What is the weather like in Oslo in September?

Expect temperatures between 10°C and 16°C with 27% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Oslo in September?

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

Who should visit Oslo in September?

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

Oslo Weather in September | 30-Year Forecast

Avg High

16°C

Hottest around day 5

Avg Low

10°C

Coolest around day 30

Rainy Days

18days

27% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Skagerrak

16.3°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

Skagerrak

Oslo coastline

Essential Travel Info for Oslo

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

NOK

kr Norwegian krone

Language

Norwegian Nynorsk

+2 more

Driving

Right side

Connect

Most of Oslo is covered by 5G. Most of t...

Safety

Very High Safety

GPI: 1.465

Travel Intelligence

Exclusive flight analytics & health data for Oslo

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Well Connected

64/ 100

Traffic Index

Popular destination

Peak Daily Arrivals

slots per day

Peak

Apr

Low

Nov

Monthly Traffic Distribution

275

Jan

291

Feb

288

Mar

365

Apr

348

May

338

Jun

317

Jul

330

Aug

230

Sep

334

Oct

173

Nov

282

Dec

Traffic Level

Low Season

Key Connections

Trondheim Værnes (TRD)

Bergen Flesland (BGO)

Copenhagen Kastrup (CPH)

Stavanger Sola (SVG)

Stockholm -Arlanda (ARN)

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

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 Norway.If rabies exposures occur while in Norway, 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.

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 Oslo?

👌Good option with minor considerations(63/100)

Short Answer

Perfect travel weather awaits in Oslo during September - 16°C highs, 81% humidity, and 27% rain probability make this an optimal time for outdoor activities.

Decision Factors

Vaccinations required

Yellow Fever

Very high humidity

81% average humidity

Health precautions needed

Be aware of: Leptospirosis, Hantavirus, Parvovirus B19

Calm, family-friendly seas

0.25m wave height - Lake-like

Shoulder season - balanced conditions

63% of peak - good value with moderate crowds

Exceptional dining scene

30 Michelin-listed restaurants

Good For

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

Who Should Avoid

🏖️
Beach lovers
Sea temperature only 16.3°C - too cold for comfortable swimming
👴
Elderly travelers
81% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Oslo in September averages 16°C with 27% precipitation probability."

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

Frequently Asked Questions: Oslo in September

What are the temperatures in Oslo in September?

Daytime highs average 16°C, nights drop to 10°C. Temperatures remain fairly consistent.

How many rainy days in Oslo in September?

Expect around 18 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Oslo in September?

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

Is September peak season in Oslo?

This is shoulder season—moderate prices and manageable crowds.

Oslo Weather in September