Peotone Weather

National Weather Service Forecast for: 2 Miles SE Peotone, IL Issued by: National Weather Service Chicago/Romeoville, IL

Updated: Wed, 06-May-2026 2:36am CDT

- Select Forecast - Peotone, IL Manteno, IL Beecher, IL Monee, IL Kankakee, IL Willmington, IL Braidwood, IL Manhattan, IL OakForest, IL Stelle, IL Ottawa, IL Amboy, IL Byron, IL Rockford, IL Quad Cities, IL Champaign/Urbana, IL Peoria, IL Bloomington, IL Springfield, IL Carbondale, IL Vienna, IL Culver, IN

Peotone, IL

Wednesday Mostly Cloudy Thursday Patchy Frost then Chance Rain Showers Friday Rain Showers Likely Saturday Mostly Sunny Sunday Chance Rain Showers Monday Mostly Sunny Tuesday Chance Rain Showers   Hi 57 °F Hi 60 °F Hi 64 °F Hi 74 °F Hi 64 °F Hi 63 °F Hi 68 °F   Overnight Mostly Cloudy Wednesday Night Partly Cloudy then Patchy Frost Thursday Night Chance Rain Showers Friday Night Showers And T-Storms Likely Saturday Night Chance Showers And T-Storms Sunday Night Partly Cloudy Monday Night Partly Cloudy   Lo 40 °F Lo 36 °F Lo 44 °F Lo 45 °F Lo 50 °F Lo 42 °F Lo 43 °F

Forecast from NOAA-NWS for 2 Miles SE Peotone, IL.

244
FXUS63 KLOT 060751
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
251 AM CDT Wed May 6 2026

.KEY MESSAGES...

- Frost is possible tonight away from the more urbanized areas,
  with localized freezing temps possible.

- While the majority of the time will be dry, there will be a
  few opportunities for showers Thursday through the upcoming
  weekend.

- Other than a possible brief warm up Saturday, temperatures
  will remain mostly near to below average through early next
  week.

&&

.DISCUSSION...
Issued at 251 AM CDT Wed May 6 2026

Large scale pattern across North America will be dominated by
sprawling, deep Hudson Bay trough. Our area will generally
remain in the northwest flow on the southwestern flanks of this
large trough. This will provide us with a steady feed of
seasonably cool air and multiple clipper-like northwest flow
low amplitude disturbances bringing occasional shower chances
through the weekend. The northwest flow will also keep richer
Gulf moisture bottled up well to our south, so despite multiple
chances of rain, rainfall amounts should be on the lighter side.

While there will likely be some breaks at times, mid and high
cloudiness looks to be pretty extensive today. Source region for
our air mass saw dewpoints in the upper teens to mid 20s Tuesday
afternoon and even with the cloud cover potentially throttling
back the depth of mixing slightly, still anticipate some very
low dewpoints/afternoon RH today and have continued trend from
previous shift going with the low end of the guidance spectrum.

Tonight`s temperatures and frost/freeze potential are tricky.
Models continue so suggest large patches of mid-high level
cloudiness will traverse the area tonight. Given the expected
light winds, any meaningfully large hole in cloud cover could
allow temps to locally tank. In fact, we could see temps
fluctuate at times tonight dependent on the state of the cloud
cover. If mid-high clouds end up not as big of a factor, then
low temps could end up lower than forecast with even temps
near/slight below freezing possible in the typically colder
areas. In addition to uncertainty about temps and cloud cover,
given the light flow, dewpoints may not recover much tonight,
possibly remaining in the 20s and lessening the frost threat.
Seems like the course of least regret will be issuing a frost
advisory for sizable portion of our CWA (away from the urban
corridor), but given the uncertainties, will defer to the day
shift for issuance of a frost advisory. Hopefully by this
afternoon, cloud cover trends may be more apparent, leading to
higher confidence in temps and subsequent frost or even
localized freeze threat tonight.

A pair of low amplitude northwest flow shortwaves will move
across the region, the first late Thursday and the next about 24
hours later late Friday. As mentioned earlier, these systems
will be somewhat moisture starved, but most guidance does
support some light QPF as forcing squeezes out what little
atmospheric moisture is available. Dry low levels may also tend
to eat away at some of the potential precip as low levels will
require some top down moistening. Given the recent trends in
guidance to latch onto the Thursday shortwave, coordinated with
surrounding offices to introduce some chances pops Thursday
afternoon/early evening. NBM pops for Friday looked reasonable
and no changes were needed.

There still looks to be an opportunity to sneak in one rather
warm day Saturday with robust warm air advection driven by gusty
southwest winds in advance of the next shortwave trough. As is
often the case with these lower amplitude waves, there is some
spread in ensembles regarding timing, but generally looks like
that trough will bring another chance of showers to the area
sometime in the Saturday night or Sunday time frame. That looks
to be followed by another shot of below average temps to end the
weekend and into Monday of next week.

- Izzi

&&

.AVIATION /06Z TAFS THROUGH 12Z THURSDAY/...
Issued at 1243 AM CDT Wed May 6 2026

There are no significant aviation forecast concerns for the
current TAF period. Sustained 10-15 kt west-northwesterly winds
with gusts to around 20 kts are expected to develop by the late
morning amidst VFR cloud cover.

The one exception to this may be GYY, which will be in close
enough proximity to the lake breeze for winds to be a bit
lighter and possibly variable there if the lake breeze boundary
ends up positioning itself over the GYY airfield. If the lake
breeze ends up progressing farther inland/westward than
currently expected, then northeasterly winds may prevail there
instead this afternoon, but think that the west-northwesterly
winds to the west of the lake breeze should be strong enough to
preclude such an outcome.

Winds will become light or calm again at all TAF sites after
sunset as the boundary layer decouples and surface high pressure
settles into the region.

Ogorek

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...None.

&&

$$

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