Annual mean
Annual mean of daily highs
Annual mean of daily lows
Osco CDP, Illinois
Official LSAD Designation: Osco CDP • Census GEOID: 1756796
• Henry County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Osco CDP.
Reference Weather Station: GENESEO, IL US (ID: USC00113384)
• Located 10.0 miles from community center
• Elevation: 194.8 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 30.8° | 14.6° | 22.7° | 1.64" |
| February | 35.7° | 18.6° | 27.2° | 1.81" |
| March | 48.9° | 29.3° | 39.1° | 2.70" |
| April | 62.2° | 39.9° | 51.1° | 3.96" |
| May | 73.7° | 51.6° | 62.6° | 4.87" |
| June | 82.8° | 61.5° | 72.2° | 4.42" |
| July | 85.7° | 65.1° | 75.4° | 4.13" |
| August | 83.4° | 62.9° | 73.1° | 4.10" |
| September | 77.1° | 54.5° | 65.8° | 3.57" |
| October | 64.0° | 42.9° | 53.4° | 3.21" |
| November | 48.8° | 30.7° | 39.8° | 2.56" |
| December | 35.9° | 20.5° | 28.2° | 2.12" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station GENESEO, IL US (ID: USC00113384) • 10.0 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 | 51.7 | 61.4 | 42.0 |
| 2011 | 51.8 | 61.2 | 42.4 |
| 2012 | 54.6 | 65.4 | 43.8 |
| 2013 | 49.7 | 59.6 | 39.8 |
| 2014 | 47.9 | 57.7 | 38.2 |
| 2015 | 51.7 | 61.4 | 41.9 |
| 2016 | 53.7 | 63.1 | 44.3 |
| 2017 | 52.6 | 62.5 | 42.8 |
| 2018 | 50.4 | 59.8 | 40.9 |
| 2019 | 49.7 | 58.9 | 40.4 |
| 2020 | 51.5 | 61.1 | 41.8 |
| 2021 | 51.8 | 61.2 | 42.4 |
| 2022 | 49.8 | 59.6 | 40.0 |
| 2023 | 53.0 | 62.7 | 43.2 |
| 2024 | 53.9 | 63.7 | 44.0 |
| 2025 | 52.1 | 62.2 | 42.1 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.