May 18 is generally a great time to visit Oslo. While there is a slight chance of rain (23%), showers are usually brief. Expect comfortable 17°C weather. Oslo is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Oslo
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
Oslo Weather Forecast for May 18
"Mild & Comfortable. Expect average highs of 16.5°C. 23% chance of rain."
What to Wear in Oslo in May
Based on historical data for May 18, Oslo typically experiences temperatures between 7.6°C and 16.5°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (23% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Oslo
Smart Suitcase
- Light Jacket
- Long Pants
Average High
16.5°C
Daytime Peak
Average Low
7.6°C
Nighttime Low
Feels Like
16.5°C
🌤️ Feels accurate
Rain Chance
23%
Avg 1.8mm if it rains
Cloud Cover
60%
Overcast
Pressure
1013.9 hPa
Medium volatility
Oslo Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 90% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
03:00 - 10:00
16:00 - 20:00
Type I-II
🔴 24 min to burn
Type III-IV
🟡 36 min to burn
Type V-VI
🟢 60 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
10.1°C
Pleasant
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Norway
Flight Traffic
High
95/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~348
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Oslo
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
03:34
☀️ Noon
12:14
🌇 Sunset
20:54
⏱️ Daylight
17h 19m
Wind Speed
14.4 km/h
Gentle breeze
Sunshine
11.8 hrs
Direct Sun (Cloud-free)
Humidity
66%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Oslo
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Oslo
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Oslo on May 18 averages 16.5°C with a 23% precipitation probability. Wedding/Outdoor Event Score: 87/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Oslo Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (May 18) in other destinations
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📍 Is Oslo Worth Visiting on May 18?
Planning a trip to Oslo on May 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 16.5°C with a 23% historical precipitation risk.
✈️ Travel Logistics: Approximately 348 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Norway, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 13.5°C (polar plunge). Wave conditions are generally lake-like with heights around 0.17m.
📊 Historical Extremes: The hottest May 18 recorded in the last 30 years saw temperatures hit 23°C in 2024, while the coldest dropped to 3°C in 2023.