Annual mean
Annual mean of daily highs
Annual mean of daily lows
Boulder Hill CDP, Illinois
Official LSAD Designation: Boulder Hill CDP • Census GEOID: 1707419
• Kendall County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Boulder Hill CDP.
Reference Weather Station: AURORA, IL US (ID: USC00110338)
• Located 5.0 miles from community center
• Elevation: 201.2 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 30.5° | 16.0° | 23.2° | 1.86" |
| February | 34.9° | 19.5° | 27.2° | 1.83" |
| March | 47.0° | 28.9° | 37.9° | 2.35" |
| April | 59.8° | 39.3° | 49.6° | 4.05" |
| May | 71.1° | 50.1° | 60.6° | 4.86" |
| June | 80.5° | 60.1° | 70.3° | 4.50" |
| July | 84.0° | 64.8° | 74.4° | 4.19" |
| August | 82.1° | 63.1° | 72.6° | 3.86" |
| September | 75.8° | 55.3° | 65.5° | 3.37" |
| October | 62.8° | 43.1° | 53.0° | 3.70" |
| November | 47.8° | 31.7° | 39.7° | 2.71" |
| December | 35.6° | 21.8° | 28.7° | 2.19" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station AURORA, IL US (ID: USC00110338) • 5.0 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 | Unavailable | 60.4 | Unavailable |
| 2011 | 50.6 | 59.3 | 41.8 |
| 2012 | 53.4 | 63.3 | 43.5 |
| 2013 | 48.3 | 57.5 | 39.0 |
| 2014 | 46.3 | 55.6 | 37.1 |
| 2015 | 49.8 | 59.1 | 40.5 |
| 2016 | 51.8 | 60.7 | 42.9 |
| 2017 | 51.1 | 60.5 | 41.6 |
| 2018 | 49.4 | 58.7 | 40.2 |
| 2019 | 48.7 | 57.7 | 39.6 |
| 2020 | 50.4 | 59.8 | 41.0 |
| 2021 | 51.1 | 60.2 | 41.9 |
| 2022 | 48.3 | 57.8 | 38.8 |
| 2023 | 51.4 | 61.0 | 41.7 |
| 2024 | 53.4 | 62.9 | 43.9 |
| 2025 | 51.3 | 60.9 | 41.7 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.