Annual mean
Annual mean of daily highs
Annual mean of daily lows
Galesburg city, Illinois
Official LSAD Designation: Galesburg city • Census GEOID: 1728326
• Knox County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Galesburg city.
Reference Weather Station: GALESBURG, IL US (ID: USC00113320)
• Located 0.5 miles from community center
• Elevation: 232.0 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 30.0° | 13.8° | 21.9° | 1.69" |
| February | 34.7° | 17.3° | 26.0° | 1.87" |
| March | 48.0° | 28.1° | 38.0° | 2.39" |
| April | 61.3° | 39.9° | 50.6° | 3.83" |
| May | 72.0° | 51.7° | 61.8° | 5.27" |
| June | 81.2° | 62.0° | 71.6° | 4.58" |
| July | 84.0° | 65.4° | 74.7° | 4.04" |
| August | 82.3° | 63.4° | 72.8° | 3.89" |
| September | 76.2° | 54.7° | 65.5° | 3.85" |
| October | 63.0° | 42.5° | 52.8° | 2.82" |
| November | 48.0° | 29.9° | 39.0° | 2.60" |
| December | 35.4° | 20.2° | 27.8° | 2.14" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station GALESBURG, IL US (ID: USC00113320) • 0.5 miles from community center .
This is the same reference station used for monthly normals.
Source: NOAA NCEI Global Summary of the Year.
Annual temperature data table (°F)
| Year | Annual mean (°F) | Annual mean of daily highs (°F) | Annual mean of daily lows (°F) |
|---|---|---|---|
| 2010 | 50.3 | 59.7 | 41.0 |
| 2011 | 50.5 | 60.0 | 40.9 |
| 2012 | 53.6 | 63.9 | 43.3 |
| 2013 | 48.6 | 58.2 | 39.0 |
| 2014 | 46.5 | 56.0 | 37.0 |
| 2015 | 50.4 | 60.2 | 40.6 |
| 2016 | Unavailable | Unavailable | Unavailable |
| 2017 | 51.5 | 61.6 | 41.5 |
| 2018 | 49.7 | 59.0 | 40.3 |
| 2019 | 49.3 | 58.5 | 40.2 |
| 2020 | 50.7 | 59.9 | 41.5 |
| 2021 | 51.4 | 60.3 | 42.4 |
| 2022 | 49.2 | 59.1 | 39.3 |
| 2023 | 52.4 | 62.2 | 42.5 |
| 2024 | 53.2 | 63.0 | 43.3 |
| 2025 | 51.6 | 61.8 | 41.4 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.