Peru, IL 61354 Weather

LaSalle County1:33 AM CDT41.33°N, 89.13°W

Current conditions

Clear
49°
Clear
Feels like 49°
High 73°·Low 43° tonight
WindCalm
Humidity74%
Dew point41°
Cloud cover3%
UV index0 Low
Sunrise7:16 AM
Sunset6:08 PM

Forecast for this hour (no station report in the last two hours)

Forecast

10-day

  • Tuesday Night

    Clear, with a low around 43. East northeast wind 0 to 5 mph.

  • Wednesday

    Sunny, with a high near 73. Southwest wind around 0 mph.

  • Wednesday Night

    Mostly clear, with a low around 47. Wind around 0 mph.

National Weather Service forecast updated 21 hrs ago.

Hourly

Hourly forecast
  1. Now Clear 49°
  2. 2 AM Clear 47°
  3. 3 AM Mostly Clear 46°
  4. 4 AM Clear 45°
  5. 5 AM Clear 44°
  6. 6 AM Sunny 43°
  7. 7 AM Sunny 43°
  8. 8 AM Sunny 45°
  9. 9 AM Sunny 51°
  10. 10 AM Sunny 57°
  11. 11 AM Sunny 62°
  12. 12 PM Sunny 66°
  13. 1 PM Sunny 70°
  14. 2 PM Sunny 71°
  15. 3 PM Sunny 72°
  16. 4 PM Sunny 72°
  17. 5 PM Sunny 70°
  18. 6 PM Clear 67°
  19. 7 PM Mostly Clear 63°
  20. 8 PM Clear 60°
  21. 9 PM Clear 58°
  22. 10 PM Mostly Clear 56°
  23. 11 PM Mostly Clear 55°
  24. Thu12 AM Mostly Clear 54°

10-day forecast

Details
  1. TonightOct 19 Mostly Clear Mostly Clear39°
  2. TueOct 20 Sunny Sunny43°71°
  3. TodayOct 21 Sunny Sunny47°73°
  4. ThuOct 22 Sunny Sunny47°74°
  5. FriOct 23 Sunny Sunny48°72°
  6. SatOct 24 Mostly Sunny Mostly Sunny51°72°
  7. SunOct 25 Partly Sunny Partly Sunny49°73°
  8. MonOct 26 Partly Sunny Partly Sunny10%68°
  9. TueOct 27 Rain Rain0.17 in46°52°
  10. WedOct 28 Sunny Sunny37°51°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news near Peru

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Air quality

58
Moderate
Fine particles (PM2.5)

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • WedModerate
  • ThuModerate
  • FriModerate

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

Sunrise 7:16 AM
Sunset 6:08 PM
Daylight 10 h 52 min (−2 min 37 s tomorrow)
Waxing Gibbous · 75% lit
Moonrise 3:50 PM Moonset 2:14 AM
Full moon Oct 26 New moon Nov 9

Nearby

Forecasters' discussion

From the National Weather Service office in LOT, issued 1 hr ago

Key Messages

- Areas of fog, including potentially dense fog, may develop again late tonight into early Wednesday morning in and near the Chicago metro.

- An extended period of dry and above to much above average temperatures is expected through the upcoming weekend.

Discussion

Issued at 226 PM CDT Tue Oct 20 2026

An Omega block that is in place over the CONUS is expected to persist through the end of the week. The associated ridge axis will only ever so slowly crawl eastward over the coming days, which will maintain broad surface high pressure across the region. As a result, dry conditions with an abundance of sunshine will continue through the remainder of the week with high temperatures remaining above to well above normal for this time of year. Daily lake breezes will cause the coolest (low- mid 60s) high temperatures to be observed near Lake Michigan each day.

Much like last night/early this morning, optimal radiational cooling conditions will likely allow for fog to develop late tonight into tomorrow morning and possibly again in the coming nights/mornings. This will particularly be the case in and near the Chicago metro within the footprint of the marine-influenced air brought inland during the daytime, where the fog could become dense once again.

There is pretty good ensemble agreement at this point in time that the blocking pattern will break down by early next week. This will allow for a cold front to drop through the region sometime on Monday or Tuesday, resulting in a return to cooler and more seasonable temperatures for the middle of next week. The frontal passage may bring a chance for precipitation to the area early-mid next week, but support for this across the latest suite of ensemble guidance is not ubiquitous, and there are considerable temporal differences with when this next potential opportunity for precipitation may arrive as well.

Ogorek

Aviation

Issued at 1213 AM CDT Wed Oct 21 2026

Key Aviation Messages for the current TAF period:

- Fog, locally dense, is possible prior to sunrise, mainly at Chicago Terminals north of a KARR to KMDW line.

Winds are expected to be light and calm through the night. There is another chance for fog to develop this morning. It has already started to develop around and north of KENW where obs are already reporting 1/4SM. While fog development is not a certainty, if/when it does occur, it can be locally dense with vis potentially near zero. Similar to yesterday, vis improvement should be fairly quick after sunrise.

Light southwest winds are expected through much of the day before becoming more southeasterly toward sunset. Once the fog clears, VFR conditions are expected through the end of the TAF. There is another chance for patchy fog tomorrow morning, but the chances are not as great as recently.

DK

Lot Watches

IL...None. IN...None. LM...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.