Welcome to Northern Virginia, home of the most unpredictable weather. There is an entire spectrum of weather throughout the school year. Overall, the weather is beautiful for each season, even with randomly warm days or sudden snow. To amplify how the weather cannot be precedented here, there was a year where 3 feet of snow hit the University, and another year where it didn't snow at all. But overall, the weather fits into the stereotype of each season.
Fall is lukewarm, as it goes into a cooler climate. Winter is, overall, cold with random days where it will be inexplicably warm. Spring is rainy and musky, and starts to increasingly warm up right before you get out of school in early May. For the majority of the months that school is in session, it will be cold—so bring more wintry attire than you think are necessary. Invest in a good pair of rain boots, as you'll find them useful when walking across campus in the harsh sleet that winter brings or the weekly rain in March and April.