Posted By Meteorologist Matt Holiner (5:35pm, 6/17/15)
It's been a brutal stretch this past week. Until today, our highs have been in the 90s every day since last Thursday. Typically our highs are in the mid to upper 80s this time of year. We don't start averaging highs in the 90s until July. We haven't had much relief at night either, with our overnight lows being the low to mid 70s.
So far this month, our average temperature (for all hours of the day) has been 76.1. That's lower than you might expect because, though it seems like a distant memory, we started the month with below average temperatures and lots of rain. Still, we typically have an average temperature of only 73.4 in June.
Our current average temperature doesn't place June 2015 in the top ten warmest Junes on record, but before the month is over, it could be. That's because our high temperatures will be returning to the 90s tomorrow and will likely stay there for much of the rest of the month.
The reason for it? There's been a ridge of high pressure camped out over the southeastern U.S. lately. These ridges are associated with relatively quiet, but warm weather. The pattern doesn't look to change anytime soon. Check out the map below. The orange is relatively high pressure and the blue is relatively low pressure. This map is for next Thursday (June 25th) and shows yet another ridge of high pressure centered over the southeastern U.S.
(Courtesy: WeatherBell Analytics)
The areas under this ridge, including Central Virginia, will continue to see hot weather. Check out the image below. This shows where above and below average temperatures are expected late this month. While the best chance of seeing above average temperatures will be in Georgia, the heat will likely continue for us as well.
(Courtesy: Climate Prediction Center)
There are hints that this pattern will break at the very end of the month, so for now it doesn't look like the entire summer will be warmer than average. July is typically are warmest month of the year though, so don't expect dramatic improvements in the heat. Lots of pool days ahead!