What is the weather like in Turku in September?

Expect temperatures between 9°C and 16°C with 24% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Turku in September?

Turku in September scores 63/100 based on 30 years of climate data. Good option with minor considerations.

Who should visit Turku in September?

September in Turku is ideal for: Outdoor enthusiasts, Cultural tourists, Honeymoon couples, Business travelers.

Turku Weather in September | 30-Year Forecast

Avg High

16°C

Hottest around day 6

Avg Low

9°C

Coolest around day 30

Rainy Days

13days

24% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Coastal Waters(Ocean)

17.2°C

Monthly Average

Water Feel

💧Refreshing

Consider a wetsuit for extended swimming

Swim Rating

🏄Cool, wetsuits recommended

Based on average sea surface temperature

Body of Water

Coastal Waters

Ocean

Turku coastline

Essential Travel Info for Turku

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

EUR

€ Euro

Language

Finnish

+1 more

Driving

Right side

Connect

Students and personnel from participatin...

Safety

Very High Safety

GPI: 1.439

Travel Intelligence

Exclusive flight analytics & health data for Turku

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Remote

8/ 100

Traffic Index

Off the beaten path

Peak Daily Arrivals

slots per day

Peak

Dec

Low

Mar

Monthly Traffic Distribution

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Traffic Level

Low Season

Key Connections

Stockholm -Arlanda (ARN)

Gdańsk Lech Wałęsa (GDN)

Copenhagen Kastrup (CPH)

Riga (RIX)

Vilnius (VNO)

Health & Safety Advisory

CDC travel health recommendations

8 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis A

Consider hepatitis A vaccination for most travelers. It is recommended for travelers who will be doing higher risk activities, such as visiting smaller cities, villages, or rural areas where a traveler might get infected through food or water. It is recommended for travelers who plan on eating street food.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Finland. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Finland.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Polio

In Finland poliovirus has been identified in the past year.Travelers to Finland are at increased risk of exposure to poliovirus.Vaccine recommendations: Adults traveling to Finland who received a complete polio vaccination series as children may receive a single lifetime booster dose of inactivated polio vaccine; travelers who are unvaccinated or not fully vaccinated should receive a complete polio vaccination series before travel. Children who are not fully vaccinated will be considered for anaccelerated vaccination schedule.

Rabies

Dogs infected with rabies are not commonly found in Finland.If rabies exposures occur while in Finland, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

+2 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Turku?

👌Good option with minor considerations(63/100)

Short Answer

Turku's September delivers on its reputation: 16°C, 24% rain, 8.3h sunshine. The trade-off? Peak crowds and prices at 89% capacity.

Decision Factors

Vaccinations required

Yellow Fever

Very high humidity

82% average humidity

Peak tourist season

89% of annual peak - expect crowds and high prices

Health precautions needed

Be aware of: Leptospirosis, Hantavirus, Parvovirus B19

Plenty of sunshine

8.3h of sunshine daily

Calm, family-friendly seas

0.21m wave height - Lake-like

Good For

🥾
Outdoor enthusiasts
Ideal hiking conditions: 15.7°C, 24% rain chance
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💑
Honeymoon couples
Wedding score 89/100 with romantic weather conditions
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

🏖️
Beach lovers
Sea temperature only 17.2°C - too cold for comfortable swimming
💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
82% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Turku in September averages 16°C with 24% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Turku in September

What are the temperatures in Turku in September?

Daytime highs average 16°C, nights drop to 9°C. Temperatures remain fairly consistent.

How many rainy days in Turku in September?

Expect around 13 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Turku in September?

Layers are key. A medium-weight jacket and closed-toe shoes.

Is September peak season in Turku?

This is shoulder season—moderate prices and manageable crowds.

Turku Weather in September