Tuesday was the hottest day of the summer so far. Rockford clocked in at 90 degrees for just the second time this year. But now we are back to below average temperatures….and overall, it looks to stay that way for a while.
Long range forecasting models continue to show a northwest flow weather pattern for the rest of July. The jet stream will bring in an airmass originating from northwestern Canada, keeping the heat confined to the southern United States.
Generally speaking, temperatures have a high likelihood of remaining below our climatological average. Statistically speaking, our average high for the rest of July is 84 degrees. Our average low is 63 degrees. Many of the upcoming days will only see highs in the 70s and lows in the 50s.
Looking ahead to August, it appears the trend for below average temperatures will continue. That’s not to say we won’t have a hot and humid day every now and then. However, data compiled through the National Climatic Data Center (NCDC) suggests that odds are about one-third higher than usual for cooler-than-normal temperatures for much of the upper Midwest, including northern Illinois and southern Wisconsin.
As far as rainfall goes, many of us could use a few showers. Wednesday marked the 8th day in a row without rain at RFD Airport, the longest such dry streak of the year. The chance of rain will increase Friday and into the weekend.
Over the course of the next two weeks, model trends indicate a near-normal rainfall forecast. “Near-normal” means between an inch or two of rainfall.
This post was written by Joe Astolfi on July 23, 2014