FORECAST SUMMARY: Monday, December 22, 2025 - Monday, December 29, 2025
PM-2.5: 24-hour daily average Fine Particulate concentrations will average between Good (Green AQI) and Moderate (Yellow AQI).
FORECAST DISCUSSION:
For those dreaming of a white Christmas, some areas will experience one while others will go without this year. A few storm systems are passing through this holiday week with temperatures warm enough for rain at times. The first system is a warm front with light snow Monday, changing to a mix or just rain early Tuesday. A break is expected from Tuesday to Wednesday as high pressure slides over the state. Yet another system arrives late on Christmas Day. Temperatures accompanying this system are borderline between causing freezing or liquid precipitation, so travelers should check local weather conditions prior to traveling.
As for air quality, prolonged periods of stagnation are not expected over the next week. Many locations may see fine particulate concentrations in the middle Moderate range, especially during the morning hours, but daily averages of fine particulates higher than the Moderate range are not anticipated over the next week. Air quality levels between the Good and Moderate ranges can be expected throughout the period.
EXTENDED FORECAST:
Extended forecast models show northerly winds behind a late weekend storm that brings in colder temperatures. Precipitation may start as rain as the system moves in; however, rain will change to snow as the cold air filters in. Any Moderate fine particulate readings should improve to Good early next week.
Next Forecast update: Monday, December 29, 2025