Annual mean
Annual mean of daily highs
Annual mean of daily lows
Salem city, Illinois
Official LSAD Designation: Salem city • Census GEOID: 1767236
• Marion County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Salem city.
Reference Weather Station: SALEM, IL US (ID: USC00117636)
• Located 1.2 miles from community center
• Elevation: 167.6 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 38.4° | 20.8° | 29.6° | 3.07" |
| February | 43.4° | 24.0° | 33.7° | 2.56" |
| March | 54.0° | 33.0° | 43.5° | 3.73" |
| April | 66.2° | 43.7° | 55.0° | 4.69" |
| May | 75.7° | 54.6° | 65.2° | 4.99" |
| June | 84.5° | 63.8° | 74.2° | 5.08" |
| July | 87.8° | 67.4° | 77.6° | 4.07" |
| August | 86.6° | 65.2° | 75.9° | 3.80" |
| September | 80.4° | 56.9° | 68.6° | 3.54" |
| October | 68.7° | 45.0° | 56.9° | 3.44" |
| November | 54.3° | 34.0° | 44.1° | 3.99" |
| December | 42.8° | 25.6° | 34.2° | 2.93" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station SALEM, IL US (ID: USC00117636) • 1.2 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 | 55.0 | 64.7 | 45.3 |
| 2011 | 55.3 | 64.4 | 46.3 |
| 2012 | 57.9 | 68.3 | 47.5 |
| 2013 | 53.3 | 62.6 | 43.9 |
| 2014 | 51.9 | 61.4 | 42.4 |
| 2015 | 55.0 | 64.3 | 45.6 |
| 2016 | 56.5 | 65.7 | 47.4 |
| 2017 | 54.9 | 65.3 | 44.4 |
| 2018 | 54.9 | 64.5 | 45.3 |
| 2019 | 54.5 | 64.2 | 44.9 |
| 2020 | 55.6 | 65.3 | 45.9 |
| 2021 | Unavailable | 65.7 | Unavailable |
| 2022 | 54.8 | 65.1 | 44.5 |
| 2023 | 57.6 | 68.1 | 47.1 |
| 2024 | 57.9 | 68.1 | 47.7 |
| 2025 | 56.4 | 66.7 | 46.1 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.