Unlike Monday, today features an opportunity for some sunshine as dry air works its way in behind a moisture-starved cold front.
That will be the difference-maker into why we see highs climb into the low 40s this afternoon. We look to hold onto a partly cloudy sky overnight which will allow lows to fall into the upper 20s.
Forecast models then show an area of high pressure sliding across the northern Great Lakes
Tuesday night into Wednesday. This will help turn winds to the southeast
Wednesday afternoon, leaving highs right around the 40 degree mark. Skies remain mostly cloudy through mid-day Wednesday but an upper-level disturbance and increase in moisture will allow some patchy drizzle, and then light rain, to develop late in the afternoon and
evening. Rainfall totals are not expected to be much and will only add
up to a few hundredths of an inch.
Before we get into Christmas Day, here is a glance at the record books. It's safe to say these records will stand for another year as we're not going to see any big-time heat, cold, rain, or snow. Our warmest Christmas occurred back in 2019 when the mercury climbed
to 59 degrees. I remember that day well because I was in shorts! The average high is 32 degrees. Highs this time around will fall in the middle of that range, landing in the low 40s.
Light showers are likely to develop as both the warm front and surface
low pressure system move in northern Illinois Thursday night. Showers should develop after 8pm or 9pm and last into the early stages of Friday. All-in-all, rainfall amounts between will remain under a quarter of an inch. The rest of Friday should remain dry with highs peaking in the mid 40s under a mostly cloudy sky.
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