[3:45am CST 11/5]
A fairly strong cold frontal passage will move across the area early this eve & bring the first bout of true late fall-like temps thus far this season. This will be driven by blustery northerly winds (strongest near the lake) lasting thru Fri. #ILwx #INwx (1/2)

Freezing temps likely inland of Lake MI Fri night into early Sat, but mild wx returning Sun-Mon. Otherwise, on & off showers & drizzle this AM followed by sct'd showers this aftn & eve. Lake effect rain showers expected into parts of NW #INwx later tonight-Fri eve. #ILwx (2/2)

Pockets of light showers and/or drizzle will likely continue this evening and into tomorrow. Lake effect rain showers are then expected to develop across northwest Indiana Thursday night and will persist into Friday. A cold front will usher in cooler conditions for the weekend.

[3:43 AM CST 11/4/2026]

Much more seasonable conditions for early November will arrive in the wake of the cold front passage this morning, with Friday into early Saturday being the coolest period of the upcoming stretch through the weekend.

#ILwx #INwx (1/2)

[3:43 AM CST 11/4/2026]

Isolated light showers and/or patchy drizzle will likely persist into this evening, with additional showers on Thursday into Thursday evening, and lake effect rain showers into northwest Indiana later Thursday night into Friday.

#ILwx #INwx (2/2)

Showers are likely tonight into Wednesday morning. Some more scattered showers are expected Thursday into Friday before dry weather returns this weekend. Temperatures will gradually fall to cooler, more seasonable levels this week.

Expect windy and warm conditions today, especially with eastward extent, followed by a widespread soaking rain later today into early Wed. Wed and Thu will be breezy and a bit cooler each day, and then Fri-Fri night will be much closer to seasonable for early Nov. #ILwx #INwx

Approximate timing (refer to inset maps) for the gradually increasing shower coverage from west to east into this eve. Ahead of the rain & low clouds, expect stronger winds (gusts to ~40 mph from south). A few isol'd t-storms may occur w/in highest rain coverage. #ILwx #INwx

Expect on and off showers over the next couple of days. After a mild day tomorrow, temperatures will stair-step down closer to normal for early November. #ILwx #INwx

[3:31am CST 11/2] Today into Tuesday will be cloudy, breezy, & mild, with a few rain drops at times ahead of a slow moving weather system. The first widespread soaking rainfall in a few weeks is expected later Tue into early Wed ahead of the system’s cold front. #ILwx #INwx (1/2)

[3:31am CST 11/2] While a modest cool down is expected for the 2nd half of the workweek, temps will still be above average for early Nov until a more pronounced cool-down over the upcoming weekend. Visit weather.gov/Chicago for the latest forecast updates! #ILwx #INwx (2/2)

Expect periods of showers over the next several days, with the highest widespread rain chances late Tuesday into Wednesday.

October 2026 was unseasonably warm across the region, finishing as a top ten warmest October for both Chicago and Rockford. The month was also drier than normal for most, with the bulk of its rain occurring across 2-3 days. More info here: weather.gov/lot/october2026

#ILwx #INwx

Intermittent shower chances will linger through at least the middle of the week with the best chances for rain on Tuesday and Wednesday. While temperatures will remain above average to start the week, cooler weather is forecast to arrive next weekend. #ILwx #INwx

Some may see intermittent light showers or sprinkles during trick or treating hours tonight. Seasonably mild temps and mostly cloudy skies will then follow into early next week. The highest chances of rain are expected towards mid-week. #ILwx #INwx

[7:01 AM CDT Saturday 10/31/2026]
We've updated our #Halloween climate data page for #Chicago and #Rockford to give some context on today's weather (expected high in the 60s with occasional light rain/sprinkles). #ILwx (1/4)

Even more memorable (especially if you like snow & cold, not so much if you don't!) was 2019: The snowiest Halloween on record for both #Chicago (3.4") & #Rockford (3.1"). High of 33° at both sites made it 2nd coldest Halloween for Rockford & 3rd coldest for Chicago. #ILwx (3/4)

Visit weather.gov/lot/halloween_… for additional information. #ILwx (4/4)

[3:40 AM CDT 10/31]
A cloudy & mild #Halloween w/intermittent light rain or sprinkles at most during trick or treating, as shower coverage is expected to diminish vs. this AM in parts of area. Daylight Saving Time ends tonight (2 AM Sun): Set those clocks back!

#ILwx #INwx (1/2)

[3:40 AM CDT 10/31]
The first week of November will start on a mild and breezy note, followed by a period of wet weather centered on the midweek period.

Visit weather.gov/Chicago for the latest forecast updates!

#ILwx #INwx (2/2)