There may be a few isolated thundershowers around the region by this afternoon. And Thursday could produce a couple more. But the way forecasters see it, this should be a mostly sunny week. Finally.

But all that sunshine in the wake of the summer solstice is going to heat us up a lot. High temperatures by Thursday should be near 90 degrees, and the readings will stay there right through the weekend. Summer is here, with the temperatures to match - about 5 degrees above the long-term averages for late June.

The heat late this week will also likely get the mosquito populations revved up, so you may not be able to spend much time outdoors by then.

So, if you have something you need to do outside, best get it done today, or by Wednesday at the latest. I was out there cutting the grass and seeding some bald spots this morning (working a late shift this week) because I know I won't want to face it by Thursday.

Overnight lows will begin to stall around 70 degrees by Thursday, too. We may need the AC on by then to cool things down for a nice night's sleep.

Forecasters out at Sterling say the relatively cool, breezy weather we've been enjoying comes to us thanks to an unusually strong (for this time of year) low-pressure system off the New England coast. That's dragging fresh breezes down from the north. We could see gusts to 20 or 25 mph this afternoon. 

But we could also get a few little showers or storms from the same setup by afternoon as those disturbances reach the Chesapeake Bay. 

By Wednesday night, a weak cold front could pass through and set off a few more showers, but the risks are low - just 20 percent if the forecast holds up.