Today’s temperatures, which topped out in the mid-to-upper 40s, were more characteristic of mid-December. But as flow shifts from more northerly to southerly over the course of the weekend, temperatures moderate. Tonight though, could well be the season’s coldest so far, a shade chillier than last night even.

Temperatures: Latest D.C. area temperature map. See interactve map on our Weather Wall.

Through Tonight: Whereas overnight winds last night mixed the air enough to prevent temperatures from really toppling, that won’t be the case tonight. Rather, the winds go calm and pretty much everyone tumbles below freezing. Reagan National should record its first freeze right on schedule (the average date happens to be today), although a very light south wind towards morning could foil that. Lows range from the low-to-mid 20s in the colder suburbs to the low 30s downtown.

The weekend: Saturday’s sunny, helping temperatures recover from the 20s and 30s into the mid-50s. It’s not out of the question some high clouds move in late. Winds are light, from the south at 5 to 10 mph. With the southerly flow established, not as cold Saturday night, with lows ranging from the low-to-mid 30s in the cooler suburbs to the low 40s downtown. Even milder yet Sunday, with highs warming into the 60-65 degree territory, despite clouds increasing during the day.

See Camden Walker’s forecast through early next week. And if you haven’t already, join us on Facebook and follow us on Twitter. For related traffic news, check out Dr. Gridlock.

Via @JustinNOAA (on Twitter): “Stunning photo of Caughlin Fire in Reno, taken at 1:00 am by NOAA’s Alexander Hoon”