A surge of warmth is coming today and late this week, with highs near or in the 60s. This will be punctuated briefly by a cooler day Wed in the mid-50s, which is still almost 10ºF above normal this time of year. Enjoy the warmth while it lasts because there will be a colder pattern next couple of weeks, starting as soon as this weekend.
Rest of today – warm and sunny with high temperatures around 60ºF. Overnight lows drop to around 40ºF with a backdoor cold front moving through overnight.
Wednesday – the backdoor cold front’s primary impact will be to make Wednesday cooler, in the mid-50s, with a good amount of sun. Overnight lows will be in the mid-60s.
Thursday – this is when the warmth really surges with the backdoor cold front returning northeast as a warm front. Behind this, south winds will lead to temperatures rising well into the mid-60s. The only cap on temperatures will be possible partly sunny cloud cover. Overnight lows in the mid-50s.
Climate Prediction Center’s 6-10 day temperature outlook for 3/14-3/18. Much of the country is likely to see colder than normal temperatures. 
Climate Prediction Center’s 8-14 day temperature outlook for 3/18-3/22. The cool conditions look set to continue.
Friday – a cold front approaches the region from the west. Ahead of this, temperatures remain warm in the mid-60s. A chance of rain will accompany the passage of the front. Otherwise, expect mostly cloudy skies. Overnight lows dropping into the mid-40s. Temperatures will continue to drop through weekend.