Halloween Forecast: Increasing cloudiness with a slight chance for evening sprinkle

THURSDAY NIGHT: Becoming mostly cloudy, seasonably chilly. Gusty winds subside. Winds: Northwest 5-10 mph. Low: 39.

Nothing scary about the forecast this year for Halloween. We begin the day with a good deal of sunshine and see clouds gradually gather and increase throughout the afternoon.

Hourly precipitation forecast

No rain is expected through mid-afternoon but a weak disturbance brings a small chance (under 20%) of seeing a brief light shower or a few sprinkles beyond 4 p.m.

Forecast hi-resolution model focused on 6 p.m.

Our in-house hi-resolution model depicts the potential for some sprinkles or a light shower but much of the area will be dry and mostly cloudy.

Friday temperature day planner

Temperatures will be in the upper 30s to near 40-degrees as you head out the door to work or school early Friday morning but warm up to typical Halloween levels during the afternoon in the middle 50s.

Close-Up area mid-afternoon temperature snapshot

Not much variation temperature-wise across the area which has been the case for much of this week.

Trick or Treat forecast

Expect partly to mostly cloudy skies for those beginning around 3pm. By 6pm onward it will remain mostly cloudy with a low chance of a light shower or a few spotty sprinkles. Temperatures will fall from the lower 50s to the upper 40s by Friday evening.

Chicago Halloween climatology

The warmest Halloween ever took place 75 years ago when the high reached 84-degrees. The coldest on record took place in 1873 when the area shivered in sub-freezing temperatures all day and night. The snowiest Halloween took place only six years ago when 3.4” of snow whitened the ground. The high a year ago was 71-degrees and we had some light rain that totaled 0.03”.