What is the weather like in Basel in September?

Expect temperatures between 11°C and 21°C with 30% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Basel in September?

Basel in September scores 65/100 based on 30 years of climate data. Solid choice for most travelers.

Who should visit Basel in September?

September in Basel is ideal for: Cultural tourists, Business travelers.

Basel Weather in September | 30-Year Forecast

Avg High

21°C

Hottest around day 5

Avg Low

11°C

Coolest around day 28

Rainy Days

27days

30% avg rain chance

Sunshine

8hrs/day

Autumn season

Essential Travel Info for Basel

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

CHF

Fr. Swiss franc

Language

French

+3 more

Driving

Right side

Connect

As of Sept 2021, Basel has 4G from Salt,...

Safety

Very High Safety

GPI: 1.357

Travel Intelligence

Exclusive flight analytics & health data for Basel

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate

48/ 100

Traffic Index

Balanced traffic

Peak Daily Arrivals

slots per day

Peak

Aug

Low

May

Monthly Traffic Distribution

Jan

Feb

Mar

Apr

May

163

Jun

152

Jul

181

Aug

173

Sep

103

Oct

Nov

106

Dec

Traffic Level

Low Season

Key Connections

Prishtina Priština (PRN)

Frankfurt-am-Main (FRA)

London Heathrow (LHR)

Amsterdam Schiphol (AMS)

Budapest Ferenc Liszt (BUD)

Health & Safety Advisory

CDC travel health recommendations

7 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 Switzerland. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Switzerland.

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.

Rabies

Dogs infected with rabies are not commonly found in Switzerland.If rabies exposures occur while in Switzerland, rabies vaccines are typically not readily available.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.

Tick-borne Encephalitis

For travelers moving or traveling toTBE-endemic areasTBE vaccineis recommended for persons who will haveextensiveexposure to ticks based on their planned outdoor activities and itinerary.TBE vaccine may be considered for persons who might engage in outdoor activities in areas ticks are likely to be found.

+1 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Basel?

👍Solid choice for most travelers(65/100)

Short Answer

Basel's September delivers on its reputation: 21°C, 30% rain, 8.6h sunshine. The trade-off? Peak crowds and prices at 96% capacity.

Decision Factors

Vaccinations required

Yellow Fever

Peak tourist season

96% of annual peak - expect crowds and peak prices

Ideal temperature range

20.7°C - perfect for sightseeing and outdoor activities

Health precautions needed

Be aware of: Leptospirosis, Hantavirus, Tuberculosis (TB)

Plenty of sunshine

8.6h of sunshine daily

Rich cultural heritage

5 UNESCO World Heritage sites nearby

Good For

🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
77% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Basel in September averages 21°C with 30% precipitation probability."

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

Frequently Asked Questions: Basel in September

What are the temperatures in Basel in September?

Daytime highs average 21°C, nights drop to 11°C. Temperatures remain fairly consistent.

How many rainy days in Basel in September?

Expect around 27 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Basel in September?

Comfortable casual wear with a light jacket for evenings.

Is September peak season in Basel?

This is shoulder season—moderate prices and manageable crowds.

Basel Weather in September

Basel September Weather Calendar