Monmouth, IL 61462 Weather

Warren County4:27 PM CDT40.91°N, 90.64°W

Current conditions

Clear
70°
Clear
Feels like 69°
High 71°·Low 45°
WindESE 3 mph
Humidity41%
Dew point45°
Pressure30.31 inHg
Visibility10.0 mi
Cloud cover1%
UV index1 Low
Sunrise7:20 AM
Sunset6:16 PM

Observed at Galesburg Municipal Airport · 52 min ago

Forecast

10-day

  • This Afternoon

    Sunny, with a high near 71. Southeast wind around 5 mph.

  • Tonight

    Clear. Low around 45, with temperatures rising to around 47 overnight. Southeast wind 0 to 5 mph.

  • Wednesday

    Sunny. High near 73, with temperatures falling to around 70 in the afternoon. South wind around 0 mph.

National Weather Service forecast updated 5 hrs ago.

Hourly

Hourly forecast
  1. Now Sunny 71°
  2. 5 PM Sunny 70°
  3. 6 PM Clear 66°
  4. 7 PM Clear 60°
  5. 8 PM Clear 56°
  6. 9 PM Clear 55°
  7. 10 PM Clear 53°
  8. 11 PM Clear 51°
  9. Wed12 AM Clear 50°
  10. 1 AM Clear 49°
  11. 2 AM Clear 48°
  12. 3 AM Clear 48°
  13. 4 AM Clear 47°
  14. 5 AM Clear 47°
  15. 6 AM Sunny 47°
  16. 7 AM Sunny 46°
  17. 8 AM Sunny 48°
  18. 9 AM Sunny 53°
  19. 10 AM Sunny 59°
  20. 11 AM Sunny 63°
  21. 12 PM Sunny 67°
  22. 1 PM Sunny 70°
  23. 2 PM Mostly Sunny 71°
  24. 3 PM Mostly Sunny 72°

10-day forecast

Details
  1. TodayOct 20 Sunny Sunny45°71°
  2. WedOct 21 Sunny Sunny47°73°
  3. ThuOct 22 Sunny Sunny49°75°
  4. FriOct 23 Sunny Sunny50°72°
  5. SatOct 24 Mostly Sunny Mostly Sunny53°72°
  6. SunOct 25 Partly Sunny Partly Sunny50°72°
  7. MonOct 26 Partly Sunny Partly Sunny15%46°67°
  8. TueOct 27 Cloudy Cloudy0.04 in49°60°
  9. WedOct 28 Rain Rain0.28 in46°53°
  10. ThuOct 29 Sunny Sunny41°56°

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

Radar

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Weather news near Monmouth

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Air quality

32
Good
Ozone

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

Forecast

  • TueGood
  • WedModerate
  • ThuModerate

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 7:20 AM
Sunset 6:16 PM
Daylight 10 h 56 min (−2 min 34 s tomorrow)
Waxing Gibbous · 71% lit
Moonrise 3:33 PM Moonset 1:17 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low61° / 41°
Record high85° (1979)
Record low21° (2022)
Wettest0.81 in (1962)
Yesterday64° / 40°
Month to date4.20 in (normal 1.77 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 10 hrs ago

Key Messages

- Above normal temperatures are expected to continue this week and a 55% chance of continuing through the end of October.

Short Term

Issued at 148 AM CDT Tue Oct 20 2026

A shortwave is visible in water vapor imagery just to our south, which has left a few lingering mid to high clouds over the area. However, these clouds have had little impact on radiational cooling, with much of the area already dropping into the low to mid 40s, though cooler temperatures may be possible in poor drainage areas. Despite the cool start to the day, today will be yet another day basking under the influence of high pressure. Winds will be weak but could support deep mixing, as was observed yesterday. If this happens, temperatures could be a degree or two warmer than the current forecast, which is in the low 70s.

Another shortwave will make its way along the edge of the ridge Wednesday, though any impacts will be limited once more to an increase in cloud cover due to weakening forcing and dry low levels. Otherwise, the forecast remains quite similar to today, if not a couple degrees warmer, as we continue in this pattern of pleasant fall weather.

Long Term

Issued at 148 AM CDT Tue Oct 20 2026

By Thursday, ridge amplification will be underway. The high pressure center will shift southward over the Great Lakes. As a result, highs in the mid 60s to low 70s are expected. Occasional cloud chances each day may help temper the gradual 1-2 degree increase each day. However, while above normal temperatures are expected to continue through the weekend, a warm and dry but dreary day may be in store for at least part of the weekend as warm conveyor belt processes ahead of an approaching shortwave trough may lead to increased cloud cover.

However, there is sizable uncertainty regarding whether this shortwave trough will impact the CWA and if so, when that would occur. Guidance continues to be divided on the track and timing of this trough, with the majority of models and ensembles favoring a slower track with any impacts arriving Monday or later. The exception to this is the GEFS and GFS, which favor a quicker progression with the trough reaching the forecast area by Sunday. As a result, while it appears likely that above normal temperatures will continue, there is low confidence on whether we receive measurable precipitation or continue with this stretch of dry weather.

Aviation

Issued at 619 AM CDT Tue Oct 20 2026

Brief MVFR vsbys are possible at MLI prior to 14z along the Rock river valley. Otherwise, VFR conditions will prevail through the period, with light southeast wind under 7kts.

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.