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Petersburg, IL 62675 Weather
Current conditions
Forecast for this hour (no station report in the last two hours)
Forecast
10-day-
Tonight
Clear, with a low around 48. East wind 0 to 3 mph.
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Friday
Sunny, with a high near 76. Southeast wind around 6 mph.
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Friday Night
Mostly clear, with a low around 46. Southeast wind around 5 mph.
National Weather Service forecast updated 7 hrs ago.
Hourly
Hourly forecast- Now72°
- 7 PM67°
- 8 PM60°
- 9 PM58°
- 10 PM56°
- 11 PM55°
- Fri12 AM53°
- 1 AM52°
- 2 AM51°
- 3 AM50°
- 4 AM49°
- 5 AM48°
- 6 AM48°
- 7 AM48°
- 8 AM49°
- 9 AM55°
- 10 AM63°
- 11 AM68°
- 12 PM71°
- 1 PM74°
- 2 PM75°
- 3 PM75°
- 4 PM76°
- 5 PM74°
10-day forecast
Details- TodayOct 22Sunny48°77°
- FriOct 23Sunny46°76°
- SatOct 24Mostly Sunny47°75°
- SunOct 25Mostly Sunny50°78°
- MonOct 26Partly Sunny48°77°
- TueOct 27Partly Sunny44°70°
- WedOct 28Mostly Sunny46°69°
- ThuOct 29Partly cloudy0.04 in40°62°
- FriOct 30Sunny34°52°
- SatOct 31Partly cloudy37°57°
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 in Illinois
More weather news- Capitol Fax.com - Your Illinois News Radar » Good morning!
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…
- Central Illinois Winter Weather Outlook
The winter weather outlook for central and southeast Illinois has been released, and a detailed summary is available at this link. Some of the highlights: Current Conditions Latest Observations Daily Climate Maps…
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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…
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Overnight Frost Advisory for parts of Illinois, NW IndianaCBS News Colorado 10pm Saturday CBS News Detroit Weekend 11pm CBS News Los Angeles Weekend 9pm CBS News Philadelphia Weekend 11pm KDKA News Weekend 11pm CBS News Texas Weekend 10pm
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Frost advisory back in effect for Central IllinoisWAND DECATUR, Ill. (WAND) – Another cool day starts the weekend across Central Illinois with highs Saturday only reaching the upper 50s under plenty of sunny skies. Strong high pressure remains in control keeping skies…
Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- ThuModerate
- FriModerate
- SatModerate
Springfield, IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlySpringfield Area, records since 1879. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Springfield 29 km
- Jacksonville 45 km
- Lincoln 44 km
- Chatham 39 km
- Beardstown 49 km
- Auburn 48 km
- Sherman 25 km
- Rochester 40 km
- Riverton 32 km
- Virden 57 km
- South Jacksonville 47 km
- Havana 37 km
Forecasters' discussion
From the National Weather Service office in ILX, issued 3 hrs ago
Key Messages
- Sunny mild days and cool nights persist across central and southeast Illinois through Monday, with highs in the 70s and lows in the 40s.
- A cold front moves across the region mid next week, though rain chances look pretty slim (20% or less), with temperatures cooling a bit for late next week.
Discussion
Issued at 116 PM CDT Thu Oct 22 2026
The stretch of dry, low-impact weather will span into next week as the central U.S. remains under the influence of a blocking pattern, which is only forecast to amplify through the weekend.
The net effect will be ideal mid-autumn weather with daily highs in the 70s and overnight lows in the 40s. For those keeping score at home, these temperatures are averaging about 8 degrees warmer than what is considered normal for middle October. While not record- warmth by any means, it is nevertheless impressive.
Mid-range deterministic model guidance demonstrates strong consistency regarding the progression of the broad western trough into early next week. While successive model cycles continue to open and eject this feature northeastward through the Central Plains, the attendant cold front consistently fails to push through central Illinois. Rather, the surface low undergoes occlusion over the Canadian Prairies, causing the trailing front to stall and weaken over the Great Lakes before eventually washing out and retreating north as a warm front.
It's not until Wednesday that a strong mid-level shortwave trough pivots across the Mid-Mississippi Valley and drives a surface cold front through the Midwest and Great Lakes region, effectively breaking down our resident ridge. This could be our next best chance for scattered showers and isolated thunderstorms, though current blended (NBM) and ensemble guidance (GEFS/EPS) mute the probability at 20% or less.
Aviation
Issued at 1240 PM CDT Thu Oct 22 2026
VFR conditions will persist through the TAF cycle as a ridge of high pressure maintains clear skies and light winds.
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 4Conservative index and reflects what the press published. Terms of use.