Some of you have unrealistic expectations. Climate is not static. It’s probably the case that snowfall over the last seven years is more normal for DC’s climate today than snowfall decades ago.
Just look at temperatures, the mean for December & January is 8th warmest overall dating to the early 1870s, yet 6 of the preceding 22 winters were as warm or warmer over that time frame. Two others are within a half degree (2017, 2020). Counting this winter, fully 9 of the past 23 winters had a December & January mean of at least 42F - a reading that in the past would be considered extreme. That means these conditions are more or less normal over the past quarter century. This is not an atypical DC winter - this is a typical DC winter of the 21st century.
There is a very strong negative correlation between temperature and snowfall, so it only stands to reason that snowfall, on the average, would be less. Also 80 degree readings in January might not be that extreme. Yes, it’s only happened once in recorded history now. But in the current climate era, it might be an event expected to occur once a decade or so. We don’t have enough data to say so.