Monmouth, IL Weather

Warren County11:18 PM CDT40.91°N, 90.65°WElevation 761 ft

Current conditions

Partly Cloudy
57°
Partly Cloudy
Feels like 57°
High 74° Saturday·Low 51° tonight
WindSE 5 mph gusts 15 mph
Humidity69%
Dew point47°
Cloud cover26%
UV index0 Low
Sunrise7:23 AM
Sunset6:12 PM

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

Forecast

10-day

  • Friday Night

    Mostly clear, with a low around 51. Southeast wind around 5 mph.

  • Saturday

    Mostly sunny, with a high near 74.

  • Saturday Night

    Partly cloudy, with a low around 51.

National Weather Service forecast updated 1 day ago.

Hourly

Hourly forecast
  1. Now Partly Cloudy 57°
  2. Sat12 AM Partly Cloudy 56°
  3. 1 AM Partly Cloudy 55°
  4. 2 AM Partly Cloudy 54°
  5. 3 AM Partly Cloudy 53°
  6. 4 AM Partly Cloudy 53°
  7. 5 AM Partly Cloudy 52°
  8. 6 AM Mostly Sunny 51°
  9. 7 AM Mostly Sunny 51°
  10. 8 AM Mostly Sunny 53°
  11. 9 AM Mostly Sunny 56°
  12. 10 AM Mostly Sunny 60°
  13. 11 AM Mostly Sunny 64°
  14. 12 PM Mostly Sunny 68°
  15. 1 PM Mostly Sunny 71°
  16. 2 PM Mostly Sunny 73°
  17. 3 PM Mostly Sunny 73°
  18. 4 PM Mostly Sunny 73°
  19. 5 PM Mostly Sunny 71°
  20. 6 PM Partly Cloudy 69°
  21. 7 PM Partly Cloudy 66°
  22. 8 PM Partly Cloudy 63°
  23. 9 PM Partly Cloudy 60°
  24. 10 PM Partly Cloudy 58°

10-day forecast

Details
  1. ThuOct 22 Sunny Sunny50°76°
  2. TodayOct 23 Sunny Sunny51°75°
  3. SatOct 24 Mostly Sunny Mostly Sunny51°74°
  4. SunOct 25 Mostly Sunny Mostly Sunny51°76°
  5. MonOct 26 Partly Sunny Partly Sunny48°72°
  6. TueOct 27 Partly Sunny Partly Sunny48°66°
  7. WedOct 28 Partly Sunny Partly Sunny15%47°68°
  8. ThuOct 29 Partly cloudy Partly cloudy0.08 in36°58°
  9. FriOct 30 Sunny Sunny32°50°
  10. SatOct 31 Partly cloudy Partly cloudy37°56°

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 Monmouth

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Air quality

50
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • FriModerate
  • SatModerate
  • SunModerate

Rock Island-Moline, 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 7:23 AM
Sunset 6:12 PM
Daylight 10 h 48 min (−2 min 33 s tomorrow)
Waxing Gibbous · 95% lit
Moonrise 4:40 PM Moonset 4:32 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low60° / 40°
Month to date4.20 in (normal 2.03 in)

Galesburg, records since 1896. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in DVN, issued 5 hrs ago

Key Messages

- Above normal temperatures and mostly dry conditions are forecast into early next week, with slightly cooler temperatures possible toward the middle to end of the week.

Short Term

Issued at 215 PM CDT Fri Oct 23 2026

The pleasant late October weather will continue into Saturday with well above normal temperatures and dry conditions.

A 500mb ridge axis will remain situated over the Southern Plains to Mid/Upper Mississippi Valley region, bringing partly sunny skies (passing mid to high clouds) and warm temperatures with highs in the 70s; lows tonight and Sat. night will be in the 50s. Otherwise, expect steady south-southeast winds 5-15 mph, with higher gusts at times during the afternoon hours.

Long Term

Issued at 215 PM CDT Fri Oct 23 2026

By Sunday, a strong low over Hudson Bay will dislodge high pressure from the Great Lakes, pushing it eastward. A diffuse frontal boundary from this system will sag southeastward from the northern Plains, eventually reaching the CWA by Monday and bringing a cooldown to at least part of the CWA. However, model timing still remains quite poor with regard to the front, resulting in a near 10 degree spread across the northwestern half. With this slight cooldown, highs are expected to fall into the mid 60s to mid 70s but remain above the normal highs for late October.

Looking ahead to next week, while guidance has a wide spread regarding that pattern aloft, an eventual return to a more active pattern is expected. Some models, such as the ECMWF, favor a west CONUS trough and eastern CONUS ridge, while the GFS favors a more shallow, near- zonal flow with embedded waves. While the pattern aloft remains unclear this far out, a continuation of our above-normal temperature streak appears likely through the end of October with highs generally in the 60s to 70s.

Additionally, while guidance continues to trend drier along the boundary on Monday, precipitation chances trend higher toward the end of the week. However, there is plenty of uncertainty on placement and timing of systems this far out and the transition to an active pattern may hold off until next weekend. What will favor more widespread precipitation, in addition to a more active pattern, is an increasingly moist airmass with PWATs near 0.8-1.0 inches, or around the 75-90th percentiles.

Aviation

Issued at 604 PM CDT Fri Oct 23 2026

Winds under 10 knots and from the east southeast to southeast through 14z/24. After 14z/24 deeper mixing will begin turnings winds more southerly around 10 knots with gusts up to 20 knots.

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.