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Lewistown, IL Weather
Current conditions
Observed at Macomb Municipal Airport · 1 hr ago
Forecast
10-day-
Saturday
Mostly sunny, with a high near 75. South southeast wind 2 to 7 mph.
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Saturday Night
Mostly cloudy, with a low around 49.
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Sunday
Partly sunny, with a high near 78.
National Weather Service forecast updated 2 days ago.
Hourly
Hourly forecast- Now75°
- 5 PM73°
- 6 PM70°
- 7 PM67°
- 8 PM63°
- 9 PM60°
- 10 PM57°
- 11 PM55°
- Sun12 AM55°
- 1 AM54°
- 2 AM53°
- 3 AM52°
- 4 AM51°
- 5 AM50°
- 6 AM49°
- 7 AM50°
- 8 AM53°
- 9 AM57°
- 10 AM62°
- 11 AM66°
- 12 PM71°
- 1 PM74°
- 2 PM76°
- 3 PM78°
10-day forecast
Details- WedOct 21Sunny47°74°
- ThuOct 22Sunny48°76°
- FriOct 23Sunny48°76°
- TodayOct 24Mostly Sunny49°75°
- SunOct 25Partly Sunny50°78°
- MonOct 26Partly Sunny48°75°
- TueOct 27Partly Sunny then Slight Chance Rain Showers15%45°67°
- WedOct 28Cloudy47°70°
- ThuOct 29Heavy rain0.37 in41°68°
- FriOct 30Sunny37°59°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Lewistown
More weather news-
Abnormally warm air settles into Montana before big cooldown this weekendMontana is enjoying some unseasonably warm weather this week, with highs reaching the 60s and 70s across much of the state, but a cooldown is on the way. A trough of low pressure moves in Thursday night, bringing heavy…
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Precipitation totals as of Oct. 14Editor’s note: Figures for October precipitation were not available from the Lewistown Airport location. Figures are instead from a location 15 miles southwest of the airport. Month to Date: 1.72 inches Last year for…
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Thursday, Oct 22, 2026 - Posted by Isabel Miller DOMi & JD BECK, Herbie Hancock… - Barton - Thursday, Oct 22, 26 @ 8:53 am: Oh yeah, and you have to monitor comments between it all. Thank you for the lessons…
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Strong El Niño likely means a milder winter for northern Illinois, climatologist saysAfter a record tornado year, northern Illinois may get a break: forecasters favor a warmer-than-average winter as El Niño strengthens in the Pacific. El Niño refers to a warming of the Pacific Ocean’s surface that…
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Gorgeous weather continues for Central IllinoisWEDNESDAY: Warming up with sunny skies and calm conditions. High: 75 Low: 47 THURSDAY: Above average with sunny skies. High: 76 Low: 47 FRIDAY: Nice weather continues with sunny skies. High: 76 Low: 46 SATURDAY: Some…
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Another beautiful day ahead for Central IllinoisDECATUR, Ill. (WAND) – If you’re looking for a reason to get outside, Tuesday is your day. A high-pressure system settling over the Midwest is bringing abundant sunshine and calm winds to Central Illinois, with…
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One of the year’s most pleasant weather stretches arrives in Central IllinoisDECATUR, Ill. (WAND) – A beautiful stretch of sunshine and mild temperatures is settling into the region, and it’s the perfect time to get outside and enjoy it. High pressure is taking control of the Midwest, locking in…
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A great week ahead for Central IllinoisWAND DECATUR, Ill. (WAND) – A wonderful weekend across Central Illinois carries into the start of the workweek. Overnight lows dip back into the upper 30s tonight with a small risk for patchy frost, though coverage will…
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Sunshine, chilly mornings and a big warm-up ahead for central IllinoisCENTRAL ILLINOIS (25News Now) - Fall is making an appearance across central Illinois this weekend, but don’t get too comfortable with the chilly temperatures. After a cold start on Sunday morning, sunshine will help…
Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- SatModerate
- SunModerate
- MonModerate
Peoria, IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Nearby
- Peoria 58 km
- Pekin 48 km
- East Peoria 57 km
- Macomb 44 km
- Canton 21 km
- Bartonville 51 km
- Beardstown 48 km
- Creve Coeur 55 km
- West Peoria 56 km
- Abingdon 50 km
- Havana 13 km
- Bushnell 35 km
Forecasters' discussion
From the National Weather Service office in ILX, issued 2 hrs ago
Key Messages
- No significant weather is anticipated across central Illinois over the next week.
Discussion
Issued at 212 PM CDT Sat Oct 24 2026
18z/1pm surface analysis shows a sprawling ridge of high pressure from Quebec to the Gulf Coast. Meanwhile a 992mb low is tracking across northern Manitoba with its trailing cold front extending southward into the Plains. Despite high clouds streaming across the region from the northwest, partial sunshine has heated the dry airmass quite efficiently this afternoon...resulting in current temperatures in the lower to middle 70s. As has been the case for the past several days, readings will quickly drop after sunset...with overnight lows ranging from the lower to middle 40s in the Wabash River Valley to around 50 degrees along/west of the Illinois River.
The Manitoba low will continue to track eastward over the next 24 hours, gradually pulling the cold front southward toward Illinois. However as the boundary becomes parallel with the upper flow, it will lose its southward momentum and remain well W/NW of the KILX CWA. As a result, the stretch of very warm and dry weather will continue through the middle of next week as highs routinely climb into the middle to upper 70s while overnight lows drop into the upper 40s and lower 50s.
A second short-wave trough and its associated surface low traversing southern Canada will push another cold front southward toward the region by the end of the week. With all 12z Oct 24 models showing a slight weakening of the upper ridge, it appears this boundary will drop a bit further south than the first. With GFS precipitable water values edging up to 1.25-1.50 immediately along/ahead of the approaching front, have added 20 PoPs for showers to the forecast Thursday and Thursday night along/north of a Macomb to Minonk line. The front will gradually dissipate and/or lift back northward on Friday, resulting in a return to warm/dry conditions across the board.
Aviation
Issued at 1219 PM CDT Sat Oct 24 2026
VFR conditions will prevail through the entire 18z TAF period. SCT-BKN mainly high clouds will stream across the sky, although a few passing clouds at around 12,000-15,000ft will be possible from time to time as well. Winds will be S/SE at less than 10kt.
Ilx Watches
None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.