Arizona – A calm, clear desert morning greets the Valley as Phoenix wakes under moonlit skies and mild air. It feels more like early fall than mid-December, and that pattern holds steady for days.
According to the National Weather Service, temperatures start in the upper 50s this morning, already comfortable for early commuters and walkers. Skies remain clear, winds stay light, and no travel issues are expected. It’s a smooth start to the day across the metro.
Sunshine dominates today. Afternoon highs climb near 77 degrees, well above typical December averages. To be fair, conditions feel almost springlike by mid-afternoon. Outdoor plans, construction work, and holiday errands all benefit from the stable weather.
Tonight stays mild, with lows near 50 degrees under mostly clear skies. Wednesday follows the same script. Bright sun returns, highs reach the mid-to-upper 70s, and winds remain calm. Air quality remains favorable, and no precipitation is in sight.
Thursday, December 18th, brings no major changes. Highs again approach the upper 70s, with clear skies from sunrise through sunset. This continued warmth highlights a strong contrast to winter weather gripping much of the country. For now, Arizona stays quiet.
By Friday, temperatures peak near 79 degrees. That warmth may tie late-season records in some Valley locations. Even evenings stay comfortable, with lows holding in the low 50s.
The weekend looks equally inviting. Saturday and Sunday trend sunny and warm, with highs in the upper 70s to near 80. These conditions are ideal for Christmas travel, outdoor shopping, and seasonal events. Hydration and sun protection remain important, even in December.
Meteorologists note this persistent ridge as a classic desert winter pattern. No cold snap or rain signals appear in the short-term outlook.
Enjoy the sunshine, and tell us—does this December warmth feel welcome or unusual where you live?
5-Day Outlook – Phoenix, AZ
- Today: Sunny, calm, high near 77°
- Wednesday: Sunny, high near 76°
- Thursday: Sunny, high near 77°
- Friday: Sunny and warm, high near 79°
- Saturday: Sunny, high near 78°
