Annual mean
Annual mean of daily highs
Annual mean of daily lows
Olive Branch CDP, Illinois
Official LSAD Designation: Olive Branch CDP • Census GEOID: 1755847
• Alexander County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Olive Branch CDP.
Reference Weather Station: CAPE GIRARDEAU MUNI AP, MO US (ID: USW00003935)
• Located 12.5 miles from community center
• Elevation: 102.4 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 43.0° | 26.2° | 34.6° | 3.51" |
| February | 48.2° | 29.7° | 38.9° | 3.31" |
| March | 58.1° | 37.3° | 47.7° | 4.69" |
| April | 69.0° | 46.8° | 57.9° | 5.18" |
| May | 78.1° | 57.5° | 67.8° | 5.27" |
| June | 86.6° | 65.9° | 76.2° | 3.80" |
| July | 89.2° | 69.3° | 79.3° | 3.87" |
| August | 88.3° | 66.4° | 77.4° | 3.23" |
| September | 81.8° | 57.7° | 69.7° | 3.61" |
| October | 70.9° | 46.3° | 58.6° | 3.57" |
| November | 56.8° | 36.7° | 46.7° | 4.25" |
| December | 46.3° | 29.8° | 38.0° | 3.62" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station CAPE GIRARDEAU MUNI AP, MO US (ID: USW00003935) • 12.5 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 | 57.8 | 68.7 | 46.8 |
| 2011 | 58.2 | 68.4 | 47.9 |
| 2012 | 60.0 | 71.9 | 48.1 |
| 2013 | 56.0 | 66.2 | 45.8 |
| 2014 | 55.2 | 65.4 | 44.9 |
| 2015 | 57.5 | 67.6 | 47.4 |
| 2016 | 59.2 | 69.7 | 48.7 |
| 2017 | 58.8 | 69.7 | 47.9 |
| 2018 | 57.9 | 67.9 | 48.0 |
| 2019 | 58.3 | 68.2 | 48.4 |
| 2020 | 58.2 | 68.4 | 48.0 |
| 2021 | 58.5 | 69.1 | 48.0 |
| 2022 | 57.5 | 69.1 | 45.9 |
| 2023 | 59.7 | 70.8 | 48.5 |
| 2024 | 60.4 | 71.5 | 49.3 |
| 2025 | 58.5 | 69.0 | 48.0 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.