Annual mean
Annual mean of daily highs
Annual mean of daily lows
Adair CDP, Illinois
Official LSAD Designation: Adair CDP • Census GEOID: 1700178
• McDonough County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Adair CDP.
Reference Weather Station: PRAIRIE CITY 2S, IL US (ID: USC00116970)
• Located 12.1 miles from community center
• Elevation: 198.1 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 32.7° | 16.0° | 24.4° | 1.91" |
| February | 37.9° | 19.0° | 28.5° | 1.92" |
| March | 50.5° | 28.8° | 39.6° | 2.68" |
| April | 63.6° | 39.8° | 51.7° | 3.79" |
| May | 73.8° | 52.0° | 62.9° | 5.05" |
| June | 82.4° | 61.6° | 72.0° | 4.82" |
| July | 85.7° | 64.4° | 75.1° | 4.10" |
| August | 83.5° | 62.5° | 73.0° | 3.21" |
| September | 78.0° | 54.9° | 66.4° | 3.77" |
| October | 66.0° | 43.0° | 54.5° | 2.99" |
| November | 50.2° | 30.8° | 40.5° | 2.42" |
| December | 38.1° | 21.7° | 29.9° | 1.80" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station PRAIRIE CITY 2S, IL US (ID: USC00116970) • 12.1 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 | 52.4 | 63.0 | 41.9 |
| 2011 | 52.3 | 62.7 | 41.9 |
| 2012 | 55.2 | 66.5 | 43.9 |
| 2013 | 49.5 | 60.5 | 38.5 |
| 2014 | 47.9 | 59.1 | 36.8 |
| 2015 | 52.4 | 63.6 | 41.2 |
| 2016 | 54.5 | 64.0 | 45.0 |
| 2017 | 53.5 | 63.9 | 43.1 |
| 2018 | 51.2 | 61.3 | 41.0 |
| 2019 | 50.5 | 60.0 | 40.9 |
| 2020 | 52.4 | 62.3 | 42.4 |
| 2021 | 52.9 | 62.4 | 43.3 |
| 2022 | 50.6 | 60.8 | 40.4 |
| 2023 | 53.9 | 64.3 | 43.4 |
| 2024 | 54.5 | 64.7 | 44.4 |
| 2025 | Unavailable | Unavailable | Unavailable |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.