April 18 is generally a great time to visit Portland. While there is a slight chance of rain (36%), showers are usually brief. Expect comfortable 15°C weather. Portland is seeing high visitor numbers, so iconic spots may be busier than usual. Note: April 18 is Good Friday in Portland, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Portland
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Safety
Moderate Safety
GPI: 2.44
Portland Weather Forecast for April 18
"Mild & Comfortable. Expect average highs of 15.2°C. 36% chance of rain."
What to Wear in Portland in April
Based on historical data for April 18, Portland typically experiences temperatures between 5.1°C and 15.2°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 36% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Portland
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
15.2°C
Daytime Peak
Average Low
5.1°C
Nighttime Low
Feels Like
15.2°C
🌤️ Feels accurate
Rain Chance
36%
Avg 2.4mm if it rains
Cloud Cover
66%
Overcast
Pressure
1018.8 hPa
Medium volatility
Portland Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
~ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 19:00
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
10.6°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Holiday
Good Friday
Flight Traffic
Busy
79/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~256
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Portland
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:20
☀️ Noon
12:11
🌇 Sunset
19:01
⏱️ Daylight
13h 40m
Wind Speed
12.2 km/h
Gentle breeze
Sunshine
9.3 hrs
Direct Sun (Cloud-free)
Humidity
74%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Portland
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
Travel Health & Safety in Portland
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
Volcanic Activity
Nearest: Mount St. Helens
84km away
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Portland on April 18 averages 15.2°C with a 36% precipitation probability. Wedding/Outdoor Event Score: 74/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Portland Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
April 16
15°C • 36% rain
Score
82
April 22
15.9°C • 31% rain
Score
80
April 23
16.1°C • 31% rain
Score
80
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (April 18) in other destinations
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Prague
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London
United Kingdom
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🌍 Explore the same date in different destinations around the world
📍 Is Portland Worth Visiting on April 18?
Planning a trip to Portland on April 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 15.2°C with a 36% historical precipitation risk.
🎉 Local Event: The date coincides with Good Friday, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 256 landing slots available daily during this period, indicating manageable crowd levels.
📊 Historical Extremes: The hottest April 18 recorded in the last 30 years saw temperatures hit 28.8°C in 2016, while the coldest dropped to 1.7°C in 2023.