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Chicago forecast

Forecast Highs Lows Rain Model accuracy

Chicago, Midway station · using data from 2026-10-15T12:50 UTC · from the forecast models, not an official forecast

Today · Oct 15
rain67° / 58°

models 63–69°

Rain 100% · 0.31 in

Model agreement
High poor Low fair Rain good AIGFS 63° to GEM 69°
Tomorrow · Oct 16
drizzle62° / 46°

models 56–69°

Rain 61% · 0.09 in

Model agreement
High poor Low poor Rain fair AIGFS 56° to ECMWF 69°low 41–48°

What changed Tue Oct 20: Models now agree — highs 60–72°, closest to the cooler camp

Watch a date in Chicago and see what each new model run does to it, with the full forecast beside it. Request an invite; it's free during the beta.

After tomorrow

Model agreement

How to read this

The big number is our blend of every model, each corrected by how it has verified here. Where there is no blend yet, it is the middle model's.

Under it, the range is the lowest and highest high the forecast models give for the day. Where they disagree a lot, the two models at the ends are named.

Rain is the middle model's chance of rain and the middle model's total.

Model agreement is how close the models' forecasts for one day sit to each other once each model's usual lean at the place is set aside, judged separately for the high, the low and rain: good, fair or poor against how far apart they usually are that many days out, and for rain against the band of chances where a plan changes.

These are the numbers from the models' last run we stored, at the time above. They are not an official forecast, and this page carries no weather warnings: for those, see the National Weather Service.

SatOct 17
partly cloudy
57° / 40°54–57°
0%0–32%
High good Low good Rain fair
SunOct 18
clear
63° / 43°57–63°
0%
High good Low good Rain good
MonOct 19
cloudy
65° / 44°62–67°
0%
High good Low fair Rain good
TueOct 20
cloudy
67° / 47°62–68°
0%0–19%
High good Low poor Rain good low 37–56°
WedOct 21
partly cloudy
69° / 51°64–71°
3%1–24%
High good Low fair Rain good
ThuOct 22
partly cloudy
71° / 53°66–72°
11%
High good Low poor Rain good low 44–59°
FriOct 23
cloudy
72° / 56°64–76°
16%7–20%
High fair Low fair Rain good
Show all 12 days
SatOct 24
partly cloudy
72° / 58°57–77°
13%
High poor Low poor Rain good ECMWF 57° to AIFS 77°low 47–62°
SunOct 25
cloudy
67° / 52°55–77°
14%
High poor Low poor Rain good ECMWF 55° to AIFS 77°low 40–60°
MonOct 26
cloudy
66° / 51°57–69°
11%
High fair Low fair Rain good
TueOct 27
drizzle
62° / 54°56–74°
15% · 0.10 in
High poor Low poor Rain good ECMWF 56° to GFS 74°low 43–61°
WedOct 28
drizzle
63° / 53°58–66°
25% · 0.10 in
High good Low poor Rain fair low 40–61°

Going deeper

Each model's high, day by day → Each model's low → Each model's rain → Which models have been right here →