Annual mean
Annual mean of daily highs
Annual mean of daily lows
Mount Summit town, Indiana
Official LSAD Designation: Mount Summit town • Census GEOID: 1851714
• Henry County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Mount Summit town.
Reference Weather Station: NEW CASTLE 3 SW, IN US (ID: USC00126164)
• Located 7.6 miles from community center
• Elevation: 302.1 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 34.1° | 17.1° | 25.6° | 3.01" |
| February | 38.0° | 19.4° | 28.7° | 2.46" |
| March | 48.8° | 28.0° | 38.4° | 3.40" |
| April | 61.8° | 38.4° | 50.1° | 4.42" |
| May | 72.2° | 49.7° | 60.9° | 4.85" |
| June | 80.2° | 58.6° | 69.4° | 5.34" |
| July | 83.1° | 61.0° | 72.1° | 4.70" |
| August | 82.0° | 58.9° | 70.5° | 3.38" |
| September | 77.2° | 52.0° | 64.6° | 3.07" |
| October | 65.2° | 41.0° | 53.1° | 3.23" |
| November | 50.6° | 31.0° | 40.8° | 3.45" |
| December | 38.8° | 22.9° | 30.9° | 3.04" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station NEW CASTLE 3 SW, IN US (ID: USC00126164) • 7.6 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 | 50.5 | 61.6 | 39.4 |
| 2011 | 51.5 | 61.6 | 41.5 |
| 2012 | 53.2 | 64.8 | 41.7 |
| 2013 | 49.7 | 60.0 | 39.4 |
| 2014 | 47.5 | 58.1 | 36.9 |
| 2015 | 50.2 | 61.0 | 39.4 |
| 2016 | 52.4 | 62.9 | 41.8 |
| 2017 | 52.0 | 62.6 | 41.4 |
| 2018 | 50.7 | 60.7 | 40.7 |
| 2019 | 50.6 | 61.2 | 40.1 |
| 2020 | 51.2 | 61.5 | 40.9 |
| 2021 | 51.3 | 61.7 | 40.9 |
| 2022 | 50.0 | 61.1 | 38.9 |
| 2023 | 52.5 | 63.8 | 41.2 |
| 2024 | 53.5 | 64.6 | 42.4 |
| 2025 | 51.0 | 62.0 | 40.0 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.