May 18 is statistically one of the best days of the year in Phoenix. With minimal rain risk (0%) and pleasant highs of 35°C, it's ideal for outdoor adventures. Phoenix is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Phoenix
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Safety
Moderate Safety
GPI: 2.44
Phoenix Weather Forecast for May 18
"Warm & Sunny. Expect average highs of 35°C. 0% chance of rain."
What to Wear in Phoenix in May
Based on historical data for May 18, Phoenix typically experiences temperatures between 20.3°C and 35°C. We recommend packing t-shirt, light clothing, layers (onion system) to stay comfortable. Trends suggest it will stay mostly dry (0% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Phoenix
Smart Suitcase
- T-Shirt
- Light Clothing
- Layers (Onion System)
Average High
35°C
Daytime Peak
Average Low
20.3°C
Nighttime Low
Feels Like
35°C
🔥 Feels accurate
Rain Chance
0%
Avg 0mm if it rains
Cloud Cover
24%
Overcast
Pressure
1008.5 hPa
Low volatility
Phoenix Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 92% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 50+, limit exposure 10am-4pm
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 10 min to burn
Type III-IV
🟡 15 min to burn
Type V-VI
🟢 25 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
7.9°C
Dry air
Heat Stress
Low
No heat warning
😕 Best outdoor time:
Early morning (6-9 AM) or evening (after 6 PM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
High
100/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~821
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Phoenix
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:27
☀️ Noon
12:26
🌇 Sunset
19:24
⏱️ Daylight
13h 57m
Wind Speed
18.1 km/h
Gentle breeze
Sunshine
12.6 hrs
Direct Sun (Cloud-free)
Humidity
19%
Dry air
Travel Intelligence
Exclusive flight analytics & health data for Phoenix
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Phoenix
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
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.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Phoenix on May 18 averages 35°C with a 0% precipitation probability. Wedding/Outdoor Event Score: 91/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Phoenix Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
May 11
33.8°C • 1% rain
Score
97
May 12
34.1°C • 0% rain
Score
96
May 13
34.6°C • 1% rain
Score
94
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 18) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Phoenix Worth Visiting on May 18?
Planning a trip to Phoenix on May 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 35°C with a 0% historical precipitation risk.
✈️ Travel Logistics: Approximately 821 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest May 18 recorded in the last 30 years saw temperatures hit 38.2°C in 2024, while the coldest dropped to 16.1°C in 2019.