December 31 is statistically one of the best days of the year in Phoenix. With minimal rain risk (9%) and pleasant highs of 17°C, it's ideal for outdoor adventures. As it's peak season for Phoenix, we recommend booking your stay well in advance to secure the best rates.
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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 December 31
"Mild & Comfortable. Expect average highs of 17.4°C. 9% chance of rain."
What to Wear in Phoenix in December
Based on historical data for December 31, Phoenix typically experiences temperatures between 4.3°C and 17.4°C. We recommend packing light jacket, long pants, layers (onion system) to stay comfortable. Trends suggest it will stay mostly dry (9% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Phoenix
Smart Suitcase
- Light Jacket
- Long Pants
- Layers (Onion System)
Average High
17.4°C
Daytime Peak
Average Low
4.3°C
Nighttime Low
Feels Like
17.4°C
🌤️ Feels accurate
Rain Chance
9%
Avg 0.2mm if it rains
Cloud Cover
41%
Overcast
Pressure
1017.5 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 93% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
8.3°C
Dry air
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
High
84/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~687
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Phoenix
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:33
☀️ Noon
12:32
🌇 Sunset
17:31
⏱️ Daylight
9h 58m
Wind Speed
10.7 km/h
Light breeze
Sunshine
8.1 hrs
Direct Sun (Cloud-free)
Humidity
55%
Comfortable
Travel Intelligence
Exclusive flight analytics & health data for Phoenix
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
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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 December 31 averages 17.4°C with a 9% 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
January 6
18.3°C • 8% rain
Score
94
January 7
18.4°C • 7% rain
Score
94
December 24
17.6°C • 12% rain
Score
93
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 31) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Phoenix Worth Visiting on December 31?
Planning a trip to Phoenix on December 31? 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 17.4°C with a 9% historical precipitation risk.
✈️ Travel Logistics: Approximately 687 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest December 31 recorded in the last 30 years saw temperatures hit 20.8°C in 2017, while the coldest dropped to -0.4°C in 2015.