busy Peak

Autumn (Sep·Oct·Nov)

Avg High

8.3°C

Avg Low

3.7°C

Rainy days

13/mo

Quiet Low season

Winter (Dec·Jan·Feb)

Avg High

-2.3°C

Avg Low

-8°C

Rainy days

10.7/mo

Quiet Low season

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
-6° 9d·38mm 4h 80% 2 Quiet Low season
9d·32mm 6h 70% 4 Quiet Shoulder
13° 9d·39mm 9h 65% 5 Moderate Shoulder
18° 10° 11d·57mm 10h 65% 6 Busy Peak
21° 13° 13d·67mm 9h 70% 6 Very busy Peak
19° 12° 13d·79mm 7h 75% 5 Very busy Peak
14° 12d·67mm 5h 80% 3 Moderate Shoulder
13d·74mm 3h 85% 2 Quiet Low season
-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

Jimmy Kong TripPick founder · Travel content creator

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.

8+ years analyzing travel data 30+ countries visited Live exchange rate verified
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